/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 17:01:48,498 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 17:01:48,568 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 17:01:48,572 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 17:01:48,573 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 17:01:48,594 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 17:01:48,594 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 17:01:48,595 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 17:01:48,595 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 17:01:48,598 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 17:01:48,598 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 17:01:48,598 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 17:01:48,599 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 17:01:48,600 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 17:01:48,600 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 17:01:48,601 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 17:01:48,601 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 17:01:48,601 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 17:01:48,601 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 17:01:48,601 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 17:01:48,601 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 17:01:48,602 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 17:01:48,602 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 17:01:48,602 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 17:01:48,602 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 17:01:48,602 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 17:01:48,602 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 17:01:48,603 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 17:01:48,603 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 17:01:48,603 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 17:01:48,604 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 17:01:48,604 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 17:01:48,604 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:01:48,604 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 17:01:48,604 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 17:01:48,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 17:01:48,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 17:01:48,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 17:01:48,605 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 17:01:48,605 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 17:01:48,605 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 17:01:48,605 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 17:01:48,605 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 17:01:48,606 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 17:01:48,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 17:01:48,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 17:01:48,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 17:01:48,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 17:01:48,838 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 17:01:48,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2023-12-15 17:01:50,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 17:01:50,178 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 17:01:50,178 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_original-2.i [2023-12-15 17:01:50,183 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ab60df5/d33e9dcab9c846b6a7da21d32c3481ca/FLAG577eb83c1 [2023-12-15 17:01:50,193 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ab60df5/d33e9dcab9c846b6a7da21d32c3481ca [2023-12-15 17:01:50,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 17:01:50,195 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 17:01:50,196 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 17:01:50,196 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 17:01:50,199 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 17:01:50,199 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@350b4e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50, skipping insertion in model container [2023-12-15 17:01:50,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,216 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 17:01:50,310 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_strcpy_original-2.i[896,909] [2023-12-15 17:01:50,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:01:50,326 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 17:01:50,334 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_strcpy_original-2.i[896,909] [2023-12-15 17:01:50,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:01:50,347 INFO L206 MainTranslator]: Completed translation [2023-12-15 17:01:50,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50 WrapperNode [2023-12-15 17:01:50,348 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 17:01:50,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 17:01:50,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 17:01:50,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 17:01:50,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,358 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,382 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-12-15 17:01:50,382 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 17:01:50,383 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 17:01:50,383 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 17:01:50,383 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 17:01:50,390 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,390 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,392 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,405 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-12-15 17:01:50,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,411 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 17:01:50,421 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 17:01:50,421 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 17:01:50,421 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 17:01:50,422 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (1/1) ... [2023-12-15 17:01:50,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:01:50,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:01:50,465 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) [2023-12-15 17:01:50,511 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 [2023-12-15 17:01:50,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 17:01:50,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 17:01:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 17:01:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-15 17:01:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 17:01:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 17:01:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 17:01:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-15 17:01:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 17:01:50,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 17:01:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 17:01:50,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 17:01:50,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-15 17:01:50,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 17:01:50,574 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 17:01:50,575 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 17:01:50,729 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 17:01:50,749 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 17:01:50,749 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-15 17:01:50,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:01:50 BoogieIcfgContainer [2023-12-15 17:01:50,750 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 17:01:50,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 17:01:50,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 17:01:50,755 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 17:01:50,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 05:01:50" (1/3) ... [2023-12-15 17:01:50,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4470da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:01:50, skipping insertion in model container [2023-12-15 17:01:50,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:01:50" (2/3) ... [2023-12-15 17:01:50,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4470da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:01:50, skipping insertion in model container [2023-12-15 17:01:50,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:01:50" (3/3) ... [2023-12-15 17:01:50,759 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2023-12-15 17:01:50,771 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 17:01:50,771 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 17:01:50,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 17:01:50,819 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;@468f299, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 17:01:50,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 17:01:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-15 17:01:50,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:50,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:50,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:50,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1614972568, now seen corresponding path program 1 times [2023-12-15 17:01:50,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:50,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460798667] [2023-12-15 17:01:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:01:50,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:50,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460798667] [2023-12-15 17:01:50,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460798667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:01:50,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:01:50,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 