/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 07:19:04,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 07:19:04,438 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 07:19:04,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 07:19:04,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 07:19:04,468 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 07:19:04,468 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 07:19:04,469 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 07:19:04,469 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 07:19:04,473 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 07:19:04,473 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 07:19:04,474 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 07:19:04,474 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 07:19:04,475 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 07:19:04,476 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 07:19:04,476 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 07:19:04,476 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 07:19:04,476 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 07:19:04,476 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 07:19:04,477 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 07:19:04,477 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 07:19:04,477 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 07:19:04,477 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 07:19:04,478 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 07:19:04,478 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 07:19:04,478 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 07:19:04,478 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 07:19:04,478 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 07:19:04,479 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 07:19:04,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 07:19:04,480 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 07:19:04,480 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 07:19:04,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:19:04,480 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 07:19:04,480 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 07:19:04,480 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 07:19:04,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 07:19:04,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 07:19:04,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 07:19:04,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 07:19:04,481 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 07:19:04,481 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 07:19:04,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 07:19:04,481 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 07:19:04,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 07:19:04,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 07:19:04,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 07:19:04,739 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 07:19:04,739 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 07:19:04,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2023-12-20 07:19:05,903 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 07:19:06,097 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 07:19:06,097 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2023-12-20 07:19:06,103 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e140dbfc/54695542a2154ca9bdbf72b19d3a0f26/FLAG47efd223c [2023-12-20 07:19:06,115 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e140dbfc/54695542a2154ca9bdbf72b19d3a0f26 [2023-12-20 07:19:06,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 07:19:06,120 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 07:19:06,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 07:19:06,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 07:19:06,127 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 07:19:06,128 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2e61c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06, skipping insertion in model container [2023-12-20 07:19:06,129 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,145 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 07:19:06,249 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-industry-pattern/array_shadowinit.i[809,822] [2023-12-20 07:19:06,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:19:06,268 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 07:19:06,278 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-industry-pattern/array_shadowinit.i[809,822] [2023-12-20 07:19:06,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:19:06,299 INFO L206 MainTranslator]: Completed translation [2023-12-20 07:19:06,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06 WrapperNode [2023-12-20 07:19:06,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 07:19:06,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 07:19:06,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 07:19:06,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 07:19:06,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,311 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,325 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2023-12-20 07:19:06,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 07:19:06,326 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 07:19:06,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 07:19:06,327 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 07:19:06,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,336 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,346 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-20 07:19:06,346 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,346 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,350 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,352 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,353 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 07:19:06,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 07:19:06,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 07:19:06,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 07:19:06,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (1/1) ... [2023-12-20 07:19:06,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:19:06,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:06,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 07:19:06,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 07:19:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 07:19:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 07:19:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 07:19:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 07:19:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 07:19:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 07:19:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 07:19:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 07:19:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 07:19:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 07:19:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 07:19:06,457 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 07:19:06,459 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 07:19:06,554 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 07:19:06,572 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 07:19:06,572 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-20 07:19:06,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:19:06 BoogieIcfgContainer [2023-12-20 07:19:06,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 07:19:06,574 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 07:19:06,574 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 07:19:06,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 07:19:06,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 07:19:06" (1/3) ... [2023-12-20 07:19:06,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31afad0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:19:06, skipping insertion in model container [2023-12-20 07:19:06,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:19:06" (2/3) ... [2023-12-20 07:19:06,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31afad0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:19:06, skipping insertion in model container [2023-12-20 07:19:06,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:19:06" (3/3) ... [2023-12-20 07:19:06,580 INFO L112 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2023-12-20 07:19:06,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 07:19:06,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 07:19:06,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 07:19:06,637 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;@42595938, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 07:19:06,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 07:19:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-20 07:19:06,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:06,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:06,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:06,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -968160633, now seen corresponding path program 1 times [2023-12-20 07:19:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:06,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086228394] [2023-12-20 07:19:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:06,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:06,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086228394] [2023-12-20 07:19:06,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086228394] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:19:06,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:19:06,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 07:19:06,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828497894] [2023-12-20 07:19:06,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:19:06,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 07:19:06,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:06,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 07:19:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 07:19:06,854 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:06,884 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2023-12-20 07:19:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 07:19:06,886 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-20 07:19:06,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:06,891 INFO L225 Difference]: With dead ends: 21 [2023-12-20 07:19:06,891 INFO L226 Difference]: Without dead ends: 9 [2023-12-20 07:19:06,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 07:19:06,895 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:06,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:19:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-20 07:19:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-12-20 07:19:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-12-20 07:19:06,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2023-12-20 07:19:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:06,938 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-12-20 07:19:06,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-12-20 07:19:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-20 07:19:06,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:06,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:06,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 07:19:06,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:06,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:06,940 INFO L85 PathProgramCache]: Analyzing trace with hash -971854717, now seen corresponding path program 1 times [2023-12-20 07:19:06,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:06,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594482567] [2023-12-20 07:19:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:07,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594482567] [2023-12-20 07:19:07,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594482567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:19:07,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:19:07,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 07:19:07,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985387200] [2023-12-20 07:19:07,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:19:07,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:19:07,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:07,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:19:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:19:07,083 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:07,099 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-12-20 07:19:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:19:07,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-20 07:19:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:07,101 INFO L225 Difference]: With dead ends: 16 [2023-12-20 07:19:07,101 INFO L226 Difference]: Without dead ends: 10 [2023-12-20 07:19:07,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:19:07,103 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:07,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:19:07,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-20 07:19:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-12-20 07:19:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-12-20 07:19:07,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-12-20 07:19:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:07,111 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-12-20 07:19:07,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-12-20 07:19:07,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-20 07:19:07,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:07,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:07,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 07:19:07,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:07,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash -11279011, now seen corresponding path program 1 times [2023-12-20 07:19:07,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:07,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597523885] [2023-12-20 07:19:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:07,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:07,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:07,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597523885] [2023-12-20 07:19:07,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597523885] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:07,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942069367] [2023-12-20 07:19:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:07,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:07,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:07,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:07,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 07:19:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:07,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 07:19:07,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:07,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:19:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:07,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:07,646 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 14 treesize of output 12 [2023-12-20 07:19:07,650 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 14 treesize of output 12 [2023-12-20 07:19:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:07,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942069367] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:07,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:07,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-20 07:19:07,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030507272] [2023-12-20 07:19:07,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:07,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 07:19:07,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 07:19:07,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-20 07:19:07,664 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:07,744 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2023-12-20 07:19:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 07:19:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 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) Word has length 8 [2023-12-20 07:19:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:07,745 INFO L225 Difference]: With dead ends: 15 [2023-12-20 07:19:07,746 INFO L226 Difference]: Without dead ends: 13 [2023-12-20 07:19:07,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-12-20 07:19:07,750 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:07,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:19:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-20 07:19:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-12-20 07:19:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-12-20 07:19:07,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-12-20 07:19:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:07,761 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-12-20 07:19:07,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:07,761 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-12-20 07:19:07,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-20 07:19:07,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:07,762 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:07,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 07:19:07,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:07,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:07,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:07,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1000774144, now seen corresponding path program 1 times [2023-12-20 07:19:07,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:07,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242203718] [2023-12-20 07:19:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:07,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:08,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:08,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242203718] [2023-12-20 07:19:08,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242203718] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:08,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378572475] [2023-12-20 07:19:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:08,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:08,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:08,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 07:19:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:08,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 07:19:08,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:08,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:08,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378572475] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:08,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:08,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-20 07:19:08,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441777288] [2023-12-20 07:19:08,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:08,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 07:19:08,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 07:19:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-20 07:19:08,299 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:08,357 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-12-20 07:19:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 07:19:08,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-20 07:19:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:08,359 INFO L225 Difference]: With dead ends: 29 [2023-12-20 07:19:08,359 INFO L226 Difference]: Without dead ends: 19 [2023-12-20 07:19:08,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-20 07:19:08,361 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:08,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:19:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-20 07:19:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2023-12-20 07:19:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-12-20 07:19:08,368 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-12-20 07:19:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:08,368 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-12-20 07:19:08,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-12-20 07:19:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-20 07:19:08,369 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:08,369 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:08,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:08,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-20 07:19:08,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1774280230, now seen corresponding path program 2 times [2023-12-20 07:19:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447982094] [2023-12-20 07:19:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:08,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:08,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447982094] [2023-12-20 07:19:08,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447982094] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:08,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604190216] [2023-12-20 07:19:08,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:19:08,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:08,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:08,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:08,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 07:19:08,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:19:08,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:08,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 07:19:08,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:08,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:19:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:09,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:09,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:09,089 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 16 treesize of output 12 [2023-12-20 07:19:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:09,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604190216] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:09,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:09,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-12-20 07:19:09,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588496197] [2023-12-20 07:19:09,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:09,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-20 07:19:09,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:09,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-20 07:19:09,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-12-20 07:19:09,100 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:09,193 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-12-20 07:19:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 07:19:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 12 [2023-12-20 07:19:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:09,199 INFO L225 Difference]: With dead ends: 19 [2023-12-20 07:19:09,199 INFO L226 Difference]: Without dead ends: 17 [2023-12-20 07:19:09,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-12-20 07:19:09,200 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:09,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 37 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:19:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-20 07:19:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-12-20 07:19:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-12-20 07:19:09,205 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2023-12-20 07:19:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:09,205 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-12-20 07:19:09,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-12-20 07:19:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-20 07:19:09,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:09,206 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:09,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:09,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:09,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:09,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:09,413 INFO L85 PathProgramCache]: Analyzing trace with hash 584973411, now seen corresponding path program 3 times [2023-12-20 07:19:09,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521751635] [2023-12-20 07:19:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:09,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:09,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:09,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521751635] [2023-12-20 07:19:09,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521751635] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:09,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710778037] [2023-12-20 07:19:09,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:19:09,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:09,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:09,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:09,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 07:19:09,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 07:19:09,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:09,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 07:19:09,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:09,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:09,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710778037] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:09,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:09,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 07:19:09,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654468063] [2023-12-20 07:19:09,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:09,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 07:19:09,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 07:19:09,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:19:09,686 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:09,738 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-12-20 07:19:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 07:19:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-20 07:19:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:09,739 INFO L225 Difference]: With dead ends: 36 [2023-12-20 07:19:09,739 INFO L226 Difference]: Without dead ends: 23 [2023-12-20 07:19:09,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-20 07:19:09,740 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:09,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 28 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:19:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-20 07:19:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2023-12-20 07:19:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-20 07:19:09,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-12-20 07:19:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:09,744 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-20 07:19:09,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-20 07:19:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-20 07:19:09,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:09,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:09,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:09,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:09,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:09,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:09,953 INFO L85 PathProgramCache]: Analyzing trace with hash -978470083, now seen corresponding path program 4 times [2023-12-20 07:19:09,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:09,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024928802] [2023-12-20 07:19:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:09,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:10,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:10,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024928802] [2023-12-20 07:19:10,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024928802] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:10,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118506931] [2023-12-20 07:19:10,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:19:10,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:10,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:10,185 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:10,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 07:19:10,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:19:10,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:10,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-20 07:19:10,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:10,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:19:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:10,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:10,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:10,397 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 16 treesize of output 12 [2023-12-20 07:19:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118506931] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:10,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:10,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 16 [2023-12-20 07:19:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846979255] [2023-12-20 07:19:10,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:10,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-20 07:19:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:10,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-20 07:19:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-12-20 07:19:10,408 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:10,534 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-12-20 07:19:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 07:19:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-20 07:19:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:10,536 INFO L225 Difference]: With dead ends: 23 [2023-12-20 07:19:10,536 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 07:19:10,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-12-20 07:19:10,539 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:10,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 07:19:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-20 07:19:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-12-20 07:19:10,549 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2023-12-20 07:19:10,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:10,549 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-12-20 07:19:10,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-12-20 07:19:10,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 07:19:10,550 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:10,550 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:10,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:10,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:10,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:10,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:10,757 INFO L85 PathProgramCache]: Analyzing trace with hash 345588768, now seen corresponding path program 5 times [2023-12-20 07:19:10,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:10,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469759215] [2023-12-20 07:19:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:10,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:10,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:10,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469759215] [2023-12-20 07:19:10,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469759215] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:10,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893252765] [2023-12-20 07:19:10,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:19:10,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:10,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:10,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:10,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 07:19:10,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-20 07:19:10,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:10,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 07:19:10,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:11,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:11,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893252765] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:11,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:11,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 07:19:11,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447705524] [2023-12-20 07:19:11,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:11,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 07:19:11,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 07:19:11,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-20 07:19:11,075 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:11,150 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2023-12-20 07:19:11,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 07:19:11,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-20 07:19:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:11,151 INFO L225 Difference]: With dead ends: 43 [2023-12-20 07:19:11,152 INFO L226 Difference]: Without dead ends: 27 [2023-12-20 07:19:11,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-20 07:19:11,153 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:11,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:19:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-20 07:19:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2023-12-20 07:19:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-12-20 07:19:11,161 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-12-20 07:19:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:11,161 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-12-20 07:19:11,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-12-20 07:19:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 07:19:11,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:11,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:11,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:11,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:11,370 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:11,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:11,371 INFO L85 PathProgramCache]: Analyzing trace with hash 962201082, now seen corresponding path program 6 times [2023-12-20 07:19:11,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:11,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13196849] [2023-12-20 07:19:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:11,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:11,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:11,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13196849] [2023-12-20 07:19:11,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13196849] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:11,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613807739] [2023-12-20 07:19:11,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:19:11,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:11,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:11,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:11,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 07:19:11,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-20 07:19:11,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:11,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 07:19:11,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:11,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:19:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:11,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:11,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:11,813 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 16 treesize of output 12 [2023-12-20 07:19:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:11,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613807739] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:11,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:11,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-12-20 07:19:11,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906565217] [2023-12-20 07:19:11,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:11,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 07:19:11,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 07:19:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-12-20 07:19:11,829 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:11,990 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-12-20 07:19:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 07:19:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-20 07:19:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:11,991 INFO L225 Difference]: With dead ends: 27 [2023-12-20 07:19:11,991 INFO L226 Difference]: Without dead ends: 25 [2023-12-20 07:19:11,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-12-20 07:19:11,993 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:11,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 69 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-20 07:19:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-12-20 07:19:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-12-20 07:19:12,000 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2023-12-20 07:19:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:12,000 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-12-20 07:19:12,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-12-20 07:19:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-20 07:19:12,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:12,001 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:12,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:12,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:12,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:12,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash 325493827, now seen corresponding path program 7 times [2023-12-20 07:19:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:12,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64736970] [2023-12-20 07:19:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:12,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:12,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:12,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64736970] [2023-12-20 07:19:12,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64736970] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:12,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205736541] [2023-12-20 07:19:12,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:19:12,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:12,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:12,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:12,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 07:19:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:12,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 07:19:12,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:12,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:12,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205736541] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:12,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:12,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-20 07:19:12,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558681065] [2023-12-20 07:19:12,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:12,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 07:19:12,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:12,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 07:19:12,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-20 07:19:12,577 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:12,659 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-12-20 07:19:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 07:19:12,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-20 07:19:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:12,662 INFO L225 Difference]: With dead ends: 50 [2023-12-20 07:19:12,662 INFO L226 Difference]: Without dead ends: 31 [2023-12-20 07:19:12,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-12-20 07:19:12,663 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:12,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:19:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-20 07:19:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2023-12-20 07:19:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-12-20 07:19:12,672 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-12-20 07:19:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:12,673 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-12-20 07:19:12,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-12-20 07:19:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-20 07:19:12,673 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:12,674 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:12,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:12,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 07:19:12,880 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:12,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2082543331, now seen corresponding path program 8 times [2023-12-20 07:19:12,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:12,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742747843] [2023-12-20 07:19:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:12,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:13,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:13,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742747843] [2023-12-20 07:19:13,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742747843] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:13,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540912726] [2023-12-20 07:19:13,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:19:13,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:13,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:13,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:13,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 07:19:13,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:19:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:13,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 07:19:13,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:13,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:19:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:13,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:13,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:13,750 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 16 treesize of output 12 [2023-12-20 07:19:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:13,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540912726] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:13,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:13,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2023-12-20 07:19:13,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831864727] [2023-12-20 