/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-examples/standard_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 05:37:20,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 05:37:20,630 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 05:37:20,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 05:37:20,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 05:37:20,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 05:37:20,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 05:37:20,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 05:37:20,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 05:37:20,660 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 05:37:20,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 05:37:20,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 05:37:20,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 05:37:20,662 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 05:37:20,662 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 05:37:20,662 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 05:37:20,662 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 05:37:20,662 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 05:37:20,663 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 05:37:20,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 05:37:20,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 05:37:20,663 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 05:37:20,663 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 05:37:20,663 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 05:37:20,663 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 05:37:20,664 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 05:37:20,664 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 05:37:20,664 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 05:37:20,664 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 05:37:20,664 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 05:37:20,665 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 05:37:20,665 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 05:37:20,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 05:37:20,665 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 05:37:20,666 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 05:37:20,666 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 05:37:20,666 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 05:37:20,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 05:37:20,666 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 05:37:20,666 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 05:37:20,666 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 05:37:20,666 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 05:37:20,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 05:37:20,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 05:37:20,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 05:37:20,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 05:37:20,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 05:37:20,896 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 05:37:20,896 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 05:37:20,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2023-12-20 05:37:21,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 05:37:22,134 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 05:37:22,135 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2023-12-20 05:37:22,140 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/069b6e897/755a206de7034477a19ce1f2b6e8d30f/FLAG3d1c80f3d [2023-12-20 05:37:22,162 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/069b6e897/755a206de7034477a19ce1f2b6e8d30f [2023-12-20 05:37:22,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 05:37:22,168 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 05:37:22,168 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 05:37:22,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 05:37:22,174 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 05:37:22,175 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,175 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a554390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22, skipping insertion in model container [2023-12-20 05:37:22,175 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,197 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 05:37:22,312 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-examples/standard_compareModified_ground.i[824,837] [2023-12-20 05:37:22,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 05:37:22,335 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 05:37:22,345 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-examples/standard_compareModified_ground.i[824,837] [2023-12-20 05:37:22,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 05:37:22,369 INFO L206 MainTranslator]: Completed translation [2023-12-20 05:37:22,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22 WrapperNode [2023-12-20 05:37:22,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 05:37:22,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 05:37:22,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 05:37:22,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 05:37:22,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,390 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 88 [2023-12-20 05:37:22,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 05:37:22,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 05:37:22,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 05:37:22,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 05:37:22,401 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,402 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,416 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 2, 3, 5]. 42 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-12-20 05:37:22,417 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,417 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,422 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,429 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,434 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,435 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,436 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 05:37:22,437 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 05:37:22,437 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 05:37:22,437 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 05:37:22,438 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (1/1) ... [2023-12-20 05:37:22,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 05:37:22,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:22,475 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 05:37:22,481 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 05:37:22,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 05:37:22,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 05:37:22,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 05:37:22,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 05:37:22,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 05:37:22,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 05:37:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 05:37:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 05:37:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 05:37:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 05:37:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 05:37:22,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 05:37:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 05:37:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 05:37:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 05:37:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 05:37:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-20 05:37:22,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-20 05:37:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 05:37:22,572 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 05:37:22,574 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 05:37:22,696 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 05:37:22,721 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 05:37:22,721 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-20 05:37:22,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 05:37:22 BoogieIcfgContainer [2023-12-20 05:37:22,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 05:37:22,723 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 05:37:22,723 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 05:37:22,725 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 05:37:22,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 05:37:22" (1/3) ... [2023-12-20 05:37:22,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691d8d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 05:37:22, skipping insertion in model container [2023-12-20 05:37:22,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:22" (2/3) ... [2023-12-20 05:37:22,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691d8d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 05:37:22, skipping insertion in model container [2023-12-20 05:37:22,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 05:37:22" (3/3) ... [2023-12-20 05:37:22,727 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2023-12-20 05:37:22,745 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 05:37:22,745 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 05:37:22,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 05:37:22,779 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;@710ed3fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 05:37:22,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 