/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-tiling/mlceu.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 18:27:33,481 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 18:27:33,544 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 18:27:33,548 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 18:27:33,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 18:27:33,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 18:27:33,569 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 18:27:33,569 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 18:27:33,569 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 18:27:33,572 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 18:27:33,572 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 18:27:33,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 18:27:33,573 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 18:27:33,574 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 18:27:33,574 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 18:27:33,574 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 18:27:33,574 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 18:27:33,574 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 18:27:33,575 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 18:27:33,575 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 18:27:33,576 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 18:27:33,576 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 18:27:33,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 18:27:33,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 18:27:33,576 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 18:27:33,576 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 18:27:33,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 18:27:33,577 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 18:27:33,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 18:27:33,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 18:27:33,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 18:27:33,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 18:27:33,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:27:33,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 18:27:33,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 18:27:33,578 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 18:27:33,578 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 18:27:33,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 18:27:33,579 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 18:27:33,579 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 18:27:33,579 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 18:27:33,579 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 18:27:33,579 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 18:27:33,579 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 18:27:33,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 18:27:33,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 18:27:33,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 18:27:33,759 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 18:27:33,759 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 18:27:33,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mlceu.c [2023-12-18 18:27:34,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 18:27:34,832 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 18:27:34,837 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c [2023-12-18 18:27:34,842 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb37624b/49ab21791eaa41af9a8d216ab1c5c542/FLAG28289d79d [2023-12-18 18:27:34,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb37624b/49ab21791eaa41af9a8d216ab1c5c542 [2023-12-18 18:27:34,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 18:27:34,855 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 18:27:34,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 18:27:34,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 18:27:34,861 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 18:27:34,861 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:27:34" (1/1) ... [2023-12-18 18:27:34,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5982caca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:34, skipping insertion in model container [2023-12-18 18:27:34,862 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:27:34" (1/1) ... [2023-12-18 18:27:34,876 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 18:27:34,975 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c[396,409] [2023-12-18 18:27:34,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:27:34,992 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 18:27:35,000 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c[396,409] [2023-12-18 18:27:35,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:27:35,015 INFO L206 MainTranslator]: Completed translation [2023-12-18 18:27:35,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35 WrapperNode [2023-12-18 18:27:35,016 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 18:27:35,016 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 18:27:35,016 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 18:27:35,017 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 18:27:35,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,041 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2023-12-18 18:27:35,041 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 18:27:35,042 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 18:27:35,042 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 18:27:35,042 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 18:27:35,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,050 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,058 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 8, 3]. 62 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-12-18 18:27:35,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,058 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,062 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,064 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,065 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,066 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 18:27:35,067 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 18:27:35,067 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 18:27:35,067 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 18:27:35,068 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (1/1) ... [2023-12-18 18:27:35,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:27:35,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:35,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-18 18:27:35,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-18 18:27:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 18:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 18:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 18:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 18:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 18:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 18:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 18:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 18:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 18:27:35,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 18:27:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 18:27:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 18:27:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 18:27:35,154 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 18:27:35,156 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 18:27:35,227 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 18:27:35,243 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 18:27:35,243 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-18 18:27:35,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:27:35 BoogieIcfgContainer [2023-12-18 18:27:35,244 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 18:27:35,245 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 18:27:35,245 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 18:27:35,247 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 18:27:35,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:27:34" (1/3) ... [2023-12-18 18:27:35,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d35b21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:27:35, skipping insertion in model container [2023-12-18 18:27:35,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:27:35" (2/3) ... [2023-12-18 18:27:35,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d35b21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:27:35, skipping insertion in model container [2023-12-18 18:27:35,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:27:35" (3/3) ... [2023-12-18 18:27:35,249 INFO L112 eAbstractionObserver]: Analyzing ICFG mlceu.c [2023-12-18 18:27:35,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 18:27:35,267 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 18:27:35,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 18:27:35,305 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;@11172d75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 18:27:35,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 18:27:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 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) [2023-12-18 18:27:35,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-18 18:27:35,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:35,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:35,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:35,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:35,316 INFO L85 PathProgramCache]: Analyzing trace with hash -569365392, now seen corresponding path program 1 times [2023-12-18 18:27:35,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:35,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846415440] [2023-12-18 18:27:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:35,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:35,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846415440] [2023-12-18 18:27:35,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846415440] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:27:35,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:27:35,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 18:27:35,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334736338] [2023-12-18 18:27:35,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:27:35,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 18:27:35,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:35,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 18:27:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:27:35,447 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 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) [2023-12-18 18:27:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:35,473 