07:19:13,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:13,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-20 07:19:13,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:13,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-20 07:19:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2023-12-20 07:19:13,845 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:14,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:14,091 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-12-20 07:19:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 07:19:14,092 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 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 24 [2023-12-20 07:19:14,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:14,092 INFO L225 Difference]: With dead ends: 31 [2023-12-20 07:19:14,092 INFO L226 Difference]: Without dead ends: 29 [2023-12-20 07:19:14,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2023-12-20 07:19:14,094 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:14,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-20 07:19:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-12-20 07:19:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-12-20 07:19:14,098 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2023-12-20 07:19:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:14,098 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-12-20 07:19:14,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-12-20 07:19:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-20 07:19:14,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:14,099 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:14,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:14,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:14,306 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:14,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:14,306 INFO L85 PathProgramCache]: Analyzing trace with hash -240989632, now seen corresponding path program 9 times [2023-12-20 07:19:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:14,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117281620] [2023-12-20 07:19:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:14,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:14,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:14,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117281620] [2023-12-20 07:19:14,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117281620] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:14,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441994410] [2023-12-20 07:19:14,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:19:14,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:14,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:14,469 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:14,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 07:19:14,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-20 07:19:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:14,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 07:19:14,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:14,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:14,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441994410] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:14,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:14,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-20 07:19:14,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035667588] [2023-12-20 07:19:14,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:14,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 07:19:14,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:14,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 07:19:14,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-20 07:19:14,833 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:14,943 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2023-12-20 07:19:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 07:19:14,943 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-20 07:19:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:14,944 INFO L225 Difference]: With dead ends: 57 [2023-12-20 07:19:14,944 INFO L226 Difference]: Without dead ends: 35 [2023-12-20 07:19:14,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-12-20 07:19:14,945 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:14,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-20 07:19:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2023-12-20 07:19:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-12-20 07:19:14,950 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2023-12-20 07:19:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:14,950 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-12-20 07:19:14,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-12-20 07:19:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 07:19:14,951 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:14,951 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:14,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:15,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-20 07:19:15,157 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:15,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:15,158 INFO L85 PathProgramCache]: Analyzing trace with hash 811143706, now seen corresponding path program 10 times [2023-12-20 07:19:15,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:15,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942438695] [2023-12-20 07:19:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:15,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:15,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:15,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942438695] [2023-12-20 07:19:15,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942438695] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:15,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077860180] [2023-12-20 07:19:15,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:19:15,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:15,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:15,477 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:15,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 07:19:15,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:19:15,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:15,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-20 07:19:15,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:15,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:19:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:15,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:15,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:15,824 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 16 treesize of output 12 [2023-12-20 07:19:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:15,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077860180] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:15,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:15,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 25 [2023-12-20 07:19:15,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205346719] [2023-12-20 07:19:15,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:15,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 07:19:15,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:15,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 07:19:15,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2023-12-20 07:19:15,834 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:16,131 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2023-12-20 07:19:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 07:19:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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) Word has length 28 [2023-12-20 07:19:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:16,132 INFO L225 Difference]: With dead ends: 35 [2023-12-20 07:19:16,132 INFO L226 Difference]: Without dead ends: 33 [2023-12-20 07:19:16,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 07:19:16,133 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:16,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:19:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-20 07:19:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-12-20 07:19:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-12-20 07:19:16,138 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-12-20 07:19:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:16,138 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-12-20 07:19:16,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-12-20 07:19:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-20 07:19:16,139 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:16,139 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:16,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:16,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 07:19:16,340 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:16,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:16,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1300931619, now seen corresponding path program 11 times [2023-12-20 07:19:16,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:16,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511739462] [2023-12-20 07:19:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:16,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:16,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511739462] [2023-12-20 07:19:16,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511739462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161468661] [2023-12-20 07:19:16,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:19:16,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:16,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:16,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:16,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 07:19:16,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-20 07:19:16,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:16,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 07:19:16,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:16,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:16,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161468661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:16,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:16,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-20 07:19:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051992319] [2023-12-20 07:19:16,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:16,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 07:19:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 07:19:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-20 07:19:16,916 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:17,033 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2023-12-20 07:19:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 07:19:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-20 07:19:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:17,034 INFO L225 Difference]: With dead ends: 64 [2023-12-20 07:19:17,034 INFO L226 Difference]: Without dead ends: 39 [2023-12-20 07:19:17,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 07:19:17,035 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:17,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 51 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-20 07:19:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2023-12-20 07:19:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-12-20 07:19:17,040 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2023-12-20 07:19:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:17,040 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-12-20 07:19:17,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-12-20 07:19:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 07:19:17,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:17,041 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:17,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:17,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-20 07:19:17,247 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:17,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash 902131453, now seen corresponding path program 12 times [2023-12-20 07:19:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:17,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379772796] [2023-12-20 07:19:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:17,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:17,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:17,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379772796] [2023-12-20 07:19:17,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379772796] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:17,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740409768] [2023-12-20 07:19:17,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:19:17,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:17,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:17,593 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:17,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 07:19:17,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 07:19:17,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:17,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-20 07:19:17,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:17,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:19:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:18,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:18,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:18,631 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 16 treesize of output 12 [2023-12-20 07:19:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:18,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740409768] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:18,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:18,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2023-12-20 07:19:18,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914234650] [2023-12-20 07:19:18,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:18,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-20 07:19:18,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:18,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-20 07:19:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 07:19:18,851 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 53 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:20,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:20,538 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2023-12-20 07:19:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-20 07:19:20,538 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 53 states have internal predecessors, (91), 0 states have call successors, (0), 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 32 [2023-12-20 07:19:20,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:20,539 INFO L225 Difference]: With dead ends: 88 [2023-12-20 07:19:20,539 INFO L226 Difference]: Without dead ends: 86 [2023-12-20 07:19:20,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1002, Invalid=7554, Unknown=0, NotChecked=0, Total=8556 [2023-12-20 07:19:20,541 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 133 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:20,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 258 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 07:19:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-20 07:19:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2023-12-20 07:19:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-12-20 07:19:20,559 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 32 [2023-12-20 07:19:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:20,560 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-12-20 07:19:20,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 53 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-12-20 07:19:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 07:19:20,561 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:20,561 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:20,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:20,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-20 07:19:20,768 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:20,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash -794966470, now seen corresponding path program 13 times [2023-12-20 07:19:20,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:20,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817920272] [2023-12-20 07:19:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:20,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:21,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:21,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817920272] [2023-12-20 07:19:21,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817920272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:21,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674752458] [2023-12-20 07:19:21,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:19:21,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:21,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:21,194 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:21,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 07:19:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:21,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-20 07:19:21,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:21,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:19:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:21,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:21,809 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 [2023-12-20 07:19:21,811 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 16 treesize of output 12 [2023-12-20 07:19:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:21,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674752458] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:21,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:21,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2023-12-20 07:19:21,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995742765] [2023-12-20 07:19:21,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:21,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-20 07:19:21,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-20 07:19:21,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2023-12-20 07:19:21,821 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:22,245 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2023-12-20 07:19:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 07:19:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-20 07:19:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:22,246 INFO L225 Difference]: With dead ends: 90 [2023-12-20 07:19:22,246 INFO L226 Difference]: Without dead ends: 88 [2023-12-20 07:19:22,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=2164, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 07:19:22,247 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:22,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 336 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:19:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-20 07:19:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 59. [2023-12-20 07:19:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-12-20 07:19:22,259 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 36 [2023-12-20 07:19:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:22,260 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-12-20 07:19:22,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-12-20 07:19:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 07:19:22,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:22,261 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:22,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:22,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:22,468 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:22,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:22,469 INFO L85 PathProgramCache]: Analyzing trace with hash -391644157, now seen corresponding path program 14 times [2023-12-20 07:19:22,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:22,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205670740] [2023-12-20 07:19:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:22,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:22,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205670740] [2023-12-20 07:19:22,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205670740] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35054735] [2023-12-20 07:19:22,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:19:22,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:22,770 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:22,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 07:19:22,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:19:22,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:22,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 07:19:22,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:23,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:23,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35054735] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:23,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:23,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-20 07:19:23,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432496593] [2023-12-20 07:19:23,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:23,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-20 07:19:23,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-20 07:19:23,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-20 07:19:23,233 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:23,473 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2023-12-20 07:19:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 07:19:23,474 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 39 [2023-12-20 07:19:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:23,474 INFO L225 Difference]: With dead ends: 120 [2023-12-20 07:19:23,474 INFO L226 Difference]: Without dead ends: 47 [2023-12-20 07:19:23,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 17 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 07:19:23,476 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:23,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 81 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-20 07:19:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-12-20 07:19:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-12-20 07:19:23,485 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2023-12-20 07:19:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:23,485 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-12-20 07:19:23,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-12-20 07:19:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 07:19:23,486 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:23,486 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:23,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:23,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-20 07:19:23,692 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:23,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 952061149, now seen corresponding path program 15 times [2023-12-20 07:19:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:23,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716667116] [2023-12-20 07:19:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:23,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716667116] [2023-12-20 07:19:24,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716667116] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866780724] [2023-12-20 07:19:24,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:19:24,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:24,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:24,343 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:24,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 07:19:24,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-20 07:19:24,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:24,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-20 07:19:24,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:24,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:19:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:25,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:25,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:25,463 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 16 treesize of output 12 [2023-12-20 07:19:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:25,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866780724] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:25,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:25,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2023-12-20 07:19:25,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668190322] [2023-12-20 07:19:25,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:25,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-20 07:19:25,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-20 07:19:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2410, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 07:19:25,476 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:26,284 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2023-12-20 07:19:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 07:19:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-20 07:19:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:26,285 INFO L225 Difference]: With dead ends: 47 [2023-12-20 07:19:26,285 INFO L226 Difference]: Without dead ends: 45 [2023-12-20 07:19:26,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=291, Invalid=4401, Unknown=0, NotChecked=0, Total=4692 [2023-12-20 07:19:26,287 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:26,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 353 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:19:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-20 07:19:26,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-12-20 07:19:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-12-20 07:19:26,296 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2023-12-20 07:19:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:26,297 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-12-20 07:19:26,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-12-20 07:19:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-20 07:19:26,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:26,297 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:26,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 07:19:26,504 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:26,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1105539456, now seen corresponding path program 16 times [2023-12-20 07:19:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115056981] [2023-12-20 07:19:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:26,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:26,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115056981] [2023-12-20 07:19:26,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115056981] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:26,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977402618] [2023-12-20 07:19:26,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:19:26,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:26,813 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:26,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 07:19:26,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:19:26,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:26,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 07:19:26,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:27,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:27,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977402618] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:27,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:27,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-20 07:19:27,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221940370] [2023-12-20 07:19:27,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:27,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-20 07:19:27,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:27,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-20 07:19:27,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 07:19:27,433 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:27,596 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2023-12-20 07:19:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 07:19:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-20 07:19:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:27,597 INFO L225 Difference]: With dead ends: 85 [2023-12-20 07:19:27,597 INFO L226 Difference]: Without dead ends: 51 [2023-12-20 07:19:27,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-12-20 07:19:27,598 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 109 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:27,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 64 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-20 07:19:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-12-20 07:19:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-12-20 07:19:27,606 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2023-12-20 07:19:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:27,607 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-12-20 07:19:27,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-12-20 07:19:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 07:19:27,607 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:27,607 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:27,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:27,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:27,808 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:27,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1643503014, now seen corresponding path program 17 times [2023-12-20 07:19:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:27,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47033609] [2023-12-20 07:19:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:27,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:28,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47033609] [2023-12-20 07:19:28,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47033609] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964058391] [2023-12-20 07:19:28,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:19:28,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:28,352 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:28,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 07:19:28,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-20 07:19:28,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:28,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-20 07:19:28,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:28,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:19:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:29,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:29,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:29,318 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 16 treesize of output 12 [2023-12-20 07:19:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:29,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964058391] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:29,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:29,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 49 [2023-12-20 07:19:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951942394] [2023-12-20 07:19:29,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:29,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-20 07:19:29,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-20 07:19:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2205, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 07:19:29,330 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 49 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:29,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:29,954 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-12-20 07:19:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 07:19:29,954 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 49 states have internal predecessors, (92), 0 states have call successors, (0), 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 44 [2023-12-20 07:19:29,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:29,954 INFO L225 Difference]: With dead ends: 51 [2023-12-20 07:19:29,954 INFO L226 Difference]: Without dead ends: 49 [2023-12-20 07:19:29,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=3415, Unknown=0, NotChecked=0, Total=3660 [2023-12-20 07:19:29,956 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:29,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 351 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 07:19:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-20 07:19:29,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-12-20 07:19:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-12-20 07:19:29,965 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2023-12-20 07:19:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:29,965 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-12-20 07:19:29,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 49 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:29,966 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-12-20 07:19:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-20 07:19:29,966 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:29,966 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:29,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:30,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:30,173 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:30,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:30,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1033677795, now seen corresponding path program 18 times [2023-12-20 07:19:30,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:30,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014494431] [2023-12-20 07:19:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:30,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:30,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:30,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014494431] [2023-12-20 07:19:30,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014494431] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:30,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022538937] [2023-12-20 07:19:30,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:19:30,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:30,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:30,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:30,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 07:19:30,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-20 07:19:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:30,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 07:19:30,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:30,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:31,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022538937] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:31,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:31,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-12-20 07:19:31,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390540915] [2023-12-20 07:19:31,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:31,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-20 07:19:31,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:31,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-20 07:19:31,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 07:19:31,191 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:31,406 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2023-12-20 07:19:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-20 07:19:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-20 07:19:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:31,408 INFO L225 Difference]: With dead ends: 92 [2023-12-20 07:19:31,408 INFO L226 Difference]: Without dead ends: 55 [2023-12-20 07:19:31,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 07:19:31,411 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 93 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:31,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 95 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-20 07:19:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-12-20 07:19:31,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-12-20 07:19:31,424 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2023-12-20 07:19:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:31,425 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-12-20 07:19:31,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-12-20 07:19:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-20 07:19:31,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:31,426 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:31,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:31,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:31,633 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:31,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:31,633 INFO L85 PathProgramCache]: Analyzing trace with hash 732594877, now seen corresponding path program 19 times [2023-12-20 07:19:31,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:31,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671221226] [2023-12-20 07:19:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:31,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:32,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:32,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671221226] [2023-12-20 07:19:32,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671221226] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:32,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245998308] [2023-12-20 07:19:32,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:19:32,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:32,242 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:32,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-20 07:19:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:32,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-20 07:19:32,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:32,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:19:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:33,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:33,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:33,191 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 16 treesize of output 12 [2023-12-20 07:19:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:33,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245998308] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:33,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:33,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-12-20 07:19:33,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38387878] [2023-12-20 07:19:33,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:33,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-20 07:19:33,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:33,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-20 07:19:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 07:19:33,207 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:33,848 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2023-12-20 07:19:33,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-20 07:19:33,851 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 states have internal predecessors, (98), 0 states have call successors, (0), 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 48 [2023-12-20 07:19:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:33,851 INFO L225 Difference]: With dead ends: 55 [2023-12-20 07:19:33,851 INFO L226 Difference]: Without dead ends: 53 [2023-12-20 07:19:33,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=3663, Unknown=0, NotChecked=0, Total=3906 [2023-12-20 07:19:33,853 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:33,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 407 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 07:19:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-20 07:19:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-12-20 07:19:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-12-20 07:19:33,866 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2023-12-20 07:19:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:33,866 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-12-20 07:19:33,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-12-20 07:19:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-20 07:19:33,867 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:33,867 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:33,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:34,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-20 07:19:34,068 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:34,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2009943200, now seen corresponding path program 20 times [2023-12-20 07:19:34,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:34,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374294694] [2023-12-20 07:19:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:34,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:34,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:34,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374294694] [2023-12-20 07:19:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374294694] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:34,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492517706] [2023-12-20 07:19:34,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:19:34,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:34,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:34,449 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:34,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-20 07:19:34,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:19:34,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:34,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 07:19:34,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:34,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:35,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492517706] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:35,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:35,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-20 07:19:35,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378499330] [2023-12-20 07:19:35,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:35,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-20 07:19:35,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-20 07:19:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 07:19:35,123 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:35,307 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2023-12-20 07:19:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 07:19:35,308 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 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 51 [2023-12-20 