17:01:50,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605240600] [2023-12-15 17:01:50,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:01:50,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 17:01:50,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:01:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 17:01:50,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 17:01:50,992 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:01:51,007 INFO L93 Difference]: Finished difference Result 28 states and 42 transitions. [2023-12-15 17:01:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 17:01:51,008 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-15 17:01:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:01:51,013 INFO L225 Difference]: With dead ends: 28 [2023-12-15 17:01:51,013 INFO L226 Difference]: Without dead ends: 13 [2023-12-15 17:01:51,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 17:01:51,018 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:01:51,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:01:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-15 17:01:51,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-15 17:01:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2023-12-15 17:01:51,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2023-12-15 17:01:51,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:01:51,042 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2023-12-15 17:01:51,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:51,042 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2023-12-15 17:01:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-15 17:01:51,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:51,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:51,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 17:01:51,045 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:51,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:51,045 INFO L85 PathProgramCache]: Analyzing trace with hash -334388671, now seen corresponding path program 1 times [2023-12-15 17:01:51,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:51,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769583878] [2023-12-15 17:01:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:51,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:01:51,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:51,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769583878] [2023-12-15 17:01:51,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769583878] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:01:51,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:01:51,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 17:01:51,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745215743] [2023-12-15 17:01:51,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:01:51,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 17:01:51,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:01:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 17:01:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 17:01:51,143 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:51,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:01:51,151 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2023-12-15 17:01:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 17:01:51,151 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-15 17:01:51,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:01:51,151 INFO L225 Difference]: With dead ends: 25 [2023-12-15 17:01:51,151 INFO L226 Difference]: Without dead ends: 14 [2023-12-15 17:01:51,152 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 [2023-12-15 17:01:51,153 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:01:51,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:01:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-15 17:01:51,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-15 17:01:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2023-12-15 17:01:51,156 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 11 [2023-12-15 17:01:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:01:51,156 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2023-12-15 17:01:51,156 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2023-12-15 17:01:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-15 17:01:51,156 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:51,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:51,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 17:01:51,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:51,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1222171738, now seen corresponding path program 1 times [2023-12-15 17:01:51,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:51,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712350510] [2023-12-15 17:01:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:51,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:01:51,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712350510] [2023-12-15 17:01:51,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712350510] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:01:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579661825] [2023-12-15 17:01:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:51,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:51,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:01:51,265 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) [2023-12-15 17:01:51,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 17:01:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:51,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 17:01:51,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:01:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:01:51,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:01:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:01:51,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579661825] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:01:51,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:01:51,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-15 17:01:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029239470] [2023-12-15 17:01:51,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:01:51,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 17:01:51,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:01:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 17:01:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-15 17:01:51,361 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:01:51,373 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2023-12-15 17:01:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 17:01:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-15 17:01:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:01:51,374 INFO L225 Difference]: With dead ends: 28 [2023-12-15 17:01:51,374 INFO L226 Difference]: Without dead ends: 17 [2023-12-15 17:01:51,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-15 17:01:51,376 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:01:51,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:01:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-15 17:01:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-15 17:01:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-15 17:01:51,379 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2023-12-15 17:01:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:01:51,379 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-15 17:01:51,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-15 17:01:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-15 17:01:51,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:51,380 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:51,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 17:01:51,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:51,585 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:51,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash -971418751, now seen corresponding path program 2 times [2023-12-15 17:01:51,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:51,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389922170] [2023-12-15 17:01:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:01:51,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:51,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389922170] [2023-12-15 17:01:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389922170] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:01:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110433354] [2023-12-15 17:01:51,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:01:51,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:51,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:01:51,752 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) [2023-12-15 17:01:51,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 17:01:51,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-15 17:01:51,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:01:51,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-15 17:01:51,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:01:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:01:51,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 17:01:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110433354] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:01:51,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 17:01:51,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-12-15 17:01:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274784607] [2023-12-15 17:01:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:01:51,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 17:01:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:01:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 