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2023-12-18 18:27:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:27:35,475 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 [2023-12-18 18:27:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:35,480 INFO L225 Difference]: With dead ends: 29 [2023-12-18 18:27:35,480 INFO L226 Difference]: Without dead ends: 13 [2023-12-18 18:27:35,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:27:35,486 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:35,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:27:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-18 18:27:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-18 18:27:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-18 18:27:35,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2023-12-18 18:27:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:35,508 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-18 18:27:35,508 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) [2023-12-18 18:27:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-18 18:27:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-18 18:27:35,509 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:35,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 18:27:35,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:35,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1205641970, now seen corresponding path program 1 times [2023-12-18 18:27:35,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:35,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232686370] [2023-12-18 18:27:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:35,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:35,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:35,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232686370] [2023-12-18 18:27:35,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232686370] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:27:35,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:27:35,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 18:27:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378490928] [2023-12-18 18:27:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:27:35,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 18:27:35,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 18:27:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 18:27:35,643 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2023-12-18 18:27:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:35,680 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-12-18 18:27:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 18:27:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2023-12-18 18:27:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:35,681 INFO L225 Difference]: With dead ends: 30 [2023-12-18 18:27:35,681 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 18:27:35,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 18:27:35,683 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:35,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:27:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 18:27:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2023-12-18 18:27:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-18 18:27:35,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-12-18 18:27:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:35,693 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-18 18:27:35,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2023-12-18 18:27:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-18 18:27:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 18:27:35,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:35,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:35,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 18:27:35,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:35,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:35,695 INFO L85 PathProgramCache]: Analyzing trace with hash 557936914, now seen corresponding path program 1 times [2023-12-18 18:27:35,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:35,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611299637] [2023-12-18 18:27:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:35,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:36,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611299637] [2023-12-18 18:27:36,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611299637] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:36,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779993587] [2023-12-18 18:27:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:36,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:36,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:36,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 18:27:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:36,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 18:27:36,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:36,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:27:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:36,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:36,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-18 18:27:36,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-18 18:27:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:36,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779993587] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:36,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:36,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-18 18:27:36,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682983386] [2023-12-18 18:27:36,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:36,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-18 18:27:36,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-18 18:27:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-18 18:27:36,256 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2023-12-18 18:27:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:36,327 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-12-18 18:27:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 18:27:36,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) Word has length 12 [2023-12-18 18:27:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:36,328 INFO L225 Difference]: With dead ends: 22 [2023-12-18 18:27:36,328 INFO L226 Difference]: Without dead ends: 20 [2023-12-18 18:27:36,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-12-18 18:27:36,332 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:36,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:27:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-18 18:27:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2023-12-18 18:27:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-12-18 18:27:36,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-12-18 18:27:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:36,337 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-12-18 18:27:36,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2023-12-18 18:27:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-12-18 18:27:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-18 18:27:36,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:36,338 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:36,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 18:27:36,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:36,543 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:36,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash -19725265, now seen corresponding path program 1 times [2023-12-18 18:27:36,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:36,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941516161] [2023-12-18 18:27:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:36,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:36,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:36,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941516161] [2023-12-18 18:27:36,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941516161] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:36,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553040953] [2023-12-18 18:27:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:36,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:36,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:36,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:36,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 18:27:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:36,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 18:27:36,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:36,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:36,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553040953] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:36,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:36,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 18:27:36,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286254970] [2023-12-18 18:27:36,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:36,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 18:27:36,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 18:27:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 18:27:36,758 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:36,815 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-12-18 18:27:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 18:27:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-18 18:27:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:36,817 INFO L225 Difference]: With dead ends: 43 [2023-12-18 18:27:36,817 INFO L226 Difference]: Without dead ends: 27 [2023-12-18 18:27:36,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-18 18:27:36,818 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:36,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:27:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-18 18:27:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-12-18 18:27:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-12-18 18:27:36,825 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2023-12-18 18:27:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:36,825 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-12-18 18:27:36,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-12-18 18:27:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 18:27:36,826 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:36,826 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:36,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:37,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-18 18:27:37,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:37,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash 497859151, now seen corresponding path program 2 times [2023-12-18 18:27:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:37,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101684499] [2023-12-18 