07:19:35,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:35,308 INFO L225 Difference]: With dead ends: 99 [2023-12-20 07:19:35,308 INFO L226 Difference]: Without dead ends: 59 [2023-12-20 07:19:35,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 65 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 07:19:35,310 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 87 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:35,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 85 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-20 07:19:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-12-20 07:19:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-12-20 07:19:35,321 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2023-12-20 07:19:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:35,321 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-12-20 07:19:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-12-20 07:19:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-20 07:19:35,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:35,322 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:35,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:35,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-20 07:19:35,529 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:35,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1795171962, now seen corresponding path program 21 times [2023-12-20 07:19:35,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:35,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206240707] [2023-12-20 07:19:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:36,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:36,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206240707] [2023-12-20 07:19:36,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206240707] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:36,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560138604] [2023-12-20 07:19:36,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:19:36,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:36,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:36,148 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:36,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 07:19:36,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-20 07:19:36,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:36,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-20 07:19:36,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:36,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:19:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:36,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:37,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:37,020 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 16 treesize of output 12 [2023-12-20 07:19:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:37,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560138604] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:37,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:37,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 41 [2023-12-20 07:19:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684554434] [2023-12-20 07:19:37,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:37,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-20 07:19:37,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-20 07:19:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 07:19:37,035 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:37,668 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2023-12-20 07:19:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-20 07:19:37,669 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 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 52 [2023-12-20 07:19:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:37,669 INFO L225 Difference]: With dead ends: 59 [2023-12-20 07:19:37,669 INFO L226 Difference]: Without dead ends: 57 [2023-12-20 07:19:37,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 07:19:37,670 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:37,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 422 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 07:19:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-20 07:19:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-12-20 07:19:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-12-20 07:19:37,682 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2023-12-20 07:19:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:37,682 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-12-20 07:19:37,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-12-20 07:19:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-20 07:19:37,683 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:37,683 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:37,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:37,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:37,890 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:37,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash -960056381, now seen corresponding path program 22 times [2023-12-20 07:19:37,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:37,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983326538] [2023-12-20 07:19:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:37,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:38,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:38,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983326538] [2023-12-20 07:19:38,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983326538] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:38,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762213470] [2023-12-20 07:19:38,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:19:38,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:38,294 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:38,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 07:19:38,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:19:38,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:38,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 07:19:38,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:38,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:39,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762213470] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:39,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:39,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-12-20 07:19:39,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806096955] [2023-12-20 07:19:39,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:39,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-20 07:19:39,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-20 07:19:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-12-20 07:19:39,049 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:39,240 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2023-12-20 07:19:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 07:19:39,241 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-20 07:19:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:39,241 INFO L225 Difference]: With dead ends: 106 [2023-12-20 07:19:39,241 INFO L226 Difference]: Without dead ends: 63 [2023-12-20 07:19:39,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 70 SyntacticMatches, 25 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-12-20 07:19:39,242 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:39,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 102 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-20 07:19:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2023-12-20 07:19:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-12-20 07:19:39,253 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2023-12-20 07:19:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:39,253 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-12-20 07:19:39,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-12-20 07:19:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-20 07:19:39,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:39,254 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:39,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-20 07:19:39,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:39,454 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:39,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:39,455 INFO L85 PathProgramCache]: Analyzing trace with hash -823848803, now seen corresponding path program 23 times [2023-12-20 07:19:39,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:39,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305383632] [2023-12-20 07:19:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:39,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:40,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:40,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305383632] [2023-12-20 07:19:40,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305383632] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:40,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068099629] [2023-12-20 07:19:40,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:19:40,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:40,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:40,425 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:40,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-20 07:19:40,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-12-20 07:19:40,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:40,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-20 07:19:40,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:40,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:19:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:40,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:41,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:41,309 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 16 treesize of output 12 [2023-12-20 07:19:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:41,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068099629] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:41,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:41,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 60 [2023-12-20 07:19:41,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485232274] [2023-12-20 07:19:41,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:41,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-12-20 07:19:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:41,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-12-20 07:19:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3362, Unknown=0, NotChecked=0, Total=3540 [2023-12-20 07:19:41,640 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 60 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:42,671 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2023-12-20 07:19:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-20 07:19:42,671 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 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) Word has length 56 [2023-12-20 07:19:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:42,671 INFO L225 Difference]: With dead ends: 63 [2023-12-20 07:19:42,671 INFO L226 Difference]: Without dead ends: 61 [2023-12-20 07:19:42,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=299, Invalid=5251, Unknown=0, NotChecked=0, Total=5550 [2023-12-20 07:19:42,673 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:42,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 577 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 07:19:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-20 07:19:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-12-20 07:19:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2023-12-20 07:19:42,686 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2023-12-20 07:19:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:42,686 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2023-12-20 07:19:42,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2023-12-20 07:19:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-20 07:19:42,686 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:42,686 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:42,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-20 07:19:42,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-20 07:19:42,887 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:42,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1831767360, now seen corresponding path program 24 times [2023-12-20 07:19:42,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:42,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418402413] [2023-12-20 07:19:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:42,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:43,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:43,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418402413] [2023-12-20 07:19:43,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418402413] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773884463] [2023-12-20 07:19:43,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:19:43,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:43,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:43,359 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:43,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-20 07:19:44,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-12-20 07:19:44,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:44,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 07:19:44,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:44,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:44,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773884463] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:44,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:44,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-12-20 07:19:44,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608416836] [2023-12-20 07:19:44,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:44,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-20 07:19:44,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:44,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-20 07:19:44,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 07:19:44,691 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:44,904 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2023-12-20 07:19:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 07:19:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 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 59 [2023-12-20 07:19:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:44,905 INFO L225 Difference]: With dead ends: 113 [2023-12-20 07:19:44,905 INFO L226 Difference]: Without dead ends: 67 [2023-12-20 07:19:44,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 75 SyntacticMatches, 27 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-12-20 07:19:44,906 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 153 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:44,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 117 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:44,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-20 07:19:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2023-12-20 07:19:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-12-20 07:19:44,915 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2023-12-20 07:19:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:44,915 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-12-20 07:19:44,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-12-20 07:19:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 07:19:44,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:44,916 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:44,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-20 07:19:45,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-20 07:19:45,117 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:45,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2019676826, now seen corresponding path program 25 times [2023-12-20 07:19:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:45,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986469049] [2023-12-20 07:19:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:45,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:45,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986469049] [2023-12-20 07:19:45,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986469049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:45,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202750424] [2023-12-20 07:19:45,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:19:45,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:45,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:45,973 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:45,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-20 07:19:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:46,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-20 07:19:46,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:46,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:19:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:47,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:47,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:47,290 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 16 treesize of output 12 [2023-12-20 07:19:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:47,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202750424] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:47,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:47,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-12-20 07:19:47,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585819687] [2023-12-20 07:19:47,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:47,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-20 07:19:47,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-20 07:19:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2023-12-20 07:19:47,304 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 63 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:48,160 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2023-12-20 07:19:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-20 07:19:48,161 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 63 states have internal predecessors, (122), 0 states have call successors, (0), 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 60 [2023-12-20 07:19:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:48,161 INFO L225 Difference]: With dead ends: 67 [2023-12-20 07:19:48,161 INFO L226 Difference]: Without dead ends: 65 [2023-12-20 07:19:48,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=5703, Unknown=0, NotChecked=0, Total=6006 [2023-12-20 07:19:48,162 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:48,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 614 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 07:19:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-20 07:19:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-12-20 07:19:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-12-20 07:19:48,174 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2023-12-20 07:19:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:48,174 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-12-20 07:19:48,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 63 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-12-20 07:19:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-20 07:19:48,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:48,175 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:48,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-20 07:19:48,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-20 07:19:48,382 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:48,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:48,382 INFO L85 PathProgramCache]: Analyzing trace with hash 267171, now seen corresponding path program 26 times [2023-12-20 07:19:48,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:48,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324581633] [2023-12-20 07:19:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:48,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:48,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:48,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324581633] [2023-12-20 07:19:48,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324581633] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:48,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48194885] [2023-12-20 07:19:48,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:19:48,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:48,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:48,930 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:48,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-20 07:19:49,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:19:49,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:49,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 07:19:49,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:49,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:49,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48194885] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:49,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:49,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-20 07:19:49,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485972891] [2023-12-20 07:19:49,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:49,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-20 07:19:49,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:49,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-20 07:19:49,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 07:19:49,822 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:50,051 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2023-12-20 07:19:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-20 07:19:50,052 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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) Word has length 63 [2023-12-20 07:19:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:50,053 INFO L225 Difference]: With dead ends: 120 [2023-12-20 07:19:50,053 INFO L226 Difference]: Without dead ends: 71 [2023-12-20 07:19:50,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 80 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 07:19:50,054 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 129 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:50,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 135 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:19:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-20 07:19:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2023-12-20 07:19:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-12-20 07:19:50,068 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2023-12-20 07:19:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:50,068 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-12-20 07:19:50,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-12-20 07:19:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-20 07:19:50,069 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:50,069 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:50,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-20 07:19:50,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-20 07:19:50,269 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:50,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:50,270 INFO L85 PathProgramCache]: Analyzing trace with hash -464718211, now seen corresponding path program 27 times [2023-12-20 07:19:50,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:50,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911854436] [2023-12-20 07:19:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:50,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:51,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911854436] [2023-12-20 07:19:51,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911854436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:51,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77538228] [2023-12-20 07:19:51,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:19:51,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:51,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:51,145 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:51,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-20 07:19:51,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-12-20 07:19:51,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:51,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-20 07:19:51,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:51,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:19:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:52,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:52,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:52,464 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 16 treesize of output 12 [2023-12-20 07:19:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77538228] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:52,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 50 [2023-12-20 07:19:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592549598] [2023-12-20 07:19:52,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:52,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-20 07:19:52,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-20 07:19:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2322, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 07:19:52,479 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:53,436 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2023-12-20 07:19:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-20 07:19:53,436 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-12-20 07:19:53,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:53,437 INFO L225 Difference]: With dead ends: 71 [2023-12-20 07:19:53,437 INFO L226 Difference]: Without dead ends: 69 [2023-12-20 07:19:53,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=4052, Unknown=0, NotChecked=0, Total=4290 [2023-12-20 07:19:53,438 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:53,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 654 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 07:19:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-20 07:19:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2023-12-20 07:19:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-12-20 07:19:53,448 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2023-12-20 07:19:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:53,449 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-12-20 07:19:53,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-12-20 07:19:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 07:19:53,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:53,449 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:53,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-20 07:19:53,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:53,650 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:53,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1735835424, now seen corresponding path program 28 times [2023-12-20 07:19:53,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:53,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421472158] [2023-12-20 07:19:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:53,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:54,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:54,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421472158] [2023-12-20 07:19:54,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421472158] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:54,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777140477] [2023-12-20 07:19:54,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:19:54,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:54,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:54,254 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:54,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-20 07:19:54,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:19:54,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:54,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-20 07:19:54,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:55,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:55,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777140477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:55,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:55,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-12-20 07:19:55,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268761633] [2023-12-20 07:19:55,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:55,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-20 07:19:55,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:55,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-20 07:19:55,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 07:19:55,402 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:55,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:55,692 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2023-12-20 07:19:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 07:19:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-12-20 07:19:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:55,693 INFO L225 Difference]: With dead ends: 127 [2023-12-20 07:19:55,693 INFO L226 Difference]: Without dead ends: 75 [2023-12-20 07:19:55,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 85 SyntacticMatches, 31 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2023-12-20 07:19:55,694 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:55,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 146 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:19:55,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-20 07:19:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2023-12-20 07:19:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2023-12-20 07:19:55,708 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2023-12-20 07:19:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:55,708 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2023-12-20 07:19:55,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2023-12-20 07:19:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-20 07:19:55,709 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:55,709 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:55,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-20 07:19:55,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:55,910 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:19:55,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:19:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1785649478, now seen corresponding path program 29 times [2023-12-20 07:19:55,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:19:55,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663323085] [2023-12-20 07:19:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:19:55,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:19:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:19:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:56,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:19:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663323085] [2023-12-20 07:19:56,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663323085] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:19:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969308919] [2023-12-20 07:19:56,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:19:56,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:19:56,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:19:56,888 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:19:56,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-20 07:19:57,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-12-20 07:19:57,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:19:57,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-20 07:19:57,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:19:57,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:19:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:58,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:19:58,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:19:58,748 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 16 treesize of output 12 [2023-12-20 07:19:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:19:58,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969308919] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:19:58,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:19:58,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 73 [2023-12-20 07:19:58,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975547161] [2023-12-20 07:19:58,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:19:58,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-20 07:19:58,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:19:58,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-20 07:19:58,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5037, Unknown=0, NotChecked=0, Total=5256 [2023-12-20 07:19:58,765 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:19:59,936 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2023-12-20 07:19:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-20 07:19:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 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 68 [2023-12-20 07:19:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:19:59,936 INFO L225 Difference]: With dead ends: 75 [2023-12-20 07:19:59,937 INFO L226 Difference]: Without dead ends: 73 [2023-12-20 07:19:59,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=365, Invalid=7825, Unknown=0, NotChecked=0, Total=8190 [2023-12-20 07:19:59,938 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 07:19:59,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 785 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 07:19:59,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-20 07:19:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2023-12-20 07:19:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2023-12-20 07:19:59,949 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2023-12-20 07:19:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:19:59,950 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2023-12-20 07:19:59,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:19:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2023-12-20 07:19:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 07:19:59,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:19:59,950 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2023-12-20 07:19:59,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-20 07:20:00,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-20 07:20:00,158 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:00,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:00,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1186122627, now seen corresponding path program 30 times [2023-12-20 07:20:00,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:00,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129661077] [2023-12-20 07:20:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:00,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:00,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:00,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129661077] [2023-12-20 07:20:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129661077] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305789196] [2023-12-20 07:20:00,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:20:00,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:00,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:00,761 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:00,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-20 07:20:01,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-12-20 07:20:01,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:20:01,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-20 07:20:01,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:01,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:02,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305789196] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:02,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:02,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-12-20 07:20:02,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431573201] [2023-12-20 07:20:02,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:02,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-20 07:20:02,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-20 07:20:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 07:20:02,182 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:02,465 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2023-12-20 07:20:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-20 07:20:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 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 71 [2023-12-20 07:20:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:02,466 INFO L225 Difference]: With dead ends: 134 [2023-12-20 07:20:02,466 INFO L226 Difference]: Without dead ends: 79 [2023-12-20 07:20:02,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 90 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-12-20 07:20:02,466 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 133 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:02,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 163 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:20:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-20 07:20:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2023-12-20 07:20:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-12-20 07:20:02,479 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2023-12-20 07:20:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:02,479 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-12-20 07:20:02,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-12-20 07:20:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-20 07:20:02,480 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:02,480 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:02,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-20 07:20:02,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:02,680 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:02,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash 255865949, now seen corresponding path program 31 times [2023-12-20 07:20:02,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:02,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228303415] [2023-12-20 07:20:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:02,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:03,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:03,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228303415] [2023-12-20 07:20:03,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228303415] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:03,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30781115] [2023-12-20 07:20:03,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:20:03,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:03,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:03,965 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:03,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-20 07:20:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:04,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-20 07:20:04,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:04,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:20:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:04,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:05,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:20:05,683 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 16 treesize of output 12 [2023-12-20 07:20:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:06,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30781115] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:06,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:06,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 90 [2023-12-20 07:20:06,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741904438] [2023-12-20 07:20:06,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:06,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-12-20 07:20:06,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:06,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-12-20 07:20:06,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=7731, Unknown=0, NotChecked=0, Total=8010 [2023-12-20 07:20:06,395 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 90 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:08,180 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2023-12-20 07:20:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-20 07:20:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 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 72 [2023-12-20 07:20:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:08,181 INFO L225 Difference]: With dead ends: 79 [2023-12-20 07:20:08,181 INFO L226 Difference]: Without dead ends: 77 [2023-12-20 07:20:08,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=437, Invalid=11119, Unknown=0, NotChecked=0, Total=11556 [2023-12-20 07:20:08,182 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 3611 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:08,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1188 Invalid, 3629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3611 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 07:20:08,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-20 07:20:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2023-12-20 07:20:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2023-12-20 07:20:08,195 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2023-12-20 07:20:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:08,195 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2023-12-20 07:20:08,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1) internal successors, (189), 90 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2023-12-20 07:20:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-20 07:20:08,196 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:08,196 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:08,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-20 07:20:08,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:08,397 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:08,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1059670272, now seen corresponding path program 32 times [2023-12-20 07:20:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:08,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622749286] [2023-12-20 07:20:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:09,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:09,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622749286] [2023-12-20 07:20:09,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622749286] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:09,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747391623] [2023-12-20 07:20:09,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:20:09,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:09,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:09,029 