17:01:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-12-15 17:01:51,944 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:01:52,016 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-12-15 17:01:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 17:01:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-15 17:01:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:01:52,019 INFO L225 Difference]: With dead ends: 42 [2023-12-15 17:01:52,019 INFO L226 Difference]: Without dead ends: 29 [2023-12-15 17:01:52,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-12-15 17:01:52,022 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:01:52,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 33 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:01:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-15 17:01:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2023-12-15 17:01:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-15 17:01:52,034 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2023-12-15 17:01:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:01:52,035 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-15 17:01:52,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-15 17:01:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-15 17:01:52,036 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:52,036 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:52,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-15 17:01:52,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-15 17:01:52,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:52,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:52,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1780765377, now seen corresponding path program 1 times [2023-12-15 17:01:52,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:52,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474178590] [2023-12-15 17:01:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:52,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:01:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474178590] [2023-12-15 17:01:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474178590] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:01:52,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:01:52,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 17:01:52,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102607261] [2023-12-15 17:01:52,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:01:52,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 17:01:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:01:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 17:01:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 17:01:52,295 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:01:52,317 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-12-15 17:01:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 17:01:52,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-15 17:01:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:01:52,318 INFO L225 Difference]: With dead ends: 38 [2023-12-15 17:01:52,318 INFO L226 Difference]: Without dead ends: 27 [2023-12-15 17:01:52,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 17:01:52,319 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:01:52,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:01:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-15 17:01:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-12-15 17:01:52,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-12-15 17:01:52,322 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2023-12-15 17:01:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:01:52,322 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-12-15 17:01:52,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-12-15 17:01:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 17:01:52,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:52,323 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:52,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-15 17:01:52,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:52,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1328127059, now seen corresponding path program 1 times [2023-12-15 17:01:52,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:52,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288099548] [2023-12-15 17:01:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:52,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:01:52,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288099548] [2023-12-15 17:01:52,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288099548] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:01:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868633881] [2023-12-15 17:01:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:52,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:52,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:01:52,406 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) [2023-12-15 17:01:52,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 17:01:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:52,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 17:01:52,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:01:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:01:52,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:01:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:01:52,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868633881] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:01:52,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:01:52,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-15 17:01:52,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76593680] [2023-12-15 17:01:52,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:01:52,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 17:01:52,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:01:52,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 17:01:52,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-15 17:01:52,532 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:52,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:01:52,547 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-12-15 17:01:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 17:01:52,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-15 17:01:52,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:01:52,548 INFO L225 Difference]: With dead ends: 40 [2023-12-15 17:01:52,548 INFO L226 Difference]: Without dead ends: 26 [2023-12-15 17:01:52,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-15 17:01:52,549 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:01:52,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:01:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-15 17:01:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-15 17:01:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-15 17:01:52,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2023-12-15 17:01:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:01:52,552 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-15 17:01:52,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-15 17:01:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-15 17:01:52,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:52,553 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:52,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 17:01:52,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:52,758 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:52,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2119676531, now seen corresponding path program 2 times [2023-12-15 17:01:52,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:52,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156760610] [2023-12-15 17:01:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:52,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:01:52,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:52,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156760610] [2023-12-15 17:01:52,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156760610] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:01:52,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285429572] [2023-12-15 17:01:52,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:01:52,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:52,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:01:52,985 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) [2023-12-15 17:01:53,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 17:01:53,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:01:53,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:01:53,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 17:01:53,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:01:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:01:53,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:01:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:01:53,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285429572] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:01:53,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:01:53,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-15 17:01:53,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272224369] [2023-12-15 17:01:53,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:01:53,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-15 17:01:53,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:01:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-15 17:01:53,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-15 17:01:53,280 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:01:53,310 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-12-15 17:01:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-15 17:01:53,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-15 17:01:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:01:53,311 INFO L225 Difference]: With