18:27:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:37,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:37,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:37,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101684499] [2023-12-18 18:27:37,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101684499] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:37,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501986015] [2023-12-18 18:27:37,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:27:37,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:37,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:37,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:37,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 18:27:37,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:27:37,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:37,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 18:27:37,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:37,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:27:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:37,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:37,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-18 18:27:37,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:27:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:37,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501986015] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:37,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:37,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-12-18 18:27:37,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991895104] [2023-12-18 18:27:37,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:37,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 18:27:37,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 18:27:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-12-18 18:27:37,423 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:37,543 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-12-18 18:27:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 18:27:37,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-18 18:27:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:37,546 INFO L225 Difference]: With dead ends: 28 [2023-12-18 18:27:37,546 INFO L226 Difference]: Without dead ends: 26 [2023-12-18 18:27:37,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-12-18 18:27:37,547 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:37,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 48 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:27:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-18 18:27:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-12-18 18:27:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-12-18 18:27:37,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2023-12-18 18:27:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:37,552 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-12-18 18:27:37,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-12-18 18:27:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 18:27:37,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:37,553 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:37,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:37,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:37,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:37,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:37,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1204999634, now seen corresponding path program 3 times [2023-12-18 18:27:37,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:37,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490811196] [2023-12-18 18:27:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:37,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:37,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:37,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490811196] [2023-12-18 18:27:37,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490811196] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:37,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283124707] [2023-12-18 18:27:37,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:27:37,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:37,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:37,824 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:37,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 18:27:37,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 18:27:37,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:37,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 18:27:37,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:37,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:37,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283124707] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:37,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:37,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 18:27:37,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144893533] [2023-12-18 18:27:37,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:37,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 18:27:37,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 18:27:37,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-18 18:27:37,955 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:38,019 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-12-18 18:27:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 18:27:38,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-18 18:27:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:38,020 INFO L225 Difference]: With dead ends: 55 [2023-12-18 18:27:38,020 INFO L226 Difference]: Without dead ends: 33 [2023-12-18 18:27:38,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-18 18:27:38,021 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:38,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 42 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:27:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-18 18:27:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-12-18 18:27:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-12-18 18:27:38,024 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2023-12-18 18:27:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:38,024 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-12-18 18:27:38,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-12-18 18:27:38,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-18 18:27:38,024 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:38,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:38,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:38,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:38,230 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:38,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1792242674, now seen corresponding path program 4 times [2023-12-18 18:27:38,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:38,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374539378] [2023-12-18 18:27:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:38,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374539378] [2023-12-18 18:27:38,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374539378] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:38,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982560310] [2023-12-18 18:27:38,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:27:38,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:38,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:38,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 18:27:38,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:27:38,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:38,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-18 18:27:38,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:38,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-18 18:27:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:38,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:38,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-18 18:27:38,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:27:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:38,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982560310] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:38,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:38,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2023-12-18 18:27:38,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324391057] [2023-12-18 18:27:38,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:38,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 18:27:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 18:27:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-12-18 18:27:38,620 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:38,770 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-12-18 18:27:38,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 18:27:38,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2023-12-18 18:27:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:38,771 INFO L225 Difference]: With dead ends: 34 [2023-12-18 18:27:38,771 INFO L226 Difference]: Without dead ends: 32 [2023-12-18 18:27:38,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2023-12-18 18:27:38,772 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:38,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:27:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-18 18:27:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-12-18 18:27:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-12-18 18:27:38,775 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2023-12-18 18:27:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:38,775 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-12-18 18:27:38,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:38,775 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-12-18 18:27:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 18:27:38,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:38,775 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:38,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-18 18:27:38,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:38,982 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:38,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:38,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1968149839, now seen corresponding path program 5 times [2023-12-18 18:27:38,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:38,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375059522] [2023-12-18 18:27:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:38,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:39,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:39,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375059522] [2023-12-18 18:27:39,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375059522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:39,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873282740] [2023-12-18 