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:09,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-20 07:20:09,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:20:09,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:20:09,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-20 07:20:09,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:09,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:10,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747391623] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:10,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:10,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-12-20 07:20:10,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311028011] [2023-12-20 07:20:10,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:10,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-20 07:20:10,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:10,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-20 07:20:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2023-12-20 07:20:10,175 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:10,480 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2023-12-20 07:20:10,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-20 07:20:10,480 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 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 75 [2023-12-20 07:20:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:10,481 INFO L225 Difference]: With dead ends: 141 [2023-12-20 07:20:10,481 INFO L226 Difference]: Without dead ends: 83 [2023-12-20 07:20:10,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 95 SyntacticMatches, 35 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2023-12-20 07:20:10,482 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 145 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:10,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 140 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:20:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-20 07:20:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2023-12-20 07:20:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-12-20 07:20:10,494 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2023-12-20 07:20:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:10,494 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-12-20 07:20:10,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-12-20 07:20:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-20 07:20:10,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:10,495 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:10,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-20 07:20:10,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-20 07:20:10,702 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:10,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1081090778, now seen corresponding path program 33 times [2023-12-20 07:20:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:10,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954396279] [2023-12-20 07:20:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:11,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954396279] [2023-12-20 07:20:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954396279] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71006006] [2023-12-20 07:20:11,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:20:11,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:11,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:11,825 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:11,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-20 07:20:13,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-12-20 07:20:13,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:20:13,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 126 conjunts are in the unsatisfiable core [2023-12-20 07:20:13,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:13,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:20:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:14,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:16,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:20:16,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 07:20:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:17,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71006006] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:17,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:17,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 42] total 119 [2023-12-20 07:20:17,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654917844] [2023-12-20 07:20:17,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:17,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-12-20 07:20:17,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-12-20 07:20:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=13057, Unknown=0, NotChecked=0, Total=14042 [2023-12-20 07:20:17,133 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 119 states, 119 states have (on average 1.8739495798319328) internal successors, (223), 119 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:25,977 INFO L93 Difference]: Finished difference Result 198 states and 219 transitions. [2023-12-20 07:20:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-12-20 07:20:25,977 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.8739495798319328) internal successors, (223), 119 states have internal predecessors, (223), 0 states have call successors, (0), 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 76 [2023-12-20 07:20:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:25,978 INFO L225 Difference]: With dead ends: 198 [2023-12-20 07:20:25,978 INFO L226 Difference]: Without dead ends: 196 [2023-12-20 07:20:25,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11392 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=3520, Invalid=42062, Unknown=0, NotChecked=0, Total=45582 [2023-12-20 07:20:25,981 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 344 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 3996 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 4211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:25,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1322 Invalid, 4211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3996 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-20 07:20:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-12-20 07:20:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 136. [2023-12-20 07:20:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2023-12-20 07:20:26,013 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 76 [2023-12-20 07:20:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:26,013 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2023-12-20 07:20:26,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.8739495798319328) internal successors, (223), 119 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2023-12-20 07:20:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-20 07:20:26,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:26,014 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:26,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-20 07:20:26,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-20 07:20:26,215 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:26,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1264793027, now seen corresponding path program 34 times [2023-12-20 07:20:26,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:26,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675565997] [2023-12-20 07:20:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:26,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:27,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675565997] [2023-12-20 07:20:27,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675565997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795928707] [2023-12-20 07:20:27,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:20:27,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:27,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:27,430 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:27,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-20 07:20:27,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:20:27,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:20:27,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-20 07:20:27,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:28,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:20:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:29,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:30,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:20:30,002 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 16 treesize of output 12 [2023-12-20 07:20:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:30,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795928707] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:30,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:30,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 85 [2023-12-20 07:20:30,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358173175] [2023-12-20 07:20:30,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:30,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-12-20 07:20:30,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:30,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-12-20 07:20:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=6883, Unknown=0, NotChecked=0, Total=7140 [2023-12-20 07:20:30,023 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 85 states, 85 states have (on average 1.9058823529411764) internal successors, (162), 85 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:31,792 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2023-12-20 07:20:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-20 07:20:31,792 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9058823529411764) internal successors, (162), 85 states have internal predecessors, (162), 0 states have call successors, (0), 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 80 [2023-12-20 07:20:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:31,793 INFO L225 Difference]: With dead ends: 200 [2023-12-20 07:20:31,793 INFO L226 Difference]: Without dead ends: 198 [2023-12-20 07:20:31,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=437, Invalid=11119, Unknown=0, NotChecked=0, Total=11556 [2023-12-20 07:20:31,794 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 3778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:31,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1326 Invalid, 3778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-20 07:20:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-20 07:20:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 136. [2023-12-20 07:20:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2023-12-20 07:20:31,827 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 80 [2023-12-20 07:20:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:31,827 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2023-12-20 07:20:31,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.9058823529411764) internal successors, (162), 85 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2023-12-20 07:20:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-20 07:20:31,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:31,828 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:31,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-20 07:20:32,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-20 07:20:32,035 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:32,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:32,035 INFO L85 PathProgramCache]: Analyzing trace with hash 303813920, now seen corresponding path program 35 times [2023-12-20 07:20:32,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:32,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494892180] [2023-12-20 07:20:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:32,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:32,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:32,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494892180] [2023-12-20 07:20:32,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494892180] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:32,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809806478] [2023-12-20 07:20:32,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:20:32,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:32,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:32,783 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:32,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-20 07:20:33,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-12-20 07:20:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:20:33,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-20 07:20:33,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:33,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:34,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809806478] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:34,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:34,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-12-20 07:20:34,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277076397] [2023-12-20 07:20:34,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:34,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-20 07:20:34,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:34,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-20 07:20:34,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 07:20:34,533 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:35,132 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2023-12-20 07:20:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-20 07:20:35,132 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 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 83 [2023-12-20 07:20:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:35,133 INFO L225 Difference]: With dead ends: 263 [2023-12-20 07:20:35,133 INFO L226 Difference]: Without dead ends: 91 [2023-12-20 07:20:35,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 105 SyntacticMatches, 39 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4260 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2374, Invalid=8546, Unknown=0, NotChecked=0, Total=10920 [2023-12-20 07:20:35,135 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 288 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:35,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 193 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:20:35,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-20 07:20:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2023-12-20 07:20:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-12-20 07:20:35,164 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2023-12-20 07:20:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:35,164 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-12-20 07:20:35,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-12-20 07:20:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-20 07:20:35,165 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:35,165 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:35,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-20 07:20:35,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:35,365 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:35,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash -983513350, now seen corresponding path program 36 times [2023-12-20 07:20:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:35,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628373332] [2023-12-20 07:20:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:35,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:36,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:36,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628373332] [2023-12-20 07:20:36,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628373332] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:36,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254988443] [2023-12-20 07:20:36,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:20:36,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:36,819 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:36,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-20 07:20:38,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-12-20 07:20:38,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:20:38,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-20 07:20:38,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:38,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:20:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:38,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:39,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:20:39,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 07:20:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:39,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254988443] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:39,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:39,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 67 [2023-12-20 07:20:39,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515166185] [2023-12-20 07:20:39,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-12-20 07:20:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-12-20 07:20:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=4244, Unknown=0, NotChecked=0, Total=4422 [2023-12-20 07:20:39,355 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:41,237 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2023-12-20 07:20:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-20 07:20:41,237 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 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 84 [2023-12-20 07:20:41,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:41,237 INFO L225 Difference]: With dead ends: 91 [2023-12-20 07:20:41,237 INFO L226 Difference]: Without dead ends: 89 [2023-12-20 07:20:41,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=333, Invalid=7499, Unknown=0, NotChecked=0, Total=7832 [2023-12-20 07:20:41,238 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 3562 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 3584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:41,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1065 Invalid, 3584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3562 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-20 07:20:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-20 07:20:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2023-12-20 07:20:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2023-12-20 07:20:41,265 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2023-12-20 07:20:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:41,265 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2023-12-20 07:20:41,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2023-12-20 07:20:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-20 07:20:41,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:41,266 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:41,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-20 07:20:41,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-20 07:20:41,466 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:41,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash 425476931, now seen corresponding path program 37 times [2023-12-20 07:20:41,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:41,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604323000] [2023-12-20 07:20:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:41,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:42,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:42,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604323000] [2023-12-20 07:20:42,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604323000] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:42,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212596691] [2023-12-20 07:20:42,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:20:42,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:42,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:42,348 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:42,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-20 07:20:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:42,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-20 07:20:42,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:43,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:43,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212596691] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:43,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:43,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2023-12-20 07:20:43,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937815840] [2023-12-20 07:20:43,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-20 07:20:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-20 07:20:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2023-12-20 07:20:43,857 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:44,249 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2023-12-20 07:20:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-20 07:20:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 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 87 [2023-12-20 07:20:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:44,250 INFO L225 Difference]: With dead ends: 162 [2023-12-20 07:20:44,250 INFO L226 Difference]: Without dead ends: 95 [2023-12-20 07:20:44,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 110 SyntacticMatches, 41 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2023-12-20 07:20:44,251 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 253 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:44,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 167 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:20:44,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-20 07:20:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2023-12-20 07:20:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-12-20 07:20:44,279 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2023-12-20 07:20:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:44,279 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-12-20 07:20:44,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-12-20 07:20:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-20 07:20:44,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:44,280 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:44,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-20 07:20:44,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-20 07:20:44,487 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:44,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash -624904163, now seen corresponding path program 38 times [2023-12-20 07:20:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:44,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452974622] [2023-12-20 07:20:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:46,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452974622] [2023-12-20 07:20:46,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452974622] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452436730] [2023-12-20 07:20:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:20:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:46,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:46,137 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:46,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-20 07:20:46,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:20:46,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:20:46,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-20 07:20:46,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:46,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:20:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:47,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:48,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:20:48,727 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 16 treesize of output 12 [2023-12-20 07:20:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:49,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452436730] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:49,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:49,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 110 [2023-12-20 07:20:49,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694412108] [2023-12-20 07:20:49,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:49,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-12-20 07:20:49,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:49,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-12-20 07:20:49,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=11647, Unknown=0, NotChecked=0, Total=11990 [2023-12-20 07:20:49,846 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:52,256 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2023-12-20 07:20:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-20 07:20:52,256 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 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 88 [2023-12-20 07:20:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:52,257 INFO L225 Difference]: With dead ends: 95 [2023-12-20 07:20:52,257 INFO L226 Difference]: Without dead ends: 93 [2023-12-20 07:20:52,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=537, Invalid=16755, Unknown=0, NotChecked=0, Total=17292 [2023-12-20 07:20:52,259 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 4537 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 4560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:52,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1543 Invalid, 4560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4537 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-20 07:20:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-20 07:20:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2023-12-20 07:20:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2023-12-20 07:20:52,293 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2023-12-20 07:20:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:52,293 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2023-12-20 07:20:52,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2023-12-20 07:20:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-20 07:20:52,294 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:52,294 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:52,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-20 07:20:52,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:52,495 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:52,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:52,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2126865600, now seen corresponding path program 39 times [2023-12-20 07:20:52,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:52,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131226330] [2023-12-20 07:20:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:52,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:53,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131226330] [2023-12-20 07:20:53,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131226330] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662760788] [2023-12-20 07:20:53,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:20:53,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:53,387 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:53,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-20 07:20:55,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-12-20 07:20:55,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:20:55,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-20 07:20:55,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:20:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:56,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:20:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:57,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662760788] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:20:57,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:20:57,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2023-12-20 07:20:57,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320141354] [2023-12-20 07:20:57,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:20:57,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-12-20 07:20:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:20:57,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-12-20 07:20:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2023-12-20 07:20:57,396 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:20:57,814 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2023-12-20 07:20:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-20 07:20:57,815 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-12-20 07:20:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:20:57,815 INFO L225 Difference]: With dead ends: 169 [2023-12-20 07:20:57,815 INFO L226 Difference]: Without dead ends: 99 [2023-12-20 07:20:57,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 115 SyntacticMatches, 43 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3952 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2023-12-20 07:20:57,816 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 257 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:20:57,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 194 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:20:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-20 07:20:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2023-12-20 07:20:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-12-20 07:20:57,844 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2023-12-20 07:20:57,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:20:57,844 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-12-20 07:20:57,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:20:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-12-20 07:20:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 07:20:57,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:20:57,844 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-12-20 07:20:57,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-20 07:20:58,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-20 07:20:58,046 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:20:58,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:20:58,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1598362394, now seen corresponding path program 40 times [2023-12-20 07:20:58,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:20:58,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553953771] [2023-12-20 07:20:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:20:58,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:20:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:20:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:20:59,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:20:59,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553953771] [2023-12-20 07:20:59,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553953771] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:20:59,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125256019] [2023-12-20 07:20:59,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:20:59,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:20:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:20:59,430 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:20:59,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-20 07:21:00,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:21:00,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:00,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-20 07:21:00,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:01,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:21:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:02,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:03,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:21:03,057 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 16 treesize of output 12 [2023-12-20 07:21:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:03,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125256019] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:03,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2023-12-20 07:21:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151629151] [2023-12-20 07:21:03,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:03,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-20 07:21:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-20 07:21:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9019, Unknown=0, NotChecked=0, Total=9312 [2023-12-20 07:21:03,084 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 97 states, 97 states have (on average 1.9175257731958764) internal successors, (186), 97 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:05,503 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2023-12-20 07:21:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-12-20 07:21:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9175257731958764) internal successors, (186), 97 states have internal predecessors, (186), 0 states have call successors, (0), 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 92 [2023-12-20 07:21:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:05,503 INFO L225 Difference]: With dead ends: 99 [2023-12-20 07:21:05,503 INFO L226 Difference]: Without dead ends: 97 [2023-12-20 07:21:05,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2538 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=487, Invalid=14033, Unknown=0, NotChecked=0, Total=14520 [2023-12-20 07:21:05,504 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 5604 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 5630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:05,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1767 Invalid, 5630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5604 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-20 07:21:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-20 07:21:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-12-20 07:21:05,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2023-12-20 07:21:05,534 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2023-12-20 07:21:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:05,534 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2023-12-20 07:21:05,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9175257731958764) internal successors, (186), 97 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2023-12-20 07:21:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-20 07:21:05,535 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:05,535 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:05,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-20 07:21:05,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:05,742 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:05,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1483537629, now seen corresponding path program 41 times [2023-12-20 07:21:05,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:05,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055041052] [2023-12-20 07:21:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:05,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:06,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055041052] [2023-12-20 07:21:06,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055041052] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438603689] [2023-12-20 07:21:06,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:21:06,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:06,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:06,626 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:06,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-20 07:21:07,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2023-12-20 07:21:07,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:07,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-20 07:21:07,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:08,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:08,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438603689] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:08,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:08,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2023-12-20 07:21:08,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975401209] [2023-12-20 07:21:08,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:08,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-20 07:21:08,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:08,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-20 07:21:08,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2023-12-20 07:21:08,797 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:09,227 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2023-12-20 07:21:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-20 07:21:09,227 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 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 95 [2023-12-20 07:21:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:09,228 INFO L225 Difference]: With dead ends: 176 [2023-12-20 07:21:09,228 INFO L226 Difference]: Without dead ends: 103 [2023-12-20 07:21:09,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 120 SyntacticMatches, 45 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2023-12-20 07:21:09,229 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 281 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:09,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 189 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:21:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-20 07:21:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2023-12-20 07:21:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-12-20 07:21:09,258 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2023-12-20 07:21:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:09,258 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-12-20 07:21:09,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-12-20 07:21:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-20 07:21:09,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:09,258 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:09,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-20 07:21:09,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:09,460 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:09,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash 160038397, now seen corresponding path program 42 times [2023-12-20 07:21:09,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:09,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639275387] [2023-12-20 07:21:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:10,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:10,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639275387] [2023-12-20 07:21:10,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639275387] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:10,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712093961] [2023-12-20 07:21:10,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:21:10,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:10,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:10,924 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:10,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-20 07:21:11,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2023-12-20 07:21:11,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:11,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 102 conjunts are in the unsatisfiable core [2023-12-20 07:21:11,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:11,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:21:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:13,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:13,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:21:13,240 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 16 treesize of output 12 [2023-12-20 07:21:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:13,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712093961] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:13,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:13,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 74 [2023-12-20 07:21:13,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541669134] [2023-12-20 07:21:13,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:13,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-20 07:21:13,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:13,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-20 07:21:13,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5210, Unknown=0, NotChecked=0, Total=5402 [2023-12-20 07:21:13,261 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 74 states, 74 states have (on average 2.2432432432432434) internal successors, (166), 74 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:15,248 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2023-12-20 07:21:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-12-20 07:21:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2432432432432434) internal successors, (166), 74 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 96 [2023-12-20 07:21:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:15,249 INFO L225 Difference]: With dead ends: 103 [2023-12-20 07:21:15,249 INFO L226 Difference]: Without dead ends: 101 [2023-12-20 07:21:15,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=358, Invalid=9148, Unknown=0, NotChecked=0, Total=9506 [2023-12-20 07:21:15,249 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 4279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:15,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1435 Invalid, 4279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-20 07:21:15,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-20 07:21:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2023-12-20 07:21:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2023-12-20 07:21:15,278 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2023-12-20 07:21:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:15,279 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2023-12-20 07:21:15,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2432432432432434) internal successors, (166), 74 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2023-12-20 07:21:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-20 07:21:15,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:15,279 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:15,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-20 07:21:15,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-20 07:21:15,481 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:15,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:15,482 INFO L85 PathProgramCache]: Analyzing trace with hash 294979936, now seen corresponding path program 43 times [2023-12-20 07:21:15,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:15,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874195985] [2023-12-20 07:21:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:15,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:16,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:16,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874195985] [2023-12-20 