dead ends: 52 [2023-12-15 17:01:53,311 INFO L226 Difference]: Without dead ends: 38 [2023-12-15 17:01:53,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-15 17:01:53,312 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:01:53,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:01:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-15 17:01:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-15 17:01:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-12-15 17:01:53,321 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2023-12-15 17:01:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:01:53,321 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-12-15 17:01:53,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-12-15 17:01:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-15 17:01:53,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:53,322 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:53,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 17:01:53,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:53,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:53,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:53,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1711445683, now seen corresponding path program 3 times [2023-12-15 17:01:53,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:53,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107174784] [2023-12-15 17:01:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:53,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:01:53,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107174784] [2023-12-15 17:01:53,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107174784] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:01:53,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353285677] [2023-12-15 17:01:53,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:01:53,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:53,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:01:53,945 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) [2023-12-15 17:01:53,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 17:01:54,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-15 17:01:54,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:01:54,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-15 17:01:54,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:01:54,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-15 17:01:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-15 17:01:54,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:01:54,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-12-15 17:01:54,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-12-15 17:01:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-15 17:01:54,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353285677] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:01:54,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:01:54,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5, 5] total 32 [2023-12-15 17:01:54,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698709746] [2023-12-15 17:01:54,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:01:54,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-15 17:01:54,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:01:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-15 17:01:54,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 17:01:54,373 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:01:54,868 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-12-15 17:01:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-15 17:01:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-15 17:01:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:01:54,870 INFO L225 Difference]: With dead ends: 58 [2023-12-15 17:01:54,870 INFO L226 Difference]: Without dead ends: 44 [2023-12-15 17:01:54,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=961, Invalid=2345, Unknown=0, NotChecked=0, Total=3306 [2023-12-15 17:01:54,872 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:01:54,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:01:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-15 17:01:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-12-15 17:01:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-12-15 17:01:54,881 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2023-12-15 17:01:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:01:54,881 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-12-15 17:01:54,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-12-15 17:01:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-15 17:01:54,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:54,883 INFO L195 NwaCegarLoop]: trace histogram [23, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:54,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-15 17:01:55,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:55,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:55,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash -874142206, now seen corresponding path program 1 times [2023-12-15 17:01:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:55,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490469750] [2023-12-15 17:01:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 17:01:55,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:55,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490469750] [2023-12-15 17:01:55,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490469750] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:01:55,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10533792] [2023-12-15 17:01:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:55,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:55,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:01:55,587 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) [2023-12-15 17:01:55,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 17:01:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:55,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-15 17:01:55,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:01:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 17:01:55,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:01:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 17:01:56,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10533792] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:01:56,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:01:56,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-12-15 17:01:56,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380196824] [2023-12-15 17:01:56,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:01:56,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-15 17:01:56,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:01:56,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-15 17:01:56,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-12-15 17:01:56,367 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:01:56,420 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2023-12-15 17:01:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-15 17:01:56,424 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-15 17:01:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:01:56,424 INFO L225 Difference]: With dead ends: 86 [2023-12-15 17:01:56,424 INFO L226 Difference]: Without dead ends: 68 [2023-12-15 17:01:56,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-12-15 17:01:56,426 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:01:56,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:01:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-15 17:01:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-15 17:01:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2023-12-15 17:01:56,433 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 42 [2023-12-15 17:01:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:01:56,433 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2023-12-15 17:01:56,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:01:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2023-12-15 17:01:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-15 17:01:56,434 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:01:56,434 INFO L195 NwaCegarLoop]: trace histogram [48, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:01:56,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 17:01:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:56,657 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:01:56,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:01:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1326841987, now seen corresponding path program 2 times [2023-12-15 17:01:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:01:56,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632475472] [2023-12-15 17:01:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:01:56,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:01:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:01:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 17:01:58,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:01:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632475472] [2023-12-15 17:01:58,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632475472] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:01:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961727283] [2023-12-15 17:01:58,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:01:58,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:01:58,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:01:58,223 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) [2023-12-15 17:01:58,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 17:01:58,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:01:58,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:01:58,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-15 