18:27:39,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:27:39,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:39,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:39,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:39,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 18:27:39,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 18:27:39,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:39,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 18:27:39,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:39,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:39,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873282740] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:39,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:39,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 18:27:39,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917681634] [2023-12-18 18:27:39,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:39,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 18:27:39,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:39,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 18:27:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 18:27:39,236 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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) [2023-12-18 18:27:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:39,337 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2023-12-18 18:27:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 18:27:39,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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) Word has length 27 [2023-12-18 18:27:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:39,339 INFO L225 Difference]: With dead ends: 67 [2023-12-18 18:27:39,339 INFO L226 Difference]: Without dead ends: 39 [2023-12-18 18:27:39,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-18 18:27:39,340 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:39,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 56 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:27:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-18 18:27:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-12-18 18:27:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-12-18 18:27:39,345 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2023-12-18 18:27:39,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:39,345 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-12-18 18:27:39,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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) [2023-12-18 18:27:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-12-18 18:27:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 18:27:39,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:39,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:39,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:39,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:39,551 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:39,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash 229186415, now seen corresponding path program 6 times [2023-12-18 18:27:39,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:39,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432848736] [2023-12-18 18:27:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:39,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:39,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:39,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432848736] [2023-12-18 18:27:39,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432848736] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:39,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101166225] [2023-12-18 18:27:39,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:27:39,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:39,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:39,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:39,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 18:27:39,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-18 18:27:39,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:39,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 18:27:39,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:39,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-18 18:27:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:39,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:40,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-18 18:27:40,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:27:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:40,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101166225] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:40,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:40,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2023-12-18 18:27:40,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905371081] [2023-12-18 18:27:40,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 18:27:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 18:27:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-12-18 18:27:40,025 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:40,242 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-12-18 18:27:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 18:27:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-18 18:27:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:40,244 INFO L225 Difference]: With dead ends: 40 [2023-12-18 18:27:40,244 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 18:27:40,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 18:27:40,246 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:40,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 105 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:27:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 18:27:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2023-12-18 18:27:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-12-18 18:27:40,251 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2023-12-18 18:27:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:40,251 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-12-18 18:27:40,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-12-18 18:27:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-18 18:27:40,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:40,253 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:40,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:40,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:40,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:40,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:40,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1300406094, now seen corresponding path program 7 times [2023-12-18 18:27:40,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:40,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817126795] [2023-12-18 18:27:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:40,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:40,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:40,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817126795] [2023-12-18 18:27:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817126795] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:40,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210063990] [2023-12-18 18:27:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:27:40,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:40,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:40,554 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:40,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 18:27:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:40,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 18:27:40,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:40,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210063990] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:40,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:40,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-18 18:27:40,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230412930] [2023-12-18 18:27:40,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:40,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 18:27:40,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:40,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 18:27:40,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-18 18:27:40,747 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:40,832 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-12-18 18:27:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 18:27:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-18 18:27:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:40,833 INFO L225 Difference]: With dead ends: 79 [2023-12-18 18:27:40,833 INFO L226 Difference]: Without dead ends: 45 [2023-12-18 18:27:40,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-12-18 18:27:40,834 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:40,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 48 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:27:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-18 18:27:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-12-18 18:27:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-12-18 18:27:40,836 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2023-12-18 18:27:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:40,837 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-12-18 18:27:40,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-12-18 18:27:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 18:27:40,837 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:40,837 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:40,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:41,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-18 18:27:41,042 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:41,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash 65130194, now seen corresponding path program 8 times [2023-12-18 18:27:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:41,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880331462] [2023-12-18 18:27:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:41,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:41,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880331462] [2023-12-18 18:27:41,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880331462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:41,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593231588] [2023-12-18 18:27:41,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:27:41,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:41,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:41,288 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:41,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 