07:21:16,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874195985] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:16,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118127911] [2023-12-20 07:21:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:21:16,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:16,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:16,461 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:16,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-20 07:21:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:16,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-20 07:21:16,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:17,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:18,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118127911] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:18,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:18,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2023-12-20 07:21:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790333493] [2023-12-20 07:21:18,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:18,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-12-20 07:21:18,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:18,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-12-20 07:21:18,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4497, Unknown=0, NotChecked=0, Total=5852 [2023-12-20 07:21:18,302 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:18,776 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2023-12-20 07:21:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-20 07:21:18,776 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 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 99 [2023-12-20 07:21:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:18,777 INFO L225 Difference]: With dead ends: 183 [2023-12-20 07:21:18,777 INFO L226 Difference]: Without dead ends: 107 [2023-12-20 07:21:18,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 125 SyntacticMatches, 47 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4673 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2327, Invalid=7773, Unknown=0, NotChecked=0, Total=10100 [2023-12-20 07:21:18,778 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 273 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:18,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 240 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:21:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-20 07:21:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2023-12-20 07:21:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-12-20 07:21:18,810 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2023-12-20 07:21:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:18,810 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-12-20 07:21:18,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-12-20 07:21:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-20 07:21:18,810 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:18,810 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:18,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-20 07:21:19,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-20 07:21:19,011 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:19,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1467942714, now seen corresponding path program 44 times [2023-12-20 07:21:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:19,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818608351] [2023-12-20 07:21:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818608351] [2023-12-20 07:21:20,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818608351] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:20,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512522399] [2023-12-20 07:21:20,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:21:20,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:20,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:20,518 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:20,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-20 07:21:20,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:21:20,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:20,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-20 07:21:20,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:21,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:21:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:23,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:23,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:21:23,776 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 16 treesize of output 12 [2023-12-20 07:21:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:23,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512522399] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:23,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:23,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 103 [2023-12-20 07:21:23,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666072891] [2023-12-20 07:21:23,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:23,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-12-20 07:21:23,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:23,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-12-20 07:21:23,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=10202, Unknown=0, NotChecked=0, Total=10506 [2023-12-20 07:21:23,801 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 103 states, 103 states have (on average 1.9611650485436893) internal successors, (202), 103 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:26,334 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2023-12-20 07:21:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-12-20 07:21:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9611650485436893) internal successors, (202), 103 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-12-20 07:21:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:26,335 INFO L225 Difference]: With dead ends: 107 [2023-12-20 07:21:26,335 INFO L226 Difference]: Without dead ends: 105 [2023-12-20 07:21:26,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2778 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=503, Invalid=15753, Unknown=0, NotChecked=0, Total=16256 [2023-12-20 07:21:26,336 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 5555 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 5580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 5555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:26,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1847 Invalid, 5580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 5555 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-20 07:21:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-20 07:21:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2023-12-20 07:21:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2023-12-20 07:21:26,379 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2023-12-20 07:21:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:26,379 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2023-12-20 07:21:26,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9611650485436893) internal successors, (202), 103 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2023-12-20 07:21:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-20 07:21:26,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:26,380 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:26,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-20 07:21:26,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-20 07:21:26,581 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:26,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash 129178371, now seen corresponding path program 45 times [2023-12-20 07:21:26,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:26,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009485881] [2023-12-20 07:21:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:26,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:27,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009485881] [2023-12-20 07:21:27,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009485881] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031706325] [2023-12-20 07:21:27,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:21:27,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:27,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:27,644 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:27,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-20 07:21:31,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2023-12-20 07:21:31,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:31,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-20 07:21:31,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:32,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:33,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031706325] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:33,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:33,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2023-12-20 07:21:33,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429844773] [2023-12-20 07:21:33,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:33,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-12-20 07:21:33,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:33,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-12-20 07:21:33,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=4859, Unknown=0, NotChecked=0, Total=6320 [2023-12-20 07:21:33,625 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:34,176 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2023-12-20 07:21:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-20 07:21:34,176 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-20 07:21:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:34,177 INFO L225 Difference]: With dead ends: 190 [2023-12-20 07:21:34,177 INFO L226 Difference]: Without dead ends: 111 [2023-12-20 07:21:34,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 130 SyntacticMatches, 49 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2511, Invalid=8409, Unknown=0, NotChecked=0, Total=10920 [2023-12-20 07:21:34,178 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 377 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:34,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 315 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:21:34,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-20 07:21:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2023-12-20 07:21:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-12-20 07:21:34,215 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2023-12-20 07:21:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:34,215 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-12-20 07:21:34,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-12-20 07:21:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-20 07:21:34,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:34,216 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:34,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-20 07:21:34,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:34,421 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:34,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:34,421 INFO L85 PathProgramCache]: Analyzing trace with hash 710319069, now seen corresponding path program 46 times [2023-12-20 07:21:34,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:34,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515843775] [2023-12-20 07:21:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:34,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:36,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:36,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515843775] [2023-12-20 07:21:36,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515843775] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:36,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225730803] [2023-12-20 07:21:36,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:21:36,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:36,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:36,402 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:36,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-20 07:21:37,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:21:37,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:37,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 115 conjunts are in the unsatisfiable core [2023-12-20 07:21:37,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:39,013 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 [2023-12-20 07:21:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:40,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:42,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:21:42,899 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 16 treesize of output 12 [2023-12-20 07:21:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:42,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225730803] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:42,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:42,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 133 [2023-12-20 07:21:42,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897011289] [2023-12-20 07:21:42,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:42,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-12-20 07:21:42,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-12-20 07:21:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=17181, Unknown=0, NotChecked=0, Total=17556 [2023-12-20 07:21:42,925 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 133 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:48,701 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2023-12-20 07:21:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-12-20 07:21:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 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 104 [2023-12-20 07:21:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:48,701 INFO L225 Difference]: With dead ends: 111 [2023-12-20 07:21:48,701 INFO L226 Difference]: Without dead ends: 109 [2023-12-20 07:21:48,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4315 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=819, Invalid=33221, Unknown=0, NotChecked=0, Total=34040 [2023-12-20 07:21:48,704 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 85 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 7749 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 7776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 7749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:48,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 2348 Invalid, 7776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 7749 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-20 07:21:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-20 07:21:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2023-12-20 07:21:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2023-12-20 07:21:48,749 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2023-12-20 07:21:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:48,750 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2023-12-20 07:21:48,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.1052631578947367) internal successors, (280), 133 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2023-12-20 07:21:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-20 07:21:48,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:48,751 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:48,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-12-20 07:21:48,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-20 07:21:48,960 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:48,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash -183689344, now seen corresponding path program 47 times [2023-12-20 07:21:48,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:48,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188877733] [2023-12-20 07:21:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:48,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:50,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:50,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188877733] [2023-12-20 07:21:50,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188877733] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:50,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362706013] [2023-12-20 07:21:50,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:21:50,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:50,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:50,083 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:50,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-20 07:21:50,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-12-20 07:21:50,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:50,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-20 07:21:50,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:51,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:52,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362706013] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:52,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:52,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2023-12-20 07:21:52,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821187814] [2023-12-20 07:21:52,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:52,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-12-20 07:21:52,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-12-20 07:21:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2023-12-20 07:21:52,731 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:21:53,250 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2023-12-20 07:21:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-20 07:21:53,250 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 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 107 [2023-12-20 07:21:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:21:53,251 INFO L225 Difference]: With dead ends: 197 [2023-12-20 07:21:53,251 INFO L226 Difference]: Without dead ends: 115 [2023-12-20 07:21:53,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 135 SyntacticMatches, 51 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5454 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2702, Invalid=9070, Unknown=0, NotChecked=0, Total=11772 [2023-12-20 07:21:53,252 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 297 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:21:53,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 238 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:21:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-20 07:21:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2023-12-20 07:21:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-12-20 07:21:53,283 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2023-12-20 07:21:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:21:53,283 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-12-20 07:21:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:21:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-12-20 07:21:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-20 07:21:53,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:21:53,284 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-12-20 07:21:53,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-12-20 07:21:53,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-20 07:21:53,484 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:21:53,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:21:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 636527450, now seen corresponding path program 48 times [2023-12-20 07:21:53,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:21:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621230197] [2023-12-20 07:21:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:21:53,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:21:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:21:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:55,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:21:55,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621230197] [2023-12-20 07:21:55,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621230197] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:21:55,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087265211] [2023-12-20 07:21:55,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:21:55,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:21:55,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:21:55,288 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:21:55,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-20 07:21:57,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2023-12-20 07:21:57,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:21:57,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 119 conjunts are in the unsatisfiable core [2023-12-20 07:21:57,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:21:57,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:21:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:59,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:21:59,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:21:59,784 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 16 treesize of output 12 [2023-12-20 07:21:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:21:59,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087265211] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:21:59,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:21:59,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 85 [2023-12-20 07:21:59,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461202285] [2023-12-20 07:21:59,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:21:59,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-12-20 07:21:59,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:21:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-12-20 07:21:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=6914, Unknown=0, NotChecked=0, Total=7140 [2023-12-20 07:21:59,808 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:22:02,443 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2023-12-20 07:22:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-20 07:22:02,443 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 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 108 [2023-12-20 07:22:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:22:02,444 INFO L225 Difference]: With dead ends: 115 [2023-12-20 07:22:02,444 INFO L226 Difference]: Without dead ends: 113 [2023-12-20 07:22:02,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=423, Invalid=12233, Unknown=0, NotChecked=0, Total=12656 [2023-12-20 07:22:02,445 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 5575 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 5604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 5575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-20 07:22:02,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1715 Invalid, 5604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 5575 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-20 07:22:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-20 07:22:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2023-12-20 07:22:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-12-20 07:22:02,491 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2023-12-20 07:22:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:22:02,491 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-12-20 07:22:02,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-12-20 07:22:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-20 07:22:02,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:22:02,492 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2023-12-20 07:22:02,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-12-20 07:22:02,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:02,692 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:22:02,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:22:02,693 INFO L85 PathProgramCache]: Analyzing trace with hash 513444579, now seen corresponding path program 49 times [2023-12-20 07:22:02,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:22:02,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219794434] [2023-12-20 07:22:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:22:02,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:22:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:22:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:03,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:22:03,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219794434] [2023-12-20 07:22:03,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219794434] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:22:03,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398291122] [2023-12-20 07:22:03,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:22:03,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:03,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:22:03,891 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:22:03,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-20 07:22:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:22:04,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-20 07:22:04,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:22:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:05,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:22:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398291122] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:22:06,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:22:06,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2023-12-20 07:22:06,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648821943] [2023-12-20 07:22:06,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:22:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-12-20 07:22:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:22:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-12-20 07:22:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=5625, Unknown=0, NotChecked=0, Total=7310 [2023-12-20 07:22:06,154 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:06,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:22:06,720 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2023-12-20 07:22:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-20 07:22:06,721 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 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 111 [2023-12-20 07:22:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:22:06,722 INFO L225 Difference]: With dead ends: 204 [2023-12-20 07:22:06,722 INFO L226 Difference]: Without dead ends: 119 [2023-12-20 07:22:06,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 140 SyntacticMatches, 53 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5867 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2900, Invalid=9756, Unknown=0, NotChecked=0, Total=12656 [2023-12-20 07:22:06,724 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 461 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:22:06,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 231 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:22:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-20 07:22:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2023-12-20 07:22:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-12-20 07:22:06,772 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2023-12-20 07:22:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:22:06,772 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-12-20 07:22:06,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-12-20 07:22:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-20 07:22:06,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:22:06,773 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2023-12-20 07:22:06,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-12-20 07:22:06,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-12-20 07:22:06,976 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:22:06,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:22:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1745129917, now seen corresponding path program 50 times [2023-12-20 07:22:06,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:22:06,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240950262] [2023-12-20 07:22:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:22:06,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:22:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:22:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:08,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:22:08,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240950262] [2023-12-20 07:22:08,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240950262] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:22:08,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234037581] [2023-12-20 07:22:08,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:22:08,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:08,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:22:08,958 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:22:08,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-20 07:22:09,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:22:09,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:22:09,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-20 07:22:09,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:22:10,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:22:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:12,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:22:12,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:22:12,871 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 16 treesize of output 12 [2023-12-20 07:22:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:12,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234037581] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:22:12,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:22:12,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2023-12-20 07:22:12,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727647224] [2023-12-20 07:22:12,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:22:12,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-12-20 07:22:12,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:22:12,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-12-20 07:22:12,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=12770, Unknown=0, NotChecked=0, Total=13110 [2023-12-20 07:22:12,898 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 115 states, 115 states have (on average 1.9652173913043478) internal successors, (226), 115 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:22:16,080 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2023-12-20 07:22:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-12-20 07:22:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9652173913043478) internal successors, (226), 115 states have internal predecessors, (226), 0 states have call successors, (0), 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 112 [2023-12-20 07:22:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:22:16,081 INFO L225 Difference]: With dead ends: 119 [2023-12-20 07:22:16,082 INFO L226 Difference]: Without dead ends: 117 [2023-12-20 07:22:16,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3489 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=563, Invalid=19743, Unknown=0, NotChecked=0, Total=20306 [2023-12-20 07:22:16,083 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 2500 mSDsCounter, 0 mSdLazyCounter, 7286 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 7315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 7286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:22:16,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2531 Invalid, 7315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 7286 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-20 07:22:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-20 07:22:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2023-12-20 07:22:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2023-12-20 07:22:16,127 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2023-12-20 07:22:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:22:16,127 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2023-12-20 07:22:16,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9652173913043478) internal successors, (226), 115 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2023-12-20 07:22:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-20 07:22:16,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:22:16,127 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2023-12-20 07:22:16,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-20 07:22:16,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:16,328 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:22:16,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:22:16,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1408967264, now seen corresponding path program 51 times [2023-12-20 07:22:16,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:22:16,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437942022] [2023-12-20 07:22:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:22:16,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:22:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:22:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:17,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:22:17,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437942022] [2023-12-20 07:22:17,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437942022] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:22:17,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437380976] [2023-12-20 07:22:17,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:22:17,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:17,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:22:17,612 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:22:17,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-20 07:22:22,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2023-12-20 07:22:22,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:22:22,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-20 07:22:22,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:22:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:23,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:22:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:24,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437380976] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:22:24,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:22:24,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2023-12-20 07:22:24,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663551830] [2023-12-20 07:22:24,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:22:24,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-12-20 07:22:24,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:22:24,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-12-20 07:22:24,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=6029, Unknown=0, NotChecked=0, Total=7832 [2023-12-20 07:22:24,795 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:22:25,371 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2023-12-20 07:22:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-20 07:22:25,371 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 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 115 [2023-12-20 07:22:25,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:22:25,372 INFO L225 Difference]: With dead ends: 211 [2023-12-20 07:22:25,372 INFO L226 Difference]: Without dead ends: 123 [2023-12-20 07:22:25,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 145 SyntacticMatches, 55 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3105, Invalid=10467, Unknown=0, NotChecked=0, Total=13572 [2023-12-20 07:22:25,373 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 299 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:22:25,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 277 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:22:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-20 07:22:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2023-12-20 07:22:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-12-20 07:22:25,408 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2023-12-20 07:22:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:22:25,408 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-12-20 07:22:25,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-12-20 07:22:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-20 07:22:25,409 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:22:25,409 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-12-20 07:22:25,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-20 07:22:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-12-20 07:22:25,609 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:22:25,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:22:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1862539398, now seen corresponding path program 52 times [2023-12-20 07:22:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:22:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343959012] [2023-12-20 07:22:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:22:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:22:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:22:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:27,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:22:27,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343959012] [2023-12-20 07:22:27,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343959012] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:22:27,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896377214] [2023-12-20 07:22:27,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:22:27,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:27,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:22:27,748 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:22:27,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-20 07:22:28,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:22:28,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:22:28,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-20 07:22:28,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:22:28,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:22:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:30,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:22:30,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:22:30,727 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 16 treesize of output 12 [2023-12-20 07:22:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:30,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896377214] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:22:30,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:22:30,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 61, 61] total 91 [2023-12-20 07:22:30,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983362969] [2023-12-20 07:22:30,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:22:30,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-12-20 07:22:30,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:22:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-12-20 07:22:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=7948, Unknown=0, NotChecked=0, Total=8190 [2023-12-20 07:22:30,759 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 91 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:22:33,916 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2023-12-20 07:22:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-12-20 07:22:33,916 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 91 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 116 [2023-12-20 07:22:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:22:33,919 INFO L225 Difference]: With dead ends: 123 [2023-12-20 07:22:33,919 INFO L226 Difference]: Without dead ends: 121 [2023-12-20 07:22:33,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=453, Invalid=14067, Unknown=0, NotChecked=0, Total=14520 [2023-12-20 07:22:33,920 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 6633 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 6663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 6633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:22:33,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2072 Invalid, 6663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 6633 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 07:22:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-20 07:22:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2023-12-20 07:22:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2023-12-20 07:22:33,971 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2023-12-20 07:22:33,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:22:33,971 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2023-12-20 07:22:33,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 91 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2023-12-20 07:22:33,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-20 07:22:33,972 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:22:33,972 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2023-12-20 07:22:33,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-12-20 07:22:34,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-12-20 07:22:34,182 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:22:34,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:22:34,182 INFO L85 PathProgramCache]: Analyzing trace with hash -223915325, now seen corresponding path program 53 times [2023-12-20 07:22:34,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:22:34,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278630782] [2023-12-20 07:22:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:22:34,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:22:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:22:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:22:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278630782] [2023-12-20 07:22:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278630782] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:22:35,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253110996] [2023-12-20 07:22:35,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:22:35,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:35,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:22:35,549 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:22:35,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-20 07:22:36,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2023-12-20 07:22:36,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:22:36,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-20 07:22:36,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:22:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:38,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:22:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:39,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253110996] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:22:39,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:22:39,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2023-12-20 07:22:39,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172332740] [2023-12-20 