05:37:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 05:37:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-20 05:37:22,786 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:22,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:22,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:22,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:22,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1330138201, now seen corresponding path program 1 times [2023-12-20 05:37:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:22,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072822286] [2023-12-20 05:37:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:22,962 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 05:37:22,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:22,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072822286] [2023-12-20 05:37:22,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072822286] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 05:37:22,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 05:37:22,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 05:37:22,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894765073] [2023-12-20 05:37:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 05:37:22,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 05:37:22,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 05:37:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 05:37:22,989 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:23,042 INFO L93 Difference]: Finished difference Result 45 states and 69 transitions. [2023-12-20 05:37:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 05:37:23,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:37:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:23,074 INFO L225 Difference]: With dead ends: 45 [2023-12-20 05:37:23,074 INFO L226 Difference]: Without dead ends: 22 [2023-12-20 05:37:23,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:37:23,081 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:23,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:37:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-20 05:37:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-20 05:37:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 05:37:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-12-20 05:37:23,110 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2023-12-20 05:37:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:23,111 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-12-20 05:37:23,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-12-20 05:37:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-20 05:37:23,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:23,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:23,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 05:37:23,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:23,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -771809293, now seen corresponding path program 1 times [2023-12-20 05:37:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:23,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089226845] [2023-12-20 05:37:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:23,225 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 05:37:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089226845] [2023-12-20 05:37:23,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089226845] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42041638] [2023-12-20 05:37:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:23,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:23,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:23,228 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 05:37:23,269 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 05:37:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:23,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 05:37:23,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:23,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 05:37:23,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42041638] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 05:37:23,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 05:37:23,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-12-20 05:37:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871872633] [2023-12-20 05:37:23,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 05:37:23,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 05:37:23,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 05:37:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 05:37:23,327 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:23,352 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-12-20 05:37:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 05:37:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:37:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:23,353 INFO L225 Difference]: With dead ends: 40 [2023-12-20 05:37:23,353 INFO L226 Difference]: Without dead ends: 25 [2023-12-20 05:37:23,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 05:37:23,355 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:23,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:37:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-20 05:37:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-12-20 05:37:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 05:37:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-12-20 05:37:23,364 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2023-12-20 05:37:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:23,365 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-12-20 05:37:23,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-12-20 05:37:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-20 05:37:23,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:23,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:23,375 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 05:37:23,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:23,571 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:23,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash 211229474, now seen corresponding path program 1 times [2023-12-20 05:37:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:23,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068714529] [2023-12-20 05:37:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:23,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:23,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:23,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068714529] [2023-12-20 05:37:23,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068714529] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:23,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135349439] [2023-12-20 05:37:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:23,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:23,691 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 05:37:23,696 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 05:37:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:23,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 05:37:23,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:23,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 05:37:23,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135349439] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 05:37:23,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 05:37:23,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 05:37:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019946689] [2023-12-20 05:37:23,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 05:37:23,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 05:37:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 05:37:23,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 05:37:23,787 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:23,813 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-12-20 05:37:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 05:37:23,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:37:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:23,815 INFO L225 Difference]: With dead ends: 45 [2023-12-20 05:37:23,815 INFO L226 Difference]: Without dead ends: 32 [2023-12-20 05:37:23,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 05:37:23,819 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:23,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:37:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-20 05:37:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-12-20 05:37:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 05:37:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-12-20 05:37:23,824 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2023-12-20 05:37:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:23,824 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-12-20 05:37:23,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-12-20 05:37:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-20 05:37:23,825 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:23,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:23,830 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 05:37:24,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-20 05:37:24,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:24,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:24,030 INFO L85 PathProgramCache]: Analyzing trace with hash -181797536, now seen corresponding path program 1 times [2023-12-20 05:37:24,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:24,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269249576] [2023-12-20 