18:27:41,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:27:41,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:41,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 18:27:41,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:41,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:27:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:41,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:41,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-18 18:27:41,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:27:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:41,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593231588] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:41,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:41,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 29 [2023-12-18 18:27:41,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855627433] [2023-12-18 18:27:41,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:41,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 18:27:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 18:27:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2023-12-18 18:27:41,657 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:41,928 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-12-18 18:27:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-18 18:27:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2023-12-18 18:27:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:41,929 INFO L225 Difference]: With dead ends: 46 [2023-12-18 18:27:41,929 INFO L226 Difference]: Without dead ends: 44 [2023-12-18 18:27:41,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 18:27:41,930 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:41,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:27:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-18 18:27:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2023-12-18 18:27:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-12-18 18:27:41,933 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2023-12-18 18:27:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:41,933 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-12-18 18:27:41,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-12-18 18:27:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 18:27:41,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:41,934 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:41,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:42,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:42,136 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:42,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1026503057, now seen corresponding path program 9 times [2023-12-18 18:27:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143911757] [2023-12-18 18:27:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:42,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143911757] [2023-12-18 18:27:42,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143911757] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942616707] [2023-12-18 18:27:42,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:27:42,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:42,248 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:42,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 18:27:42,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 18:27:42,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:42,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 18:27:42,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:42,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:42,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942616707] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:42,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:42,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 18:27:42,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163889899] [2023-12-18 18:27:42,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:42,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 18:27:42,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 18:27:42,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-18 18:27:42,582 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 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) [2023-12-18 18:27:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:42,675 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2023-12-18 18:27:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 18:27:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 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 39 [2023-12-18 18:27:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:42,676 INFO L225 Difference]: With dead ends: 91 [2023-12-18 18:27:42,676 INFO L226 Difference]: Without dead ends: 51 [2023-12-18 18:27:42,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-12-18 18:27:42,677 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:42,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 55 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:27:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-18 18:27:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2023-12-18 18:27:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 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) [2023-12-18 18:27:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-12-18 18:27:42,683 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2023-12-18 18:27:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:42,683 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-12-18 18:27:42,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 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) [2023-12-18 18:27:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-12-18 18:27:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-18 18:27:42,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:42,684 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:42,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:42,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-18 18:27:42,892 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:42,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:42,893 INFO L85 PathProgramCache]: Analyzing trace with hash 57812111, now seen corresponding path program 10 times [2023-12-18 18:27:42,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:42,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203772882] [2023-12-18 18:27:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:42,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:43,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:43,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203772882] [2023-12-18 18:27:43,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203772882] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:43,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87341770] [2023-12-18 18:27:43,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:27:43,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:43,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:43,116 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:43,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 18:27:43,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:27:43,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:43,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-18 18:27:43,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:43,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-18 18:27:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:43,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:43,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-18 18:27:43,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:27:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:43,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87341770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:43,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:43,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2023-12-18 18:27:43,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469976909] [2023-12-18 18:27:43,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:43,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 18:27:43,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:43,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 18:27:43,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2023-12-18 18:27:43,401 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:43,721 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2023-12-18 18:27:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 18:27:43,721 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-18 18:27:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:43,721 INFO L225 Difference]: With dead ends: 52 [2023-12-18 18:27:43,721 INFO L226 Difference]: Without dead ends: 50 [2023-12-18 18:27:43,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2023-12-18 18:27:43,722 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:43,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 105 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:27:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-18 18:27:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2023-12-18 18:27:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-12-18 18:27:43,725 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2023-12-18 18:27:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:43,725 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-12-18 18:27:43,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-12-18 18:27:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-18 18:27:43,726 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:43,726 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:43,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 18:27:43,931 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:43,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash 3818386, now seen corresponding path program 11 times [2023-12-18 18:27:43,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451185995] [2023-12-18 18:27:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:43,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:44,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:44,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451185995] [2023-12-18 18:27:44,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451185995] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:44,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215467289] [2023-12-18 18:27:44,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:27:44,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:44,077 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:44,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 18:27:44,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-18 18:27:44,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:44,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 