07:22:39,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:22:39,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-12-20 07:22:39,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:22:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-12-20 07:22:39,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1925, Invalid=6447, Unknown=0, NotChecked=0, Total=8372 [2023-12-20 07:22:39,211 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:39,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:22:39,868 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2023-12-20 07:22:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-20 07:22:39,868 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 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 119 [2023-12-20 07:22:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:22:39,870 INFO L225 Difference]: With dead ends: 218 [2023-12-20 07:22:39,870 INFO L226 Difference]: Without dead ends: 127 [2023-12-20 07:22:39,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 150 SyntacticMatches, 57 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6738 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3317, Invalid=11203, Unknown=0, NotChecked=0, Total=14520 [2023-12-20 07:22:39,872 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 313 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:22:39,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 269 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:22:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-20 07:22:39,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-12-20 07:22:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-12-20 07:22:39,917 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2023-12-20 07:22:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:22:39,917 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-12-20 07:22:39,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-12-20 07:22:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-20 07:22:39,918 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:22:39,918 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2023-12-20 07:22:39,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-12-20 07:22:40,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:40,118 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:22:40,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:22:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash 250732445, now seen corresponding path program 54 times [2023-12-20 07:22:40,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:22:40,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186897554] [2023-12-20 07:22:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:22:40,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:22:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:22:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:42,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:22:42,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186897554] [2023-12-20 07:22:42,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186897554] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:22:42,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571420055] [2023-12-20 07:22:42,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:22:42,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:42,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:22:42,678 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:22:42,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-12-20 07:22:46,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-12-20 07:22:46,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:22:46,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 126 conjunts are in the unsatisfiable core [2023-12-20 07:22:46,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:22:48,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:22:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:50,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:22:53,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:22:53,025 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 16 treesize of output 12 [2023-12-20 07:22:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:22:53,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571420055] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:22:53,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:22:53,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 151 [2023-12-20 07:22:53,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172615753] [2023-12-20 07:22:53,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:22:53,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-12-20 07:22:53,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:22:53,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-12-20 07:22:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=22230, Unknown=0, NotChecked=0, Total=22650 [2023-12-20 07:22:53,054 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 151 states, 151 states have (on average 2.1456953642384105) internal successors, (324), 151 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:22:59,755 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2023-12-20 07:22:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-20 07:22:59,756 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.1456953642384105) internal successors, (324), 151 states have internal predecessors, (324), 0 states have call successors, (0), 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 120 [2023-12-20 07:22:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:22:59,756 INFO L225 Difference]: With dead ends: 127 [2023-12-20 07:22:59,756 INFO L226 Difference]: Without dead ends: 125 [2023-12-20 07:22:59,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5339 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=911, Invalid=42561, Unknown=0, NotChecked=0, Total=43472 [2023-12-20 07:22:59,758 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 104 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 7872 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 7903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 7872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:22:59,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 2680 Invalid, 7903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 7872 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-20 07:22:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-20 07:22:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2023-12-20 07:22:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2023-12-20 07:22:59,794 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2023-12-20 07:22:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:22:59,794 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2023-12-20 07:22:59,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.1456953642384105) internal successors, (324), 151 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:22:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2023-12-20 07:22:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-20 07:22:59,795 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:22:59,795 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2023-12-20 07:22:59,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-12-20 07:22:59,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:22:59,996 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:22:59,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:22:59,996 INFO L85 PathProgramCache]: Analyzing trace with hash 626934720, now seen corresponding path program 55 times [2023-12-20 07:22:59,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:22:59,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651184958] [2023-12-20 07:22:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:22:59,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:23:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:23:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:01,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:23:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651184958] [2023-12-20 07:23:01,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651184958] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:23:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379783368] [2023-12-20 07:23:01,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:23:01,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:23:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:23:01,456 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:23:01,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-12-20 07:23:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:23:01,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-20 07:23:01,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:23:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:03,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:23:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:04,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379783368] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:23:04,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:23:04,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2023-12-20 07:23:04,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160520371] [2023-12-20 07:23:04,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:23:04,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-12-20 07:23:04,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:23:04,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-12-20 07:23:04,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=6879, Unknown=0, NotChecked=0, Total=8930 [2023-12-20 07:23:04,193 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:23:04,849 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2023-12-20 07:23:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-20 07:23:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 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 123 [2023-12-20 07:23:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:23:04,850 INFO L225 Difference]: With dead ends: 225 [2023-12-20 07:23:04,850 INFO L226 Difference]: Without dead ends: 131 [2023-12-20 07:23:04,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 155 SyntacticMatches, 59 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7196 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3536, Invalid=11964, Unknown=0, NotChecked=0, Total=15500 [2023-12-20 07:23:04,852 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 431 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:23:04,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 305 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:23:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-20 07:23:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2023-12-20 07:23:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2023-12-20 07:23:04,890 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2023-12-20 07:23:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:23:04,890 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2023-12-20 07:23:04,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2023-12-20 07:23:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-20 07:23:04,891 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:23:04,891 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-12-20 07:23:04,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-12-20 07:23:05,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:23:05,098 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:23:05,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:23:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash -847064166, now seen corresponding path program 56 times [2023-12-20 07:23:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:23:05,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746744588] [2023-12-20 07:23:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:23:05,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:23:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:23:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:07,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:23:07,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746744588] [2023-12-20 07:23:07,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746744588] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:23:07,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075463015] [2023-12-20 07:23:07,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:23:07,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:23:07,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:23:07,363 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:23:07,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-12-20 07:23:07,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:23:07,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:23:07,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 132 conjunts are in the unsatisfiable core [2023-12-20 07:23:07,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:23:09,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:23:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:11,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:23:11,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:23:11,984 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 16 treesize of output 12 [2023-12-20 07:23:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:12,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075463015] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:23:12,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:23:12,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2023-12-20 07:23:12,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601000054] [2023-12-20 07:23:12,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:23:12,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-12-20 07:23:12,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:23:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-12-20 07:23:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=15626, Unknown=0, NotChecked=0, Total=16002 [2023-12-20 07:23:12,013 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 127 states, 127 states have (on average 1.968503937007874) internal successors, (250), 127 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:15,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:23:15,769 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2023-12-20 07:23:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-12-20 07:23:15,769 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.968503937007874) internal successors, (250), 127 states have internal predecessors, (250), 0 states have call successors, (0), 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 124 [2023-12-20 07:23:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:23:15,770 INFO L225 Difference]: With dead ends: 131 [2023-12-20 07:23:15,770 INFO L226 Difference]: Without dead ends: 129 [2023-12-20 07:23:15,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4281 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=623, Invalid=24183, Unknown=0, NotChecked=0, Total=24806 [2023-12-20 07:23:15,771 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 2821 mSDsCounter, 0 mSdLazyCounter, 8623 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 8654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 8623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-20 07:23:15,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2855 Invalid, 8654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 8623 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-20 07:23:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-20 07:23:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2023-12-20 07:23:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2023-12-20 07:23:15,811 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2023-12-20 07:23:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:23:15,811 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2023-12-20 07:23:15,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.968503937007874) internal successors, (250), 127 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2023-12-20 07:23:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-20 07:23:15,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:23:15,812 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2023-12-20 07:23:15,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-12-20 07:23:16,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-12-20 07:23:16,012 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:23:16,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:23:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1950911837, now seen corresponding path program 57 times [2023-12-20 07:23:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:23:16,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759297650] [2023-12-20 07:23:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:23:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:23:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:23:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:17,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:23:17,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759297650] [2023-12-20 07:23:17,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759297650] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:23:17,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140305693] [2023-12-20 07:23:17,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:23:17,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:23:17,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:23:17,559 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:23:17,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-12-20 07:23:32,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2023-12-20 07:23:32,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:23:32,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-20 07:23:32,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:23:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:34,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:23:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:35,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140305693] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:23:35,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:23:35,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2023-12-20 07:23:35,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831147798] [2023-12-20 07:23:35,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:23:35,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-12-20 07:23:35,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:23:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-12-20 07:23:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=7325, Unknown=0, NotChecked=0, Total=9506 [2023-12-20 07:23:35,573 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:23:36,245 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2023-12-20 07:23:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-20 07:23:36,245 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 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 127 [2023-12-20 07:23:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:23:36,246 INFO L225 Difference]: With dead ends: 232 [2023-12-20 07:23:36,246 INFO L226 Difference]: Without dead ends: 135 [2023-12-20 07:23:36,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 160 SyntacticMatches, 61 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7669 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3762, Invalid=12750, Unknown=0, NotChecked=0, Total=16512 [2023-12-20 07:23:36,248 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 299 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:23:36,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 297 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:23:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-20 07:23:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2023-12-20 07:23:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-12-20 07:23:36,294 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2023-12-20 07:23:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:23:36,294 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-12-20 07:23:36,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-12-20 07:23:36,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-20 07:23:36,294 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:23:36,294 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2023-12-20 07:23:36,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-12-20 07:23:36,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-12-20 07:23:36,495 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:23:36,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:23:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1828488573, now seen corresponding path program 58 times [2023-12-20 07:23:36,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:23:36,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464405184] [2023-12-20 07:23:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:23:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:23:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:23:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:38,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:23:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464405184] [2023-12-20 07:23:38,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464405184] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:23:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645871253] [2023-12-20 07:23:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:23:38,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:23:38,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:23:38,898 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:23:38,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-12-20 07:23:41,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:23:41,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:23:41,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 139 conjunts are in the unsatisfiable core [2023-12-20 07:23:41,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:23:42,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:23:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:44,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:23:44,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:23:44,456 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 16 treesize of output 12 [2023-12-20 07:23:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:44,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645871253] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:23:44,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:23:44,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 67, 67] total 100 [2023-12-20 07:23:44,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501700385] [2023-12-20 07:23:44,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:23:44,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-12-20 07:23:44,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:23:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-12-20 07:23:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=9634, Unknown=0, NotChecked=0, Total=9900 [2023-12-20 07:23:44,486 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 100 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:23:48,013 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2023-12-20 07:23:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-12-20 07:23:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 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 128 [2023-12-20 07:23:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:23:48,014 INFO L225 Difference]: With dead ends: 135 [2023-12-20 07:23:48,014 INFO L226 Difference]: Without dead ends: 133 [2023-12-20 07:23:48,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=498, Invalid=17058, Unknown=0, NotChecked=0, Total=17556 [2023-12-20 07:23:48,015 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 2357 mSDsCounter, 0 mSdLazyCounter, 7442 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 7475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 7442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:23:48,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2391 Invalid, 7475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 7442 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-20 07:23:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-20 07:23:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2023-12-20 07:23:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2023-12-20 07:23:48,061 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2023-12-20 07:23:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:23:48,061 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2023-12-20 07:23:48,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2023-12-20 07:23:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-20 07:23:48,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:23:48,062 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2023-12-20 07:23:48,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-12-20 07:23:48,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:23:48,264 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:23:48,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:23:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash -562343456, now seen corresponding path program 59 times [2023-12-20 07:23:48,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:23:48,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619551080] [2023-12-20 07:23:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:23:48,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:23:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:23:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:50,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:23:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619551080] [2023-12-20 07:23:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619551080] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:23:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497219356] [2023-12-20 07:23:50,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:23:50,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:23:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:23:50,008 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:23:50,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-12-20 07:23:54,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2023-12-20 07:23:54,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:23:54,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-20 07:23:54,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:23:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:55,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:23:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:23:56,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497219356] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:23:56,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:23:56,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2023-12-20 07:23:56,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944289666] [2023-12-20 07:23:56,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:23:56,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-12-20 07:23:56,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:23:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-12-20 07:23:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2315, Invalid=7785, Unknown=0, NotChecked=0, Total=10100 [2023-12-20 07:23:56,851 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:23:57,559 INFO L93 Difference]: Finished difference Result 239 states and 241 transitions. [2023-12-20 07:23:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-12-20 07:23:57,559 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 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 131 [2023-12-20 07:23:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:23:57,560 INFO L225 Difference]: With dead ends: 239 [2023-12-20 07:23:57,560 INFO L226 Difference]: Without dead ends: 139 [2023-12-20 07:23:57,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 165 SyntacticMatches, 63 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8157 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3995, Invalid=13561, Unknown=0, NotChecked=0, Total=17556 [2023-12-20 07:23:57,562 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 343 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:23:57,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 316 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:23:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-20 07:23:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 133. [2023-12-20 07:23:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-12-20 07:23:57,611 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2023-12-20 07:23:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:23:57,611 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-12-20 07:23:57,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:23:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-12-20 07:23:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-20 07:23:57,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:23:57,612 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-12-20 07:23:57,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-12-20 07:23:57,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:23:57,812 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:23:57,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:23:57,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1629001798, now seen corresponding path program 60 times [2023-12-20 07:23:57,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:23:57,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719513059] [2023-12-20 07:23:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:23:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:23:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:24:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:24:00,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:24:00,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719513059] [2023-12-20 07:24:00,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719513059] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:24:00,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699989011] [2023-12-20 07:24:00,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:24:00,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:24:00,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:24:00,355 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:24:00,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-12-20 07:24:06,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2023-12-20 07:24:06,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:24:06,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 180 conjunts are in the unsatisfiable core [2023-12-20 07:24:06,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:24:08,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:24:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:24:11,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:24:15,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:24:15,145 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 16 treesize of output 12 [2023-12-20 07:24:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:24:18,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699989011] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:24:18,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:24:18,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 70, 70] total 203 [2023-12-20 07:24:18,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438034214] [2023-12-20 07:24:18,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:24:18,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-12-20 07:24:18,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:24:18,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-12-20 07:24:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2384, Invalid=38622, Unknown=0, NotChecked=0, Total=41006 [2023-12-20 07:24:18,290 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 203 states, 203 states have (on average 1.9261083743842364) internal successors, (391), 203 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:24:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:24:51,026 INFO L93 Difference]: Finished difference Result 338 states and 373 transitions. [2023-12-20 07:24:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2023-12-20 07:24:51,026 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.9261083743842364) internal successors, (391), 203 states have internal predecessors, (391), 0 states have call successors, (0), 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 132 [2023-12-20 07:24:51,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:24:51,027 INFO L225 Difference]: With dead ends: 338 [2023-12-20 07:24:51,027 INFO L226 Difference]: Without dead ends: 336 [2023-12-20 07:24:51,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34068 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=8636, Invalid=126420, Unknown=0, NotChecked=0, Total=135056 [2023-12-20 07:24:51,033 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 879 mSDsluCounter, 4174 mSDsCounter, 0 mSdLazyCounter, 12624 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 4210 SdHoareTripleChecker+Invalid, 13147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 12624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-20 07:24:51,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 4210 Invalid, 13147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 12624 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-12-20 07:24:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-12-20 07:24:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 234. [2023-12-20 07:24:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:24:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2023-12-20 07:24:51,153 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 132 [2023-12-20 07:24:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:24:51,153 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2023-12-20 07:24:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.9261083743842364) internal successors, (391), 203 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:24:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2023-12-20 07:24:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-20 07:24:51,154 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:24:51,154 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2023-12-20 07:24:51,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-12-20 07:24:51,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:24:51,355 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:24:51,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:24:51,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1316846755, now seen corresponding path program 61 times [2023-12-20 07:24:51,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:24:51,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460492737] [2023-12-20 07:24:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:24:51,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:24:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:24:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:24:54,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:24:54,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460492737] [2023-12-20 07:24:54,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460492737] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:24:54,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900116837] [2023-12-20 07:24:54,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:24:54,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:24:54,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:24:54,514 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:24:54,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-12-20 07:24:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:24:54,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 144 conjunts are in the unsatisfiable core [2023-12-20 07:24:54,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:24:54,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:24:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:24:57,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:25:00,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:25:00,329 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 16 treesize of output 12 [2023-12-20 07:25:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900116837] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:25:03,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:25:03,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 170 [2023-12-20 07:25:03,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393510340] [2023-12-20 07:25:03,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:25:03,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2023-12-20 07:25:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:25:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2023-12-20 07:25:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=28195, Unknown=0, NotChecked=0, Total=28730 [2023-12-20 07:25:03,027 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand has 170 states, 170 states have (on average 2.1470588235294117) internal successors, (365), 170 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:25:09,180 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2023-12-20 07:25:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-12-20 07:25:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.1470588235294117) internal successors, (365), 170 states have internal predecessors, (365), 0 states have call successors, (0), 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 136 [2023-12-20 07:25:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:25:09,181 INFO L225 Difference]: With dead ends: 340 [2023-12-20 07:25:09,181 INFO L226 Difference]: Without dead ends: 338 [2023-12-20 07:25:09,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6799 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=842, Invalid=40978, Unknown=0, NotChecked=0, Total=41820 [2023-12-20 07:25:09,183 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 28 mSDsluCounter, 4288 mSDsCounter, 0 mSdLazyCounter, 11715 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 4331 SdHoareTripleChecker+Invalid, 11751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 11715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-20 07:25:09,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 4331 Invalid, 11751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 11715 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-20 07:25:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-12-20 07:25:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 234. [2023-12-20 07:25:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2023-12-20 07:25:09,311 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 136 [2023-12-20 07:25:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:25:09,311 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2023-12-20 07:25:09,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.1470588235294117) internal successors, (365), 170 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2023-12-20 07:25:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-20 07:25:09,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:25:09,312 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2023-12-20 07:25:09,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-12-20 07:25:09,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:25:09,513 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:25:09,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:25:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash 54396928, now seen corresponding path program 62 times [2023-12-20 07:25:09,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:25:09,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620137169] [2023-12-20 07:25:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:25:09,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:25:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:25:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:11,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:25:11,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620137169] [2023-12-20 07:25:11,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620137169] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:25:11,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044757181] [2023-12-20 07:25:11,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:25:11,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:25:11,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:25:11,395 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:25:11,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-12-20 07:25:11,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:25:11,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:25:11,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-20 07:25:11,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:25:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:13,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:25:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:14,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044757181] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:25:14,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:25:14,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 107 [2023-12-20 07:25:14,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985184211] [2023-12-20 07:25:14,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:25:14,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-12-20 07:25:14,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:25:14,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-12-20 07:25:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2595, Invalid=8747, Unknown=0, NotChecked=0, Total=11342 [2023-12-20 07:25:14,892 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:25:16,431 INFO L93 Difference]: Finished difference Result 445 states and 448 transitions. [2023-12-20 07:25:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-12-20 07:25:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 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 139 [2023-12-20 07:25:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:25:16,432 INFO L225 Difference]: With dead ends: 445 [2023-12-20 07:25:16,432 INFO L226 Difference]: Without dead ends: 147 [2023-12-20 07:25:16,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 175 SyntacticMatches, 67 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12016 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6406, Invalid=24044, Unknown=0, NotChecked=0, Total=30450 [2023-12-20 07:25:16,434 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 657 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:25:16,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 383 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 07:25:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-12-20 07:25:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2023-12-20 07:25:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2023-12-20 07:25:16,500 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2023-12-20 07:25:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:25:16,500 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2023-12-20 07:25:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2023-12-20 07:25:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-20 