05:37:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:24,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:24,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:24,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269249576] [2023-12-20 05:37:24,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269249576] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:24,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191892361] [2023-12-20 05:37:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:24,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:24,122 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 05:37:24,148 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 05:37:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:24,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 05:37:24,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:24,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:24,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191892361] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:24,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:24,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-20 05:37:24,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577465178] [2023-12-20 05:37:24,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:24,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 05:37:24,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 05:37:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 05:37:24,231 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:24,258 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2023-12-20 05:37:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 05:37:24,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:37:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:24,260 INFO L225 Difference]: With dead ends: 56 [2023-12-20 05:37:24,260 INFO L226 Difference]: Without dead ends: 31 [2023-12-20 05:37:24,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 05:37:24,262 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:24,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:37:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-20 05:37:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-20 05:37:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 05:37:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-12-20 05:37:24,272 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 15 [2023-12-20 05:37:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:24,272 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-12-20 05:37:24,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-12-20 05:37:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 05:37:24,273 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:24,273 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:24,280 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 05:37:24,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:24,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:24,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1600247457, now seen corresponding path program 2 times [2023-12-20 05:37:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:24,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961321258] [2023-12-20 05:37:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:24,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 05:37:24,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:24,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961321258] [2023-12-20 05:37:24,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961321258] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:24,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119357602] [2023-12-20 05:37:24,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 05:37:24,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:24,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:24,578 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 05:37:24,604 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 05:37:24,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 05:37:24,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:37:24,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 05:37:24,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:24,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:24,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119357602] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:24,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:24,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 13 [2023-12-20 05:37:24,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012000193] [2023-12-20 05:37:24,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:24,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 05:37:24,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:24,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 05:37:24,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 05:37:24,745 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:24,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:24,855 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2023-12-20 05:37:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 05:37:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-20 05:37:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:24,856 INFO L225 Difference]: With dead ends: 71 [2023-12-20 05:37:24,856 INFO L226 Difference]: Without dead ends: 46 [2023-12-20 05:37:24,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-12-20 05:37:24,857 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:24,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 133 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:37:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-20 05:37:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-12-20 05:37:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 05:37:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2023-12-20 05:37:24,861 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 18 [2023-12-20 05:37:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:24,861 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2023-12-20 05:37:24,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:24,861 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2023-12-20 05:37:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-20 05:37:24,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:24,862 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:24,869 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 05:37:25,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:25,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:25,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:25,067 INFO L85 PathProgramCache]: Analyzing trace with hash -831863726, now seen corresponding path program 3 times [2023-12-20 05:37:25,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:25,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217250333] [2023-12-20 05:37:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:25,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:25,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217250333] [2023-12-20 05:37:25,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217250333] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991955250] [2023-12-20 05:37:25,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 05:37:25,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:25,323 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 05:37:25,327 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 05:37:25,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 05:37:25,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:37:25,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 05:37:25,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 05:37:25,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 05:37:25,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991955250] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:25,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:25,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 18 [2023-12-20 05:37:25,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130575293] [2023-12-20 05:37:25,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:25,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 05:37:25,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:25,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 05:37:25,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-12-20 05:37:25,521 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:25,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:25,651 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2023-12-20 05:37:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 05:37:25,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:37:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:25,652 INFO L225 Difference]: With dead ends: 97 [2023-12-20 05:37:25,652 INFO L226 Difference]: Without dead ends: 67 [2023-12-20 05:37:25,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2023-12-20 05:37:25,653 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:25,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 123 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 05:37:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-20 05:37:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-12-20 05:37:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 05:37:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2023-12-20 05:37:25,657 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 27 [2023-12-20 05:37:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:25,658 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2023-12-20 05:37:25,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2023-12-20 05:37:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 05:37:25,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:25,658 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:25,676 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 05:37:25,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:25,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:25,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:25,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1516990989, now seen corresponding path program 4 times [2023-12-20 05:37:25,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:25,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433976728] [2023-12-20 05:37:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:25,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-20 05:37:26,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:26,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433976728] [2023-12-20 05:37:26,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433976728] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:26,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988403244] [2023-12-20 05:37:26,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 05:37:26,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:26,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:26,093 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 05:37:26,109 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 05:37:26,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 05:37:26,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:37:26,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 05:37:26,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-20 05:37:26,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-20 05:37:26,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988403244] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:26,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:26,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-12-20 05:37:26,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252527975] [2023-12-20 05:37:26,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:26,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 05:37:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 05:37:26,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-12-20 05:37:26,425 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:26,593 INFO L93 Difference]: Finished difference Result 170 states and 236 transitions. [2023-12-20 05:37:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 05:37:26,594 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:37:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:26,596 INFO L225 Difference]: With dead ends: 170 [2023-12-20 05:37:26,596 INFO L226 Difference]: Without dead ends: 116 [2023-12-20 05:37:26,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 05:37:26,597 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:26,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 187 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 05:37:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-20 05:37:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-12-20 05:37:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 112 states have internal predecessors, (145), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 05:37:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 149 transitions. [2023-12-20 05:37:26,617 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 149 transitions. Word has length 40 [2023-12-20 05:37:26,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:26,617 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 149 transitions. [2023-12-20 05:37:26,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:26,618 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 149 transitions. [2023-12-20 05:37:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-20 05:37:26,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:26,619 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:26,630 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 05:37:26,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:26,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:26,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1227940402, now seen corresponding path program 5 times [2023-12-20 05:37:26,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:26,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948542727] [2023-12-20 05:37:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:26,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-12-20 05:37:27,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948542727] [2023-12-20 05:37:27,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948542727] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730163126] [2023-12-20 05:37:27,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 05:37:27,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:27,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:27,092 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 05:37:27,098 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 05:41:21,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-12-20 05:41:21,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:41:21,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 05:41:21,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:41:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-20 05:41:22,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:41:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-20 05:41:22,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730163126] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:41:22,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:41:22,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-12-20 05:41:22,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996265403] [2023-12-20 05:41:22,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:41:22,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-20 05:41:22,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:41:22,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-20 05:41:22,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2023-12-20 05:41:22,571 INFO L87 Difference]: Start difference. First operand 116 states and 149 transitions. Second operand has 45 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:41:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:41:22,782 INFO L93 Difference]: Finished difference Result 315 states and 445 transitions. [2023-12-20 05:41:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-20 05:41:22,782 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-12-20 05:41:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:41:22,783 INFO L225 Difference]: With dead ends: 315 [2023-12-20 05:41:22,783 INFO L226 Difference]: Without dead ends: 213 [2023-12-20 05:41:22,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1185, Invalid=2121, Unknown=0, NotChecked=0, Total=3306 [2023-12-20 05:41:22,787 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 05:41:22,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 235 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 05:41:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-12-20 05:41:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-12-20 05:41:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 209 states have (on average 1.3110047846889952) internal successors, (274), 209 states have internal predecessors, (274), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 05:41:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 278 transitions. [2023-12-20 05:41:22,802 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 278 transitions. Word has length 65 [2023-12-20 05:41:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:41:22,803 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 278 transitions. [2023-12-20 05:41:22,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 44 states have internal predecessors, (119), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:41:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 278 transitions. [2023-12-20 05:41:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-20 05:41:22,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:41:22,808 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:41:22,854 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 05:41:23,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:41:23,017 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:41:23,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:41:23,017 INFO L85 PathProgramCache]: Analyzing trace with hash -70373293, now seen corresponding path program 6 times [2023-12-20 05:41:23,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:41:23,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370876298] [2023-12-20 05:41:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:41:23,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:41:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:41:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-12-20 05:41:23,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:41:23,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370876298] [2023-12-20 05:41:23,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370876298] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:41:23,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949877139] [2023-12-20 05:41:23,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 05:41:23,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:41:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:41:23,370 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 05:41:23,372 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 05:41:23,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 05:41:23,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:41:23,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-20 05:41:23,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:41:24,190 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 19 treesize of output 11 [2023-12-20 05:41:24,193 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 15 treesize of output 7 [2023-12-20 05:41:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2023-12-20 05:41:24,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:41:24,610 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 05:41:24,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2023-12-20 05:41:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2023-12-20 05:41:24,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949877139] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:41:24,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:41:24,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 28 [2023-12-20 05:41:24,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637064259] [2023-12-20 05:41:24,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:41:24,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 05:41:24,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:41:24,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 05:41:24,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2023-12-20 05:41:24,658 INFO L87 Difference]: Start difference. First operand 213 states and 278 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:41:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:41:25,128 INFO L93 Difference]: Finished difference Result 455 states and 589 transitions. [2023-12-20 05:41:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-20 05:41:25,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-12-20 05:41:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:41:25,130 INFO L225 Difference]: With dead ends: 455 [2023-12-20 05:41:25,130 INFO L226 Difference]: Without dead ends: 257 [2023-12-20 05:41:25,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1903, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 05:41:25,133 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 05:41:25,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 220 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 05:41:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-12-20 05:41:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 220. [2023-12-20 05:41:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.2990654205607477) internal successors, (278), 215 states have internal predecessors, (278), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 05:41:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 284 transitions. [2023-12-20 05:41:25,143 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 284 transitions. Word has length 114 [2023-12-20 05:41:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:41:25,143 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 284 transitions. [2023-12-20 05:41:25,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:41:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 284 transitions. [2023-12-20 05:41:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-20 05:41:25,144 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:41:25,144 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:41:25,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-20 05:41:25,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-20 05:41:25,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:41:25,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:41:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1951396578, now seen corresponding path program 1 times [2023-12-20 05:41:25,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:41:25,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691822438] [2023-12-20 05:41:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:41:25,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:41:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:41:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-12-20 05:41:25,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:41:25,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691822438] [2023-12-20 05:41:25,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691822438] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:41:25,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340511369] [2023-12-20 05:41:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:41:25,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:41:25,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:41:25,676 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 05:41:25,694 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 05:41:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:41:25,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 05:41:25,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:41:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-12-20 05:41:25,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:41:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-12-20 05:41:26,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340511369] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:41:26,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:41:26,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-12-20 05:41:26,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876240288] [2023-12-20 05:41:26,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:41:26,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-20 05:41:26,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:41:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-20 05:41:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 05:41:26,152 INFO L87 Difference]: Start difference. First operand 220 states and 284 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:41:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:41:26,195 INFO L93 Difference]: Finished difference Result 440 states and 583 transitions. [2023-12-20 05:41:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 05:41:26,195 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:41:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:41:26,197 INFO L225 Difference]: With dead ends: 440 [2023-12-20 05:41:26,197 INFO L226 Difference]: Without dead ends: 236 [2023-12-20 05:41:26,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 05:41:26,198 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:41:26,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:41:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-12-20 05:41:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2023-12-20 05:41:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.2782608695652173) internal successors, (294), 231 states have internal predecessors, (294), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 05:41:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 300 transitions. [2023-12-20 05:41:26,208 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 300 transitions. Word has length 116 [2023-12-20 05:41:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:41:26,208 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 300 transitions. [2023-12-20 05:41:26,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:41:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 300 transitions. [2023-12-20 05:41:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-20 05:41:26,209 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:41:26,210 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:41:26,230 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 05:41:26,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 05:41:26,430 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:41:26,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:41:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1527115294, now seen corresponding path program 2 times [2023-12-20 05:41:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:41:26,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083628010] [2023-12-20 05:41:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:41:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:41:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:41:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-12-20 05:41:27,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:41:27,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083628010] [2023-12-20 05:41:27,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083628010] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:41:27,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457472039] [2023-12-20 05:41:27,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 05:41:27,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:41:27,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:41:27,328 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 05:41:27,340 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 05:41:27,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 05:41:27,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:41:27,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 05:41:27,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:41:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-12-20 05:41:27,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:41:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-12-20 05:41:28,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457472039] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:41:28,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:41:28,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2023-12-20 05:41:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654634727] [2023-12-20 05:41:28,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:41:28,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-20 05:41:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:41:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-20 05:41:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 05:41:28,598 INFO L87 Difference]: Start difference. First operand 236 states and 300 transitions. Second operand has 65 states, 65 states have (on average 1.2) internal successors, (78), 64 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:41:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:41:28,665 INFO L93 Difference]: Finished difference Result 472 states and 631 transitions. [2023-12-20 05:41:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-20 05:41:28,666 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2) internal successors, (78), 64 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:41:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:41:28,668 INFO L225 Difference]: With dead ends: 472 [2023-12-20 05:41:28,668 INFO L226 Difference]: Without dead ends: 268 [2023-12-20 05:41:28,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 05:41:28,669 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:41:28,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:41:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-12-20 05:41:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2023-12-20 05:41:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.2442748091603053) internal successors, (326), 263 states have internal predecessors, (326), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 05:41:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 332 transitions. [2023-12-20 05:41:28,679 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 332 transitions. Word has length 132 [2023-12-20 05:41:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:41:28,680 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 332 transitions. [2023-12-20 05:41:28,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2) internal successors, (78), 64 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:41:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 332 transitions. [2023-12-20 05:41:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-12-20 05:41:28,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:41:28,682 INFO L195 NwaCegarLoop]: trace histogram [62, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:41:28,704 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 05:41:28,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 05:41:28,891 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:41:28,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:41:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash -67874846, now seen corresponding path program 3 times [2023-12-20 05:41:28,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:41:28,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898488847] [2023-12-20 05:41:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:41:28,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:41:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:41:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3288 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-12-20 05:41:31,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:41:31,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898488847] [2023-12-20 05:41:31,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898488847] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:41:31,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490266997] [2023-12-20 05:41:31,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 05:41:31,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:41:31,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:41:31,418 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 05:41:31,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process Received shutdown request... [2023-12-20 05:52:04,524 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 05:52:04,524 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 05:52:05,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-20 05:52:05,725 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forcibly destroying the process [2023-12-20 05:52:05,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 137 [2023-12-20 05:52:05,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 05:52:05,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 05:52:05,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2023-12-20 05:52:05,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255362838] [2023-12-20 05:52:05,746 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 05:52:05,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-20 05:52:05,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:52:05,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-20 05:52:05,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 05:52:05,748 INFO L87 Difference]: Start difference. First operand 268 states and 332 transitions. Second operand has 65 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 64 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:52:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 05:52:05,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 05:52:05,750 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:52:05,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:52:05,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 05:52:05,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 05:52:05,752 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (268states) and FLOYD_HOARE automaton (currently 2 states, 65 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-20 05:52:05,756 INFO L445 BasicCegarLoop]: Path program histogram: [6, 3, 1, 1, 1] [2023-12-20 05:52:05,757 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 05:52:05,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 05:52:05 BoogieIcfgContainer [2023-12-20 05:52:05,761 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 05:52:05,762 INFO L158 Benchmark]: Toolchain (without parser) took 883594.10ms. Allocated memory was 179.3MB in the beginning and 319.8MB in the end (delta: 140.5MB). Free memory was 126.0MB in the beginning and 162.3MB in the end (delta: -36.3MB). Peak memory consumption was 105.6MB. Max. memory is 8.0GB. [2023-12-20 05:52:05,762 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 127.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 05:52:05,762 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.01ms. Allocated memory is still 179.3MB. Free memory was 125.7MB in the beginning and 114.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-20 05:52:05,762 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.36ms. Allocated memory is still 179.3MB. Free memory was 114.8MB in the beginning and 113.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 05:52:05,762 INFO L158 Benchmark]: Boogie Preprocessor took 45.87ms. Allocated memory is still 179.3MB. Free memory was 113.1MB in the beginning and 111.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 05:52:05,763 INFO L158 Benchmark]: RCFGBuilder took 284.19ms. Allocated memory is still 179.3MB. Free memory was 111.0MB in the beginning and 97.0MB in the end (delta: 14.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 05:52:05,763 INFO L158 Benchmark]: TraceAbstraction took 883038.72ms. Allocated memory was 179.3MB in the beginning and 319.8MB in the end (delta: 140.5MB). Free memory was 96.3MB in the beginning and 162.3MB in the end (delta: -66.0MB). Peak memory consumption was 76.2MB. Max. memory is 8.0GB. [2023-12-20 05:52:05,764 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 127.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.01ms. Allocated memory is still 179.3MB. Free memory was 125.7MB in the beginning and 114.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.36ms. Allocated memory is still 179.3MB. Free memory was 114.8MB in the beginning and 113.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.87ms. Allocated memory is still 179.3MB. Free memory was 113.1MB in the beginning and 111.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 284.19ms. Allocated memory is still 179.3MB. Free memory was 111.0MB in the beginning and 97.0MB in the end (delta: 14.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 883038.72ms. Allocated memory was 179.3MB in the beginning and 319.8MB in the end (delta: 140.5MB). Free memory was 96.3MB in the beginning and 162.3MB in the end (delta: -66.0MB). Peak memory consumption was 76.2MB. 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 constructing difference of abstraction (268states) and FLOYD_HOARE automaton (currently 2 states, 65 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 883.0s, OverallIterations: 12, TraceHistogramMax: 62, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 200 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 197 mSDsluCounter, 1370 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1126 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 791 IncrementalHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 244 mSDtfsCounter, 791 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1309 GetRequests, 949 SyntacticMatches, 0 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=268occurred in iteration=11, InterpolantAutomatonStates: 244, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 47 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 235.3s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 1283 NumberOfCodeBlocks, 1190 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1780 ConstructedInterpolants, 0 QuantifiedInterpolants, 6267 SizeOfPredicates, 14 NumberOfNonLiveVariables, 3210 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 14203/18957 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