18:27:44,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:44,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:44,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215467289] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:44,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:44,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 18:27:44,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824161452] [2023-12-18 18:27:44,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:44,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 18:27:44,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:44,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 18:27:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-18 18:27:44,360 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:44,472 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2023-12-18 18:27:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 18:27:44,473 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-18 18:27:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:44,473 INFO L225 Difference]: With dead ends: 103 [2023-12-18 18:27:44,473 INFO L226 Difference]: Without dead ends: 57 [2023-12-18 18:27:44,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 18:27:44,474 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:44,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 79 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:27:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-18 18:27:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2023-12-18 18:27:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:44,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-12-18 18:27:44,477 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2023-12-18 18:27:44,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:44,478 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-12-18 18:27:44,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-12-18 18:27:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 18:27:44,480 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:44,480 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:44,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:44,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 18:27:44,685 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:44,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2026537394, now seen corresponding path program 12 times [2023-12-18 18:27:44,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:44,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218511228] [2023-12-18 18:27:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:45,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218511228] [2023-12-18 18:27:45,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218511228] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326200980] [2023-12-18 18:27:45,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:27:45,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:45,010 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:45,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 18:27:45,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-18 18:27:45,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:45,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-18 18:27:45,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:45,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-18 18:27:45,749 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 18:27:45,749 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 44 treesize of output 23 [2023-12-18 18:27:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 48 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:45,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:46,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-12-18 18:27:46,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-12-18 18:27:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 43 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:46,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326200980] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:46,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:46,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 49 [2023-12-18 18:27:46,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432880454] [2023-12-18 18:27:46,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:46,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 18:27:46,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 18:27:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2054, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 18:27:46,461 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 49 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 49 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:27:51,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:27:55,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:28:00,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:28:04,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:28:09,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:28:13,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:28:17,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:28:21,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:28:28,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:28:32,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:28:36,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:28:40,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:28:45,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:28:49,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:28:54,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-18 18:28:58,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:02,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:06,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:10,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:14,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:19,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:23,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:27,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:31,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:35,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-18 18:29:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:37,953 INFO L93 Difference]: Finished difference Result 145 states and 158 transitions. [2023-12-18 18:29:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-18 18:29:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 49 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-12-18 18:29:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:37,953 INFO L225 Difference]: With dead ends: 145 [2023-12-18 18:29:37,953 INFO L226 Difference]: Without dead ends: 68 [2023-12-18 18:29:37,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1859, Invalid=12661, Unknown=0, NotChecked=0, Total=14520 [2023-12-18 18:29:37,956 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 267 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 121 mSolverCounterUnsat, 46 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 46 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:37,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 145 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1028 Invalid, 46 Unknown, 0 Unchecked, 109.1s Time] [2023-12-18 18:29:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-18 18:29:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2023-12-18 18:29:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2023-12-18 18:29:37,961 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 48 [2023-12-18 18:29:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:37,961 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2023-12-18 18:29:37,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 49 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2023-12-18 18:29:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-18 18:29:37,961 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:37,961 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:37,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-18 18:29:38,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 18:29:38,166 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:38,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1548446929, now seen corresponding path program 1 times [2023-12-18 18:29:38,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:38,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656140702] [2023-12-18 18:29:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:38,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:29:38,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:38,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656140702] [2023-12-18 18:29:38,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656140702] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:38,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146981002] [2023-12-18 18:29:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:38,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:38,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:38,285 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:29:38,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 18:29:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:38,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 18:29:38,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:29:38,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:29:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:29:38,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146981002] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:29:38,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:29:38,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-12-18 18:29:38,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452959475] [2023-12-18 18:29:38,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:29:38,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-18 18:29:38,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:38,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-18 18:29:38,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2023-12-18 18:29:38,506 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:38,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:38,618 INFO L93 Difference]: Finished difference Result 175 states and 190 transitions. [2023-12-18 18:29:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 18:29:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-18 18:29:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:38,619 INFO L225 Difference]: With dead ends: 175 [2023-12-18 18:29:38,619 INFO L226 Difference]: Without dead ends: 146 [2023-12-18 18:29:38,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2023-12-18 18:29:38,620 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:38,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 60 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:29:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-18 18:29:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 89. [2023-12-18 18:29:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2023-12-18 