07:25:16,501 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:25:16,501 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-12-20 07:25:16,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-12-20 07:25:16,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-12-20 07:25:16,701 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:25:16,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:25:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1997251546, now seen corresponding path program 63 times [2023-12-20 07:25:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:25:16,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485668300] [2023-12-20 07:25:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:25:16,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:25:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:25:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:19,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:25:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485668300] [2023-12-20 07:25:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485668300] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:25:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267572488] [2023-12-20 07:25:19,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:25:19,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:25:19,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:25:19,552 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:25:19,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-12-20 07:25:34,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2023-12-20 07:25:34,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:25:34,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 146 conjunts are in the unsatisfiable core [2023-12-20 07:25:34,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:25:34,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:25:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:36,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:25:36,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:25:36,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 07:25:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:36,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267572488] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:25:36,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:25:36,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 107 [2023-12-20 07:25:36,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706577607] [2023-12-20 07:25:36,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:25:36,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-12-20 07:25:36,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:25:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-12-20 07:25:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=11062, Unknown=0, NotChecked=0, Total=11342 [2023-12-20 07:25:36,828 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 107 states, 107 states have (on average 2.2710280373831777) internal successors, (243), 107 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:40,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:25:40,922 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2023-12-20 07:25:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-12-20 07:25:40,923 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2710280373831777) internal successors, (243), 107 states have internal predecessors, (243), 0 states have call successors, (0), 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 140 [2023-12-20 07:25:40,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:25:40,923 INFO L225 Difference]: With dead ends: 147 [2023-12-20 07:25:40,923 INFO L226 Difference]: Without dead ends: 145 [2023-12-20 07:25:40,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=523, Invalid=19499, Unknown=0, NotChecked=0, Total=20022 [2023-12-20 07:25:40,925 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 2998 mSDsCounter, 0 mSdLazyCounter, 8796 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3036 SdHoareTripleChecker+Invalid, 8831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 8796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-20 07:25:40,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3036 Invalid, 8831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 8796 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-20 07:25:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-20 07:25:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2023-12-20 07:25:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2023-12-20 07:25:40,995 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2023-12-20 07:25:40,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:25:40,995 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2023-12-20 07:25:40,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2710280373831777) internal successors, (243), 107 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2023-12-20 07:25:40,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-12-20 07:25:40,996 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:25:40,996 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2023-12-20 07:25:41,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-12-20 07:25:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:25:41,196 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:25:41,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:25:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1943648867, now seen corresponding path program 64 times [2023-12-20 07:25:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:25:41,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005271668] [2023-12-20 07:25:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:25:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:25:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:25:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:43,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:25:43,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005271668] [2023-12-20 07:25:43,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005271668] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:25:43,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753072594] [2023-12-20 07:25:43,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:25:43,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:25:43,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:25:43,135 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:25:43,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-12-20 07:25:46,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:25:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:25:46,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-20 07:25:46,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:25:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:47,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:25:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:49,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753072594] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:25:49,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:25:49,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 110 [2023-12-20 07:25:49,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666227493] [2023-12-20 07:25:49,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:25:49,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-12-20 07:25:49,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:25:49,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-12-20 07:25:49,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2741, Invalid=9249, Unknown=0, NotChecked=0, Total=11990 [2023-12-20 07:25:49,427 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:25:50,287 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2023-12-20 07:25:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-20 07:25:50,287 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 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 143 [2023-12-20 07:25:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:25:50,288 INFO L225 Difference]: With dead ends: 260 [2023-12-20 07:25:50,288 INFO L226 Difference]: Without dead ends: 151 [2023-12-20 07:25:50,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 180 SyntacticMatches, 69 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9711 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4736, Invalid=16144, Unknown=0, NotChecked=0, Total=20880 [2023-12-20 07:25:50,290 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 455 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:25:50,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 359 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:25:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-12-20 07:25:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2023-12-20 07:25:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2023-12-20 07:25:50,385 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2023-12-20 07:25:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:25:50,385 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2023-12-20 07:25:50,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:25:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2023-12-20 07:25:50,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-20 07:25:50,386 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:25:50,386 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2023-12-20 07:25:50,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-12-20 07:25:50,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-12-20 07:25:50,598 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:25:50,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:25:50,598 INFO L85 PathProgramCache]: Analyzing trace with hash -849225411, now seen corresponding path program 65 times [2023-12-20 07:25:50,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:25:50,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225938142] [2023-12-20 07:25:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:25:50,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:25:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:25:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:25:53,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:25:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225938142] [2023-12-20 07:25:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225938142] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:25:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036089108] [2023-12-20 07:25:53,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:25:53,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:25:53,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:25:53,506 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:25:53,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-12-20 07:26:00,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2023-12-20 07:26:00,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:26:00,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 157 conjunts are in the unsatisfiable core [2023-12-20 07:26:00,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:26:02,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:26:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:05,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:26:05,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:26:05,991 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 16 treesize of output 12 [2023-12-20 07:26:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036089108] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:26:06,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:26:06,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 75, 75] total 149 [2023-12-20 07:26:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852824151] [2023-12-20 07:26:06,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:26:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2023-12-20 07:26:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:26:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2023-12-20 07:26:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=21605, Unknown=0, NotChecked=0, Total=22052 [2023-12-20 07:26:06,025 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 149 states, 149 states have (on average 1.9597315436241611) internal successors, (292), 149 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:26:11,458 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2023-12-20 07:26:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-12-20 07:26:11,458 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.9597315436241611) internal successors, (292), 149 states have internal predecessors, (292), 0 states have call successors, (0), 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 144 [2023-12-20 07:26:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:26:11,458 INFO L225 Difference]: With dead ends: 151 [2023-12-20 07:26:11,458 INFO L226 Difference]: Without dead ends: 149 [2023-12-20 07:26:11,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=745, Invalid=33665, Unknown=0, NotChecked=0, Total=34410 [2023-12-20 07:26:11,460 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 3987 mSDsCounter, 0 mSdLazyCounter, 12688 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4025 SdHoareTripleChecker+Invalid, 12726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 12688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:26:11,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 4025 Invalid, 12726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 12688 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-12-20 07:26:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-20 07:26:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2023-12-20 07:26:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2023-12-20 07:26:11,537 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2023-12-20 07:26:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:26:11,537 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2023-12-20 07:26:11,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.9597315436241611) internal successors, (292), 149 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2023-12-20 07:26:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-20 07:26:11,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:26:11,538 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2023-12-20 07:26:11,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-12-20 07:26:11,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-12-20 07:26:11,742 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:26:11,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:26:11,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1912052192, now seen corresponding path program 66 times [2023-12-20 07:26:11,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:26:11,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318319536] [2023-12-20 07:26:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:26:11,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:26:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:26:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:13,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:26:13,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318319536] [2023-12-20 07:26:13,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318319536] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:26:13,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853287856] [2023-12-20 07:26:13,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:26:13,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:26:13,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:26:13,789 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:26:13,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-12-20 07:26:26,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2023-12-20 07:26:26,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:26:26,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-20 07:26:26,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:26:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:28,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:26:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:29,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853287856] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:26:29,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:26:29,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 113 [2023-12-20 07:26:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041602377] [2023-12-20 07:26:29,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:26:29,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-12-20 07:26:29,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:26:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-12-20 07:26:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2891, Invalid=9765, Unknown=0, NotChecked=0, Total=12656 [2023-12-20 07:26:29,560 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:26:30,445 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2023-12-20 07:26:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-12-20 07:26:30,446 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 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 147 [2023-12-20 07:26:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:26:30,448 INFO L225 Difference]: With dead ends: 267 [2023-12-20 07:26:30,448 INFO L226 Difference]: Without dead ends: 155 [2023-12-20 07:26:30,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 185 SyntacticMatches, 71 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10259 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4997, Invalid=17055, Unknown=0, NotChecked=0, Total=22052 [2023-12-20 07:26:30,451 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 503 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:26:30,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 351 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:26:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-12-20 07:26:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2023-12-20 07:26:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2023-12-20 07:26:30,522 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2023-12-20 07:26:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:26:30,522 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2023-12-20 07:26:30,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2023-12-20 07:26:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-20 07:26:30,522 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:26:30,522 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2023-12-20 07:26:30,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-12-20 07:26:30,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-12-20 07:26:30,728 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:26:30,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:26:30,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1773041670, now seen corresponding path program 67 times [2023-12-20 07:26:30,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:26:30,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750866955] [2023-12-20 07:26:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:26:30,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:26:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:26:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:33,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:26:33,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750866955] [2023-12-20 07:26:33,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750866955] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:26:33,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736603026] [2023-12-20 07:26:33,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:26:33,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:26:33,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:26:33,800 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:26:33,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-12-20 07:26:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:26:34,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 156 conjunts are in the unsatisfiable core [2023-12-20 07:26:34,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:26:36,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:26:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:39,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:26:40,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:26:40,184 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 16 treesize of output 12 [2023-12-20 07:26:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:40,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736603026] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:26:40,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:26:40,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 151 [2023-12-20 07:26:40,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820483705] [2023-12-20 07:26:40,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:26:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-12-20 07:26:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:26:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-12-20 07:26:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=22202, Unknown=0, NotChecked=0, Total=22650 [2023-12-20 07:26:40,217 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 151 states, 151 states have (on average 1.9735099337748345) internal successors, (298), 151 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:26:45,288 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2023-12-20 07:26:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-12-20 07:26:45,288 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.9735099337748345) internal successors, (298), 151 states have internal predecessors, (298), 0 states have call successors, (0), 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 148 [2023-12-20 07:26:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:26:45,292 INFO L225 Difference]: With dead ends: 155 [2023-12-20 07:26:45,292 INFO L226 Difference]: Without dead ends: 153 [2023-12-20 07:26:45,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6108 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=743, Invalid=34413, Unknown=0, NotChecked=0, Total=35156 [2023-12-20 07:26:45,295 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 3877 mSDsCounter, 0 mSdLazyCounter, 11625 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3917 SdHoareTripleChecker+Invalid, 11663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 11625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-20 07:26:45,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3917 Invalid, 11663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 11625 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-20 07:26:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-20 07:26:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2023-12-20 07:26:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2023-12-20 07:26:45,374 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2023-12-20 07:26:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:26:45,374 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2023-12-20 07:26:45,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.9735099337748345) internal successors, (298), 151 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2023-12-20 07:26:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-20 07:26:45,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:26:45,375 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2023-12-20 07:26:45,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-12-20 07:26:45,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-12-20 07:26:45,583 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:26:45,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:26:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1171791293, now seen corresponding path program 68 times [2023-12-20 07:26:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:26:45,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299545045] [2023-12-20 07:26:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:26:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:26:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:26:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:47,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:26:47,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299545045] [2023-12-20 07:26:47,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299545045] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:26:47,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318788050] [2023-12-20 07:26:47,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:26:47,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:26:47,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:26:47,770 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:26:47,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-12-20 07:26:48,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:26:48,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:26:48,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-20 07:26:48,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:26:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:50,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:26:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:51,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318788050] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:26:51,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:26:51,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 116 [2023-12-20 07:26:51,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543138958] [2023-12-20 07:26:51,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:26:51,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-12-20 07:26:51,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:26:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-12-20 07:26:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3045, Invalid=10295, Unknown=0, NotChecked=0, Total=13340 [2023-12-20 07:26:51,672 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:52,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:26:52,588 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2023-12-20 07:26:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-20 07:26:52,588 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 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 151 [2023-12-20 07:26:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:26:52,589 INFO L225 Difference]: With dead ends: 274 [2023-12-20 07:26:52,589 INFO L226 Difference]: Without dead ends: 159 [2023-12-20 07:26:52,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 190 SyntacticMatches, 73 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10822 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5265, Invalid=17991, Unknown=0, NotChecked=0, Total=23256 [2023-12-20 07:26:52,591 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 513 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:26:52,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 373 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:26:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-20 07:26:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2023-12-20 07:26:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2023-12-20 07:26:52,662 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2023-12-20 07:26:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:26:52,662 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2023-12-20 07:26:52,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:26:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2023-12-20 07:26:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-20 07:26:52,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:26:52,663 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2023-12-20 07:26:52,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-12-20 07:26:52,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:26:52,864 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:26:52,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:26:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1392019229, now seen corresponding path program 69 times [2023-12-20 07:26:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:26:52,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153529672] [2023-12-20 07:26:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:26:52,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:26:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:26:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:26:56,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:26:56,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153529672] [2023-12-20 07:26:56,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153529672] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:26:56,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574475075] [2023-12-20 07:26:56,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:26:56,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:26:56,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:26:56,645 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:26:56,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-12-20 07:27:31,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2023-12-20 07:27:31,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:27:31,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 158 conjunts are in the unsatisfiable core [2023-12-20 07:27:31,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:27:33,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:27:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:27:37,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:27:41,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:27:41,666 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 16 treesize of output 12 [2023-12-20 07:27:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:27:41,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574475075] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:27:41,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:27:41,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 191 [2023-12-20 07:27:41,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213282160] [2023-12-20 07:27:41,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:27:41,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2023-12-20 07:27:41,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:27:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2023-12-20 07:27:41,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=35758, Unknown=0, NotChecked=0, Total=36290 [2023-12-20 07:27:41,702 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 191 states, 191 states have (on average 2.157068062827225) internal successors, (412), 191 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:27:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:27:52,858 INFO L93 Difference]: Finished difference Result 159 states and 160 transitions. [2023-12-20 07:27:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-12-20 07:27:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 2.157068062827225) internal successors, (412), 191 states have internal predecessors, (412), 0 states have call successors, (0), 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 152 [2023-12-20 07:27:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:27:52,859 INFO L225 Difference]: With dead ends: 159 [2023-12-20 07:27:52,859 INFO L226 Difference]: Without dead ends: 157 [2023-12-20 07:27:52,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8587 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=1159, Invalid=68801, Unknown=0, NotChecked=0, Total=69960 [2023-12-20 07:27:52,862 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 125 mSDsluCounter, 4618 mSDsCounter, 0 mSdLazyCounter, 14080 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 4659 SdHoareTripleChecker+Invalid, 14119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 14080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:27:52,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 4659 Invalid, 14119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 14080 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-12-20 07:27:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-20 07:27:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2023-12-20 07:27:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:27:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2023-12-20 07:27:52,953 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2023-12-20 07:27:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:27:52,953 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2023-12-20 07:27:52,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 2.157068062827225) internal successors, (412), 191 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:27:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2023-12-20 07:27:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-12-20 07:27:52,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:27:52,954 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2023-12-20 07:27:52,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-12-20 07:27:53,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:27:53,155 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:27:53,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:27:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1740401728, now seen corresponding path program 70 times [2023-12-20 07:27:53,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:27:53,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893896263] [2023-12-20 07:27:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:27:53,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:27:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:27:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1963 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:27:55,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:27:55,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893896263] [2023-12-20 07:27:55,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893896263] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:27:55,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291418379] [2023-12-20 07:27:55,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:27:55,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:27:55,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:27:55,433 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:27:55,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-12-20 07:28:03,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:28:03,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:28:03,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-20 07:28:03,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:28:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:28:05,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:28:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:28:07,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291418379] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:28:07,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:28:07,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 119 [2023-12-20 07:28:07,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913238349] [2023-12-20 07:28:07,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:28:07,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-12-20 07:28:07,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:28:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-12-20 07:28:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3203, Invalid=10839, Unknown=0, NotChecked=0, Total=14042 [2023-12-20 07:28:07,127 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:28:08,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:28:08,054 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2023-12-20 07:28:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-20 07:28:08,054 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 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 155 [2023-12-20 07:28:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:28:08,055 INFO L225 Difference]: With dead ends: 281 [2023-12-20 07:28:08,055 INFO L226 Difference]: Without dead ends: 163 [2023-12-20 07:28:08,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 195 SyntacticMatches, 75 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5540, Invalid=18952, Unknown=0, NotChecked=0, Total=24492 [2023-12-20 07:28:08,057 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 403 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:28:08,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 388 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:28:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-12-20 07:28:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2023-12-20 07:28:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:28:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2023-12-20 07:28:08,143 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2023-12-20 07:28:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:28:08,143 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2023-12-20 07:28:08,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:28:08,143 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2023-12-20 07:28:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-20 07:28:08,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:28:08,143 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2023-12-20 07:28:08,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-12-20 07:28:08,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:28:08,344 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:28:08,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:28:08,344 INFO L85 PathProgramCache]: Analyzing trace with hash 731583514, now seen corresponding path program 71 times [2023-12-20 07:28:08,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:28:08,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757930612] [2023-12-20 07:28:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:28:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:28:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:28:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:28:11,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:28:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757930612] [2023-12-20 07:28:11,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757930612] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:28:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914360800] [2023-12-20 07:28:11,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:28:11,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:28:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:28:11,740 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:28:11,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-12-20 07:28:15,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2023-12-20 07:28:15,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:28:15,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 169 conjunts are in the unsatisfiable core [2023-12-20 07:28:15,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:28:18,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:28:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:28:21,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:28:22,281 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 16 treesize of output 14 [2023-12-20 07:28:22,283 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 16 treesize of output 12 [2023-12-20 07:28:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:28:22,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914360800] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:28:22,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:28:22,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 81, 81] total 161 [2023-12-20 07:28:22,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108438360] [2023-12-20 07:28:22,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:28:22,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2023-12-20 07:28:22,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:28:22,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2023-12-20 07:28:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=25277, Unknown=0, NotChecked=0, Total=25760 [2023-12-20 07:28:22,331 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 161 states, 161 states have (on average 1.9627329192546583) internal successors, (316), 161 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:28:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:28:28,069 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2023-12-20 07:28:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-12-20 07:28:28,069 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.9627329192546583) internal successors, (316), 161 states have internal predecessors, (316), 0 states have call successors, (0), 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 156 [2023-12-20 07:28:28,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:28:28,070 INFO L225 Difference]: With dead ends: 163 [2023-12-20 07:28:28,070 INFO L226 Difference]: Without dead ends: 161 [2023-12-20 07:28:28,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7106 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=805, Invalid=39395, Unknown=0, NotChecked=0, Total=40200 [2023-12-20 07:28:28,072 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 4252 mSDsCounter, 0 mSdLazyCounter, 13104 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 13145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 13104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:28:28,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4293 Invalid, 13145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 13104 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-20 07:28:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-20 07:28:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2023-12-20 07:28:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:28:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2023-12-20 07:28:28,152 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2023-12-20 07:28:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:28:28,152 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2023-12-20 07:28:28,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.9627329192546583) internal successors, (316), 161 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:28:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2023-12-20 07:28:28,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-12-20 07:28:28,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:28:28,153 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2023-12-20 07:28:28,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-12-20 07:28:28,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2023-12-20 07:28:28,368 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:28:28,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:28:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1945199139, now seen corresponding path program 72 times [2023-12-20 07:28:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:28:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032959178] [2023-12-20 07:28:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:28:28,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:28:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:28:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2073 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:28:30,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:28:30,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032959178] [2023-12-20 