17:01:58,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:01:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 17:01:58,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:02:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 17:02:00,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961727283] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:02:00,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:02:00,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-12-15 17:02:00,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381250995] [2023-12-15 17:02:00,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:02:00,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-12-15 17:02:00,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:02:00,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-12-15 17:02:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-12-15 17:02:00,679 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 100 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:02:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:02:00,888 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2023-12-15 17:02:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-15 17:02:00,888 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 100 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-12-15 17:02:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:02:00,889 INFO L225 Difference]: With dead ends: 136 [2023-12-15 17:02:00,889 INFO L226 Difference]: Without dead ends: 118 [2023-12-15 17:02:00,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-12-15 17:02:00,895 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:02:00,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:02:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-15 17:02:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-12-15 17:02:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 117 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:02:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2023-12-15 17:02:00,933 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 67 [2023-12-15 17:02:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:02:00,933 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2023-12-15 17:02:00,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 100 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:02:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2023-12-15 17:02:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-15 17:02:00,936 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:02:00,936 INFO L195 NwaCegarLoop]: trace histogram [98, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:02:00,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 17:02:01,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:02:01,142 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:02:01,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:02:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash 384441117, now seen corresponding path program 3 times [2023-12-15 17:02:01,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:02:01,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906761429] [2023-12-15 17:02:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:02:01,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:02:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:02:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4858 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 17:02:05,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:02:05,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906761429] [2023-12-15 17:02:05,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906761429] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:02:05,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202390728] [2023-12-15 17:02:05,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:02:05,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:02:05,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:02:05,960 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) [2023-12-15 17:02:05,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 17:02:06,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-15 17:02:06,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:02:06,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-15 17:02:06,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:02:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4858 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-12-15 17:02:06,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:02:06,885 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-15 17:02:06,885 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 22 treesize of output 11 [2023-12-15 17:02:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4858 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-12-15 17:02:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202390728] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:02:07,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:02:07,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 8, 8] total 113 [2023-12-15 17:02:07,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236613789] [2023-12-15 17:02:07,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:02:07,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2023-12-15 17:02:07,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:02:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2023-12-15 17:02:07,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5094, Invalid=7788, Unknown=0, NotChecked=0, Total=12882 [2023-12-15 17:02:07,087 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 114 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 113 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:02:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:02:11,214 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2023-12-15 17:02:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-12-15 17:02:11,214 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 113 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-12-15 17:02:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:02:11,215 INFO L225 Difference]: With dead ends: 158 [2023-12-15 17:02:11,215 INFO L226 Difference]: Without dead ends: 130 [2023-12-15 17:02:11,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6861 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=15333, Invalid=31973, Unknown=0, NotChecked=0, Total=47306 [2023-12-15 17:02:11,224 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:02:11,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 92 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:02:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-15 17:02:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2023-12-15 17:02:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 121 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:02:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2023-12-15 17:02:11,235 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 117 [2023-12-15 17:02:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:02:11,235 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2023-12-15 17:02:11,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 113 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:02:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2023-12-15 17:02:11,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-15 17:02:11,236 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:02:11,236 INFO L195 NwaCegarLoop]: trace histogram [99, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:02:11,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-15 17:02:11,448 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,SelfDestructingSolverStorable10 [2023-12-15 17:02:11,448 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:02:11,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:02:11,449 INFO L85 PathProgramCache]: Analyzing trace with hash 348039658, now seen corresponding path program 4 times [2023-12-15 17:02:11,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:02:11,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183216312] [2023-12-15 17:02:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:02:11,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:02:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:02:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4963 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 17:02:15,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:02:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183216312] [2023-12-15 17:02:15,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183216312] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:02:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349037461] [2023-12-15 17:02:15,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:02:15,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:02:15,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:02:15,492 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) [2023-12-15 17:02:15,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 17:02:15,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:02:15,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:02:15,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-15 17:02:15,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:02:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4963 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 17:02:15,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:02:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4963 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 17:02:23,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349037461] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:02:23,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:02:23,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2023-12-15 17:02:23,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374212005] [2023-12-15 17:02:23,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:02:23,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-12-15 17:02:23,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:02:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-12-15 17:02:23,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-12-15 17:02:23,530 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 203 states, 203 states have (on average 1.064039408866995) internal successors, (216), 202 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:02:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:02:23,941 INFO L93 Difference]: Finished difference Result 244 states and 350 transitions. [2023-12-15 17:02:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-12-15 17:02:23,942 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.064039408866995) internal successors, (216), 202 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-12-15 17:02:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:02:23,943 INFO L225 Difference]: With dead ends: 244 [2023-12-15 17:02:23,943 INFO L226 Difference]: Without dead ends: 223 [2023-12-15 17:02:23,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-12-15 17:02:23,945 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:02:23,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:02:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-12-15 17:02:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2023-12-15 17:02:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.018018018018018) internal successors, (226), 222 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:02:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 226 transitions. [2023-12-15 17:02:23,956 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 226 transitions. Word has length 121 [2023-12-15 17:02:23,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:02:23,957 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 226 transitions. [2023-12-15 17:02:23,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.064039408866995) internal successors, (216), 202 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:02:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 226 transitions. [2023-12-15 17:02:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-12-15 17:02:23,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:02:23,958 INFO L195 NwaCegarLoop]: trace histogram [200, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:02:23,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-15 17:02:24,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:02:24,163 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:02:24,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:02:24,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2144183119, now seen corresponding path program 5 times [2023-12-15 17:02:24,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:02:24,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969610915] [2023-12-15 17:02:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:02:24,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:02:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:02:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20113 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 17:02:38,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:02:38,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969610915] [2023-12-15 17:02:38,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969610915] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:02:38,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095676057] [2023-12-15 17:02:38,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:02:38,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:02:38,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:02:38,935 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) [2023-12-15 17:02:38,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process Received shutdown request... [2023-12-15 17:03:00,273 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:03:00,279 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 [2023-12-15 17:03:01,300 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 [2023-12-15 17:03:01,473 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forcibly destroying the process [2023-12-15 17:03:01,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 17:03:01,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 17:03:01,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202] total 202 [2023-12-15 17:03:01,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053931427] [2023-12-15 17:03:01,481 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 17:03:01,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-12-15 17:03:01,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:03:01,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 137 [2023-12-15 17:03:01,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-12-15 17:03:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-12-15 17:03:01,489 INFO L87 Difference]: Start difference. First operand 223 states and 226 transitions. Second operand has 203 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 202 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:03:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 17:03:01,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-12-15 17:03:01,491 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 [2023-12-15 17:03:01,491 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] [2023-12-15 17:03:01,492 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 17:03:01,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-15 17:03:01,512 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (223states) and FLOYD_HOARE automaton (currently 2 states, 203 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-15 17:03:01,517 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1] [2023-12-15 17:03:01,519 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 17:03:01,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 05:03:01 BoogieIcfgContainer [2023-12-15 17:03:01,523 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 17:03:01,524 INFO L158 Benchmark]: Toolchain (without parser) took 71328.90ms. Allocated memory was 188.7MB in the beginning and 1.0GB in the end (delta: 853.5MB). Free memory was 141.2MB in the beginning and 423.1MB in the end (delta: -281.9MB). Peak memory consumption was 573.3MB. Max. memory is 8.0GB. [2023-12-15 17:03:01,524 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 136.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 17:03:01,524 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.19ms. Allocated memory is still 188.7MB. Free memory was 140.9MB in the beginning and 129.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 17:03:01,525 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.55ms. Allocated memory is still 188.7MB. Free memory was 129.9MB in the beginning and 128.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 17:03:01,525 INFO L158 Benchmark]: Boogie Preprocessor took 38.12ms. Allocated memory is still 188.7MB. Free memory was 128.3MB in the beginning and 126.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:03:01,525 INFO L158 Benchmark]: RCFGBuilder took 328.67ms. Allocated memory is still 188.7MB. Free memory was 126.2MB in the beginning and 114.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-15 17:03:01,526 INFO L158 Benchmark]: TraceAbstraction took 70771.25ms. Allocated memory was 188.7MB in the beginning and 1.0GB in the end (delta: 853.5MB). Free memory was 113.6MB in the beginning and 423.1MB in the end (delta: -309.6MB). Peak memory consumption was 546.1MB. Max. memory is 8.0GB. [2023-12-15 17:03:01,528 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 188.7MB. Free memory is still 136.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 152.19ms. Allocated memory is still 188.7MB. Free memory was 140.9MB in the beginning and 129.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.55ms. Allocated memory is still 188.7MB. Free memory was 129.9MB in the beginning and 128.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.12ms. Allocated memory is still 188.7MB. Free memory was 128.3MB in the beginning and 126.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 328.67ms. Allocated memory is still 188.7MB. Free memory was 126.2MB in the beginning and 114.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 70771.25ms. Allocated memory was 188.7MB in the beginning and 1.0GB in the end (delta: 853.5MB). Free memory was 113.6MB in the beginning and 423.1MB in the end (delta: -309.6MB). Peak memory consumption was 546.1MB. 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: 16]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 16). Cancelled while NwaCegarLoop was constructing difference of abstraction (223states) and FLOYD_HOARE automaton (currently 2 states, 203 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 70.7s, OverallIterations: 13, TraceHistogramMax: 200, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 57 mSDsluCounter, 589 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 444 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 985 IncrementalHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 145 mSDtfsCounter, 985 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1541 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 878 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8138 ImplicationChecksByTransitivity, 31.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=12, InterpolantAutomatonStates: 553, 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, 12 MinimizatonAttempts, 25 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 38.6s InterpolantComputationTime, 1161 NumberOfCodeBlocks, 1041 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1568 ConstructedInterpolants, 0 QuantifiedInterpolants, 5052 SizeOfPredicates, 29 NumberOfNonLiveVariables, 2486 ConjunctsInSsa, 253 ConjunctsInUnsatCore, 30 InterpolantComputations, 4 PerfectInterpolantSequences, 10352/54988 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