18:29:38,627 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 57 [2023-12-18 18:29:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:38,627 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2023-12-18 18:29:38,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2023-12-18 18:29:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-18 18:29:38,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:38,627 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:38,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 18:29:38,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:38,832 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:38,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:38,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1829529809, now seen corresponding path program 2 times [2023-12-18 18:29:38,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:38,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411005203] [2023-12-18 18:29:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:38,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:29:39,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:39,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411005203] [2023-12-18 18:29:39,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411005203] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:39,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773523721] [2023-12-18 18:29:39,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:29:39,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:39,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:39,111 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:29:39,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 18:29:39,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:29:39,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:29:39,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 18:29:39,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:29:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:29:39,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:29:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:29:39,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773523721] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:29:39,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:29:39,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2023-12-18 18:29:39,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228328734] [2023-12-18 18:29:39,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:29:39,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 18:29:39,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:29:39,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 18:29:39,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 18:29:39,668 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 41 states, 41 states have (on average 3.1463414634146343) internal successors, (129), 41 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:29:39,929 INFO L93 Difference]: Finished difference Result 335 states and 360 transitions. [2023-12-18 18:29:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-18 18:29:39,929 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1463414634146343) internal successors, (129), 41 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2023-12-18 18:29:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:29:39,930 INFO L225 Difference]: With dead ends: 335 [2023-12-18 18:29:39,930 INFO L226 Difference]: Without dead ends: 306 [2023-12-18 18:29:39,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 18:29:39,931 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 448 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:29:39,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 120 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:29:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-12-18 18:29:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 149. [2023-12-18 18:29:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2023-12-18 18:29:39,942 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 87 [2023-12-18 18:29:39,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:29:39,942 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2023-12-18 18:29:39,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1463414634146343) internal successors, (129), 41 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:29:39,942 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2023-12-18 18:29:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-18 18:29:39,942 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:29:39,942 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:29:39,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 18:29:40,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-18 18:29:40,150 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:29:40,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:29:40,150 INFO L85 PathProgramCache]: Analyzing trace with hash 229335249, now seen corresponding path program 3 times [2023-12-18 18:29:40,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:29:40,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126910155] [2023-12-18 18:29:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:29:40,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:29:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:29:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2339 backedges. 77 proven. 2185 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:29:41,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:29:41,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126910155] [2023-12-18 18:29:41,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126910155] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:29:41,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974258439] [2023-12-18 18:29:41,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:29:41,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:29:41,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:29:41,090 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:29:41,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 18:30:06,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2023-12-18 18:30:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:30:06,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-18 18:30:06,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:30:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2339 backedges. 77 proven. 2185 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:30:06,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:30:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2339 backedges. 77 proven. 2185 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:30:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974258439] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:30:08,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:30:08,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2023-12-18 18:30:08,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793901836] [2023-12-18 18:30:08,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:30:08,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-12-18 18:30:08,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:30:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-12-18 18:30:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2023-12-18 18:30:08,438 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:30:09,487 INFO L93 Difference]: Finished difference Result 655 states and 700 transitions. [2023-12-18 18:30:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-18 18:30:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-12-18 18:30:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:30:09,489 INFO L225 Difference]: With dead ends: 655 [2023-12-18 18:30:09,489 INFO L226 Difference]: Without dead ends: 626 [2023-12-18 18:30:09,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2023-12-18 18:30:09,491 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1112 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:30:09,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1112 Valid, 249 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 18:30:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-12-18 18:30:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 269. [2023-12-18 18:30:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.0149253731343284) internal successors, (272), 268 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 272 transitions. [2023-12-18 18:30:09,509 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 272 transitions. Word has length 147 [2023-12-18 18:30:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:30:09,509 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 272 transitions. [2023-12-18 18:30:09,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 272 transitions. [2023-12-18 18:30:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-12-18 18:30:09,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:30:09,510 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 78, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:30:09,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 18:30:09,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 18:30:09,723 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:30:09,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:30:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash 341659857, now seen corresponding path program 4 times [2023-12-18 18:30:09,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:30:09,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124588931] [2023-12-18 18:30:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:30:09,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:30:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:30:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9399 backedges. 157 proven. 9165 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:30:12,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:30:12,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124588931] [2023-12-18 18:30:12,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124588931] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:30:12,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51936898] [2023-12-18 18:30:12,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:30:12,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:12,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:30:13,000 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:30:13,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 18:30:13,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:30:13,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:30:13,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-18 18:30:13,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:30:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9399 backedges. 157 proven. 9165 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:30:13,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:30:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9399 backedges. 157 proven. 9165 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:30:19,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51936898] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:30:19,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:30:19,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 161 [2023-12-18 18:30:19,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999426263] [2023-12-18 18:30:19,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:30:19,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2023-12-18 18:30:19,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:30:19,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2023-12-18 18:30:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2023-12-18 18:30:19,169 INFO L87 Difference]: Start difference. First operand 269 states and 272 transitions. Second operand has 161 states, 161 states have (on average 3.0372670807453415) internal successors, (489), 161 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:30:26,319 INFO L93 Difference]: Finished difference Result 1295 states and 1380 transitions. [2023-12-18 18:30:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2023-12-18 18:30:26,319 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 3.0372670807453415) internal successors, (489), 161 states have internal predecessors, (489), 0 states have call successors, (0), 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 267 [2023-12-18 18:30:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:30:26,322 INFO L225 Difference]: With dead ends: 1295 [2023-12-18 18:30:26,322 INFO L226 Difference]: Without dead ends: 1266 [2023-12-18 18:30:26,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2023-12-18 18:30:26,324 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3362 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:30:26,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3362 Valid, 484 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-18 18:30:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2023-12-18 18:30:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 509. [2023-12-18 18:30:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.0078740157480315) internal successors, (512), 508 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 512 transitions. [2023-12-18 18:30:26,359 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 512 transitions. Word has length 267 [2023-12-18 18:30:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:30:26,359 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 512 transitions. [2023-12-18 18:30:26,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 3.0372670807453415) internal successors, (489), 161 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:30:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 512 transitions. [2023-12-18 18:30:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2023-12-18 18:30:26,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:30:26,363 INFO L195 NwaCegarLoop]: trace histogram [159, 159, 158, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:30:26,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-18 18:30:26,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:26,569 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:30:26,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:30:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash -7261999, now seen corresponding path program 5 times [2023-12-18 18:30:26,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:30:26,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899498767] [2023-12-18 18:30:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:30:26,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:30:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:30:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 37919 backedges. 317 proven. 37525 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 18:30:39,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:30:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899498767] [2023-12-18 18:30:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899498767] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:30:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930371640] [2023-12-18 18:30:39,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:30:39,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:30:39,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:30:39,287 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:30:39,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 18:42:10,728 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 18:42:10,728 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 [2023-12-18 18:42:11,747 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 [2023-12-18 18:42:11,928 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forcibly destroying the process [2023-12-18 18:42:11,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 18:42:11,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 18:42:11,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2023-12-18 18:42:11,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422315780] [2023-12-18 18:42:11,946 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 18:42:11,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2023-12-18 18:42:11,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2023-12-18 18:42:11,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 137 [2023-12-18 18:42:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2023-12-18 18:42:11,954 INFO L87 Difference]: Start difference. First operand 509 states and 512 transitions. Second operand has 161 states, 161 states have (on average 3.031055900621118) internal successors, (488), 161 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:42:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:42:11,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2023-12-18 18:42:11,957 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 [2023-12-18 18:42:11,957 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] [2023-12-18 18:42:11,958 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 18:42:11,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-18 18:42:11,959 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (509states) and FLOYD_HOARE automaton (currently 2 states, 161 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-18 18:42:11,962 INFO L445 BasicCegarLoop]: Path program histogram: [12, 5, 1, 1, 1] [2023-12-18 18:42:11,964 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 18:42:11,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 06:42:11 BoogieIcfgContainer [2023-12-18 18:42:11,965 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 18:42:11,966 INFO L158 Benchmark]: Toolchain (without parser) took 877110.17ms. Allocated memory was 287.3MB in the beginning and 1.2GB in the end (delta: 951.1MB). Free memory was 236.2MB in the beginning and 576.7MB in the end (delta: -340.5MB). Peak memory consumption was 612.1MB. Max. memory is 8.0GB. [2023-12-18 18:42:11,966 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 211.8MB. Free memory is still 161.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 18:42:11,966 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.30ms. Allocated memory is still 287.3MB. Free memory was 236.0MB in the beginning and 225.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-18 18:42:11,966 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.15ms. Allocated memory is still 287.3MB. Free memory was 225.0MB in the beginning and 223.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:42:11,966 INFO L158 Benchmark]: Boogie Preprocessor took 24.56ms. Allocated memory is still 287.3MB. Free memory was 223.4MB in the beginning and 221.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:42:11,966 INFO L158 Benchmark]: RCFGBuilder took 176.63ms. Allocated memory is still 287.3MB. Free memory was 221.3MB in the beginning and 209.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 18:42:11,966 INFO L158 Benchmark]: TraceAbstraction took 876720.32ms. Allocated memory was 287.3MB in the beginning and 1.2GB in the end (delta: 951.1MB). Free memory was 209.0MB in the beginning and 576.7MB in the end (delta: -367.7MB). Peak memory consumption was 584.9MB. Max. memory is 8.0GB. [2023-12-18 18:42:11,967 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 211.8MB. Free memory is still 161.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 158.30ms. Allocated memory is still 287.3MB. Free memory was 236.0MB in the beginning and 225.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.15ms. Allocated memory is still 287.3MB. Free memory was 225.0MB in the beginning and 223.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.56ms. Allocated memory is still 287.3MB. Free memory was 223.4MB in the beginning and 221.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 176.63ms. Allocated memory is still 287.3MB. Free memory was 221.3MB in the beginning and 209.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 876720.32ms. Allocated memory was 287.3MB in the beginning and 1.2GB in the end (delta: 951.1MB). Free memory was 209.0MB in the beginning and 576.7MB in the end (delta: -367.7MB). Peak memory consumption was 584.9MB. 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: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was constructing difference of abstraction (509states) and FLOYD_HOARE automaton (currently 2 states, 161 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 876.7s, OverallIterations: 20, TraceHistogramMax: 159, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 121.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 mSolverCounterUnknown, 5638 SdHoareTripleChecker+Valid, 111.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5638 mSDsluCounter, 1852 SdHoareTripleChecker+Invalid, 111.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1663 mSDsCounter, 1634 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5018 IncrementalHoareTripleChecker+Invalid, 6698 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1634 mSolverCounterUnsat, 189 mSDtfsCounter, 5018 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2496 GetRequests, 1572 SyntacticMatches, 55 SemanticMatches, 869 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6974 ImplicationChecksByTransitivity, 22.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=509occurred in iteration=19, InterpolantAutomatonStates: 576, 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, 19 MinimizatonAttempts, 1403 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 26.5s SatisfiabilityAnalysisTime, 30.8s InterpolantComputationTime, 2421 NumberOfCodeBlocks, 2421 NumberOfCodeBlocksAsserted, 109 NumberOfCheckSat, 3315 ConstructedInterpolants, 42 QuantifiedInterpolants, 12577 SizeOfPredicates, 112 NumberOfNonLiveVariables, 3484 ConjunctsInSsa, 418 ConjunctsInUnsatCore, 54 InterpolantComputations, 2 PerfectInterpolantSequences, 2663/77390 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