07:28:30,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032959178] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:28:30,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312736997] [2023-12-20 07:28:30,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:28:30,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:28:30,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:28:30,760 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:28:30,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-12-20 07:28:54,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2023-12-20 07:28:54,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:28:54,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-20 07:28:54,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:28:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:28:56,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:28:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:28:57,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312736997] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:28:57,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:28:57,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 122 [2023-12-20 07:28:57,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052399676] [2023-12-20 07:28:57,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:28:57,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-12-20 07:28:57,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:28:57,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-12-20 07:28:57,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=11397, Unknown=0, NotChecked=0, Total=14762 [2023-12-20 07:28:57,946 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:28:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:28:58,924 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2023-12-20 07:28:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-12-20 07:28:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 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 159 [2023-12-20 07:28:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:28:58,925 INFO L225 Difference]: With dead ends: 288 [2023-12-20 07:28:58,925 INFO L226 Difference]: Without dead ends: 167 [2023-12-20 07:28:58,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 200 SyntacticMatches, 77 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11993 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5822, Invalid=19938, Unknown=0, NotChecked=0, Total=25760 [2023-12-20 07:28:58,927 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 419 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:28:58,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 433 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:28:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-20 07:28:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2023-12-20 07:28:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:28:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2023-12-20 07:28:59,033 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2023-12-20 07:28:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:28:59,033 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2023-12-20 07:28:59,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:28:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2023-12-20 07:28:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-20 07:28:59,034 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:28:59,034 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2023-12-20 07:28:59,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-12-20 07:28:59,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:28:59,237 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:28:59,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:28:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1445235965, now seen corresponding path program 73 times [2023-12-20 07:28:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:28:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323322997] [2023-12-20 07:28:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:28:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:28:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:29:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:29:02,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:29:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323322997] [2023-12-20 07:29:02,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323322997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:29:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230698799] [2023-12-20 07:29:02,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:29:02,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:29:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:29:02,760 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:29:02,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-12-20 07:29:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:29:03,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 168 conjunts are in the unsatisfiable core [2023-12-20 07:29:03,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:29:05,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:29:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:29:09,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:29:10,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:29:10,110 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 16 treesize of output 12 [2023-12-20 07:29:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:29:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230698799] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:29:10,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:29:10,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 163 [2023-12-20 07:29:10,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325448686] [2023-12-20 07:29:10,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:29:10,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2023-12-20 07:29:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:29:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2023-12-20 07:29:10,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=25922, Unknown=0, NotChecked=0, Total=26406 [2023-12-20 07:29:10,154 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 163 states, 163 states have (on average 1.9754601226993864) internal successors, (322), 163 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:29:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:29:16,504 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2023-12-20 07:29:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-12-20 07:29:16,505 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.9754601226993864) internal successors, (322), 163 states have internal predecessors, (322), 0 states have call successors, (0), 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 160 [2023-12-20 07:29:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:29:16,505 INFO L225 Difference]: With dead ends: 167 [2023-12-20 07:29:16,505 INFO L226 Difference]: Without dead ends: 165 [2023-12-20 07:29:16,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7143 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=803, Invalid=40203, Unknown=0, NotChecked=0, Total=41006 [2023-12-20 07:29:16,507 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 4873 mSDsCounter, 0 mSdLazyCounter, 14933 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4916 SdHoareTripleChecker+Invalid, 14973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 14933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-20 07:29:16,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4916 Invalid, 14973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 14933 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-12-20 07:29:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-20 07:29:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2023-12-20 07:29:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:29:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2023-12-20 07:29:16,590 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2023-12-20 07:29:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:29:16,590 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2023-12-20 07:29:16,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.9754601226993864) internal successors, (322), 163 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:29:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2023-12-20 07:29:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-20 07:29:16,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:29:16,591 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2023-12-20 07:29:16,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-12-20 07:29:16,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:29:16,791 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:29:16,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:29:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2017715616, now seen corresponding path program 74 times [2023-12-20 07:29:16,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:29:16,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817306867] [2023-12-20 07:29:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:29:16,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:29:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:29:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2186 proven. 895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:29:19,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:29:19,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817306867] [2023-12-20 07:29:19,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817306867] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:29:19,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462527416] [2023-12-20 07:29:19,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:29:19,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:29:19,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:29:19,297 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:29:19,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-12-20 07:29:19,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:29:19,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:29:19,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-20 07:29:19,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:29:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:29:22,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:29:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:29:23,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462527416] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:29:23,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:29:23,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 125 [2023-12-20 07:29:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470416355] [2023-12-20 07:29:23,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:29:23,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-12-20 07:29:23,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:29:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-12-20 07:29:23,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3531, Invalid=11969, Unknown=0, NotChecked=0, Total=15500 [2023-12-20 07:29:23,814 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:29:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:29:24,850 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2023-12-20 07:29:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-20 07:29:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 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 163 [2023-12-20 07:29:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:29:24,851 INFO L225 Difference]: With dead ends: 295 [2023-12-20 07:29:24,851 INFO L226 Difference]: Without dead ends: 171 [2023-12-20 07:29:24,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 205 SyntacticMatches, 79 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12601 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6111, Invalid=20949, Unknown=0, NotChecked=0, Total=27060 [2023-12-20 07:29:24,853 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 475 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:29:24,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 410 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:29:24,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-12-20 07:29:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2023-12-20 07:29:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:29:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2023-12-20 07:29:24,931 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2023-12-20 07:29:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:29:24,931 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2023-12-20 07:29:24,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:29:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2023-12-20 07:29:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-12-20 07:29:24,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:29:24,932 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2023-12-20 07:29:24,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-12-20 07:29:25,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-12-20 07:29:25,132 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:29:25,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:29:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1951025210, now seen corresponding path program 75 times [2023-12-20 07:29:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:29:25,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698541044] [2023-12-20 07:29:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:29:25,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:29:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:29:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 0 proven. 3121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:29:28,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:29:28,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698541044] [2023-12-20 07:29:28,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698541044] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:29:28,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863399373] [2023-12-20 07:29:28,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:29:28,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:29:28,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:29:28,826 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:29:28,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-12-20 07:30:17,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2023-12-20 07:30:17,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:30:17,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 175 conjunts are in the unsatisfiable core [2023-12-20 07:30:17,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:30:19,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:30:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 2262 proven. 859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:30:24,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:30:32,037 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 18 treesize of output 16 [2023-12-20 07:30:32,042 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 18 treesize of output 12 [2023-12-20 07:30:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 2223 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:30:37,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863399373] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:30:37,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:30:37,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 85, 85] total 249 [2023-12-20 07:30:37,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021568992] [2023-12-20 07:30:37,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:30:37,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 249 states [2023-12-20 07:30:37,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:30:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 249 interpolants. [2023-12-20 07:30:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4724, Invalid=57028, Unknown=0, NotChecked=0, Total=61752 [2023-12-20 07:30:37,785 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 249 states, 249 states have (on average 1.9558232931726907) internal successors, (487), 249 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:30:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:30:55,711 INFO L93 Difference]: Finished difference Result 294 states and 297 transitions. [2023-12-20 07:30:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2023-12-20 07:30:55,712 INFO L78 Accepts]: Start accepts. Automaton has has 249 states, 249 states have (on average 1.9558232931726907) internal successors, (487), 249 states have internal predecessors, (487), 0 states have call successors, (0), 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 164 [2023-12-20 07:30:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:30:55,713 INFO L225 Difference]: With dead ends: 294 [2023-12-20 07:30:55,713 INFO L226 Difference]: Without dead ends: 170 [2023-12-20 07:30:55,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46919 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=12485, Invalid=171985, Unknown=0, NotChecked=0, Total=184470 [2023-12-20 07:30:55,723 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 418 mSDsluCounter, 4277 mSDsCounter, 0 mSdLazyCounter, 13385 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 4320 SdHoareTripleChecker+Invalid, 13661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 13385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-20 07:30:55,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 4320 Invalid, 13661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 13385 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-20 07:30:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-20 07:30:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2023-12-20 07:30:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:30:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2023-12-20 07:30:55,841 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2023-12-20 07:30:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:30:55,841 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2023-12-20 07:30:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 249 states, 249 states have (on average 1.9558232931726907) internal successors, (487), 249 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:30:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2023-12-20 07:30:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-20 07:30:55,842 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:30:55,842 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2023-12-20 07:30:55,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-12-20 07:30:56,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-12-20 07:30:56,042 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:30:56,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:30:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1279519453, now seen corresponding path program 76 times [2023-12-20 07:30:56,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:30:56,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765491357] [2023-12-20 07:30:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:30:56,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:30:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:31:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 0 proven. 3281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:31:00,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:31:00,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765491357] [2023-12-20 07:31:00,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765491357] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:31:00,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784695506] [2023-12-20 07:31:00,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:31:00,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:31:00,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:31:00,518 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:31:00,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-12-20 07:31:06,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:31:06,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:31:06,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 181 conjunts are in the unsatisfiable core [2023-12-20 07:31:06,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:31:06,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:31:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 0 proven. 3281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:31:10,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:31:14,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:31:14,715 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 16 treesize of output 12 [2023-12-20 07:31:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 0 proven. 3281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:31:18,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784695506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:31:18,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:31:18,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 87, 87] total 212 [2023-12-20 07:31:18,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868128711] [2023-12-20 07:31:18,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:31:18,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2023-12-20 07:31:18,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:31:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2023-12-20 07:31:18,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=44056, Unknown=0, NotChecked=0, Total=44732 [2023-12-20 07:31:18,789 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 212 states, 212 states have (on average 2.1367924528301887) internal successors, (453), 212 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:31:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:31:27,907 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2023-12-20 07:31:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-12-20 07:31:27,907 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.1367924528301887) internal successors, (453), 212 states have internal predecessors, (453), 0 states have call successors, (0), 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 168 [2023-12-20 07:31:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:31:27,908 INFO L225 Difference]: With dead ends: 175 [2023-12-20 07:31:27,908 INFO L226 Difference]: Without dead ends: 173 [2023-12-20 07:31:27,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10711 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=1061, Invalid=63709, Unknown=0, NotChecked=0, Total=64770 [2023-12-20 07:31:27,911 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 5751 mSDsCounter, 0 mSdLazyCounter, 18270 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 5795 SdHoareTripleChecker+Invalid, 18313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 18270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-20 07:31:27,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 5795 Invalid, 18313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 18270 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-12-20 07:31:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-12-20 07:31:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2023-12-20 07:31:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:31:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2023-12-20 07:31:27,994 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2023-12-20 07:31:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:31:27,994 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2023-12-20 07:31:27,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.1367924528301887) internal successors, (453), 212 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:31:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2023-12-20 07:31:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-20 07:31:27,995 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:31:27,995 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2023-12-20 07:31:28,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-12-20 07:31:28,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:31:28,196 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:31:28,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:31:28,196 INFO L85 PathProgramCache]: Analyzing trace with hash 334065792, now seen corresponding path program 77 times [2023-12-20 07:31:28,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:31:28,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008286618] [2023-12-20 07:31:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:31:28,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:31:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:31:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2421 proven. 982 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:31:30,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:31:30,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008286618] [2023-12-20 07:31:30,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008286618] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:31:30,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412848087] [2023-12-20 07:31:30,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:31:30,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:31:30,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:31:30,982 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:31:30,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-12-20 07:31:40,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2023-12-20 07:31:40,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:31:40,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-20 07:31:40,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:31:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:31:43,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:31:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:31:45,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412848087] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:31:45,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:31:45,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 131 [2023-12-20 07:31:45,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467104657] [2023-12-20 07:31:45,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:31:45,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-12-20 07:31:45,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:31:45,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-12-20 07:31:45,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3875, Invalid=13155, Unknown=0, NotChecked=0, Total=17030 [2023-12-20 07:31:45,177 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:31:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:31:46,290 INFO L93 Difference]: Finished difference Result 309 states and 311 transitions. [2023-12-20 07:31:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-12-20 07:31:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 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 171 [2023-12-20 07:31:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:31:46,291 INFO L225 Difference]: With dead ends: 309 [2023-12-20 07:31:46,291 INFO L226 Difference]: Without dead ends: 179 [2023-12-20 07:31:46,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 215 SyntacticMatches, 83 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13862 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6710, Invalid=23046, Unknown=0, NotChecked=0, Total=29756 [2023-12-20 07:31:46,293 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 595 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:31:46,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 448 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 07:31:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-20 07:31:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 173. [2023-12-20 07:31:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:31:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2023-12-20 07:31:46,395 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2023-12-20 07:31:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:31:46,396 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2023-12-20 07:31:46,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:31:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2023-12-20 07:31:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 07:31:46,396 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:31:46,396 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2023-12-20 07:31:46,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-12-20 07:31:46,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:31:46,597 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:31:46,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:31:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash -599710630, now seen corresponding path program 78 times [2023-12-20 07:31:46,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:31:46,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397582159] [2023-12-20 07:31:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:31:46,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:31:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:31:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 0 proven. 3445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:31:50,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:31:50,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397582159] [2023-12-20 07:31:50,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397582159] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:31:50,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052802842] [2023-12-20 07:31:50,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:31:50,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:31:50,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:31:50,674 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:31:50,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-12-20 07:31:59,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2023-12-20 07:31:59,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:32:00,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 178 conjunts are in the unsatisfiable core [2023-12-20 07:32:00,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:00,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:32:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 0 proven. 3445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:32:03,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:03,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 07:32:03,893 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 16 treesize of output 12 [2023-12-20 07:32:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 0 proven. 3445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:32:03,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052802842] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:03,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:32:03,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 131 [2023-12-20 07:32:03,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468389457] [2023-12-20 07:32:03,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:03,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-12-20 07:32:03,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:03,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-12-20 07:32:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=16686, Unknown=0, NotChecked=0, Total=17030 [2023-12-20 07:32:03,932 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 131 states, 131 states have (on average 2.282442748091603) internal successors, (299), 131 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:32:09,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:09,942 INFO L93 Difference]: Finished difference Result 179 states and 180 transitions. [2023-12-20 07:32:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-12-20 07:32:09,943 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.282442748091603) internal successors, (299), 131 states have internal predecessors, (299), 0 states have call successors, (0), 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 172 [2023-12-20 07:32:09,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:09,943 INFO L225 Difference]: With dead ends: 179 [2023-12-20 07:32:09,943 INFO L226 Difference]: Without dead ends: 177 [2023-12-20 07:32:09,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=643, Invalid=29459, Unknown=0, NotChecked=0, Total=30102 [2023-12-20 07:32:09,945 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 4210 mSDsCounter, 0 mSdLazyCounter, 13035 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 13078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 13035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:09,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4256 Invalid, 13078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 13035 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-20 07:32:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-20 07:32:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2023-12-20 07:32:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:32:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2023-12-20 07:32:10,057 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2023-12-20 07:32:10,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:10,058 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2023-12-20 07:32:10,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.282442748091603) internal successors, (299), 131 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:32:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2023-12-20 07:32:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-20 07:32:10,058 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:10,058 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:10,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-12-20 07:32:10,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:10,259 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:10,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:10,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1089366499, now seen corresponding path program 79 times [2023-12-20 07:32:10,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:10,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611810297] [2023-12-20 07:32:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:10,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2543 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:32:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:32:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611810297] [2023-12-20 07:32:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611810297] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:32:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123696253] [2023-12-20 07:32:13,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:32:13,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:13,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:32:13,134 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:32:13,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-12-20 07:32:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:32:13,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-20 07:32:13,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:32:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:32:16,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:32:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:32:18,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123696253] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:32:18,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:32:18,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 134 [2023-12-20 07:32:18,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187073060] [2023-12-20 07:32:18,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:32:18,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-12-20 07:32:18,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:32:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-12-20 07:32:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4053, Invalid=13769, Unknown=0, NotChecked=0, Total=17822 [2023-12-20 07:32:18,318 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:32:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:32:19,478 INFO L93 Difference]: Finished difference Result 316 states and 318 transitions. [2023-12-20 07:32:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-12-20 07:32:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 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 175 [2023-12-20 07:32:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:32:19,479 INFO L225 Difference]: With dead ends: 316 [2023-12-20 07:32:19,479 INFO L226 Difference]: Without dead ends: 183 [2023-12-20 07:32:19,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 220 SyntacticMatches, 85 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14515 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7020, Invalid=24132, Unknown=0, NotChecked=0, Total=31152 [2023-12-20 07:32:19,480 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 623 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:32:19,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 417 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 07:32:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-12-20 07:32:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2023-12-20 07:32:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:32:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2023-12-20 07:32:19,578 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 175 [2023-12-20 07:32:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:32:19,578 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2023-12-20 07:32:19,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:32:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2023-12-20 07:32:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-12-20 07:32:19,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:32:19,579 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2023-12-20 07:32:19,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2023-12-20 07:32:19,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:32:19,780 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:32:19,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:32:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash -332095299, now seen corresponding path program 80 times [2023-12-20 07:32:19,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:32:19,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070651695] [2023-12-20 07:32:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:32:19,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:32:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-20 07:32:21,532 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 07:32:21,534 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 07:32:21,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2023-12-20 07:32:21,534 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 177 with TraceHistMax 43,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 37 known predicates. [2023-12-20 07:32:21,538 INFO L445 BasicCegarLoop]: Path program histogram: [80, 1, 1, 1] [2023-12-20 07:32:21,539 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 07:32:21,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 07:32:21 BoogieIcfgContainer [2023-12-20 07:32:21,541 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 07:32:21,541 INFO L158 Benchmark]: Toolchain (without parser) took 795421.39ms. Allocated memory was 197.1MB in the beginning and 725.6MB in the end (delta: 528.5MB). Free memory was 150.2MB in the beginning and 407.1MB in the end (delta: -256.9MB). Peak memory consumption was 272.4MB. Max. memory is 8.0GB. [2023-12-20 07:32:21,541 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 07:32:21,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.82ms. Allocated memory is still 197.1MB. Free memory was 149.8MB in the beginning and 139.2MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-20 07:32:21,541 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.49ms. Allocated memory is still 197.1MB. Free memory was 139.2MB in the beginning and 137.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 07:32:21,541 INFO L158 Benchmark]: Boogie Preprocessor took 28.87ms. Allocated memory is still 197.1MB. Free memory was 137.6MB in the beginning and 135.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 07:32:21,541 INFO L158 Benchmark]: RCFGBuilder took 216.62ms. Allocated memory is still 197.1MB. Free memory was 135.8MB in the beginning and 125.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-20 07:32:21,542 INFO L158 Benchmark]: TraceAbstraction took 794966.56ms. Allocated memory was 197.1MB in the beginning and 725.6MB in the end (delta: 528.5MB). Free memory was 124.6MB in the beginning and 407.1MB in the end (delta: -282.5MB). Peak memory consumption was 247.2MB. Max. memory is 8.0GB. [2023-12-20 07:32:21,542 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 178.82ms. Allocated memory is still 197.1MB. Free memory was 149.8MB in the beginning and 139.2MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.49ms. Allocated memory is still 197.1MB. Free memory was 139.2MB in the beginning and 137.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.87ms. Allocated memory is still 197.1MB. Free memory was 137.6MB in the beginning and 135.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 216.62ms. Allocated memory is still 197.1MB. Free memory was 135.8MB in the beginning and 125.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 794966.56ms. Allocated memory was 197.1MB in the beginning and 725.6MB in the end (delta: 528.5MB). Free memory was 124.6MB in the beginning and 407.1MB in the end (delta: -282.5MB). Peak memory consumption was 247.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was analyzing trace of length 177 with TraceHistMax 43,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 37 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 794.9s, OverallIterations: 83, TraceHistogramMax: 43, PathProgramHistogramMax: 80, EmptinessCheckTime: 0.0s, AutomataDifference: 191.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12841 SdHoareTripleChecker+Valid, 87.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12841 mSDsluCounter, 89157 SdHoareTripleChecker+Invalid, 72.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 87106 mSDsCounter, 7352 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 262723 IncrementalHoareTripleChecker+Invalid, 270075 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7352 mSolverCounterUnsat, 2051 mSDtfsCounter, 262723 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20509 GetRequests, 9870 SyntacticMatches, 1650 SemanticMatches, 8989 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394671 ImplicationChecksByTransitivity, 359.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=234occurred in iteration=63, InterpolantAutomatonStates: 5173, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.1s AutomataMinimizationTime, 82 MinimizatonAttempts, 648 StatesRemovedByMinimization, 80 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 236.3s SatisfiabilityAnalysisTime, 331.8s InterpolantComputationTime, 14554 NumberOfCodeBlocks, 14554 NumberOfCodeBlocksAsserted, 1024 NumberOfCheckSat, 21582 ConstructedInterpolants, 119 QuantifiedInterpolants, 178870 SizeOfPredicates, 574 NumberOfNonLiveVariables, 35971 ConjunctsInSsa, 6021 ConjunctsInUnsatCore, 242 InterpolantComputations, 2 PerfectInterpolantSequences, 104998/286164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown