/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/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 21:56:16,425 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 21:56:16,487 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 21:56:16,490 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 21:56:16,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 21:56:16,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 21:56:16,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 21:56:16,518 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 21:56:16,519 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 21:56:16,521 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 21:56:16,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 21:56:16,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 21:56:16,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 21:56:16,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 21:56:16,523 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 21:56:16,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 21:56:16,524 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 21:56:16,524 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 21:56:16,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 21:56:16,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 21:56:16,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 21:56:16,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 21:56:16,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 21:56:16,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 21:56:16,525 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 21:56:16,525 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 21:56:16,525 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 21:56:16,525 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 21:56:16,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 21:56:16,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 21:56:16,527 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 21:56:16,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 21:56:16,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:56:16,527 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 21:56:16,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 21:56:16,527 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 21:56:16,527 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 21:56:16,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 21:56:16,528 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 21:56:16,528 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 21:56:16,528 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 21:56:16,528 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 21:56:16,528 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 21:56:16,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 21:56:16,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 21:56:16,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 21:56:16,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 21:56:16,716 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 21:56:16,716 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 21:56:16,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2023-12-18 21:56:17,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 21:56:17,959 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 21:56:17,959 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2023-12-18 21:56:17,964 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8109777/dee2cebf87934fe492e8207b66bb08c7/FLAG0212b4e46 [2023-12-18 21:56:17,973 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8109777/dee2cebf87934fe492e8207b66bb08c7 [2023-12-18 21:56:17,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 21:56:17,975 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 21:56:17,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 21:56:17,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 21:56:17,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 21:56:17,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:56:17" (1/1) ... [2023-12-18 21:56:17,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a3ae1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:17, skipping insertion in model container [2023-12-18 21:56:17,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:56:17" (1/1) ... [2023-12-18 21:56:18,004 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 21:56:18,097 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c[728,741] [2023-12-18 21:56:18,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:56:18,142 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 21:56:18,149 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c[728,741] [2023-12-18 21:56:18,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:56:18,176 INFO L206 MainTranslator]: Completed translation [2023-12-18 21:56:18,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18 WrapperNode [2023-12-18 21:56:18,176 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 21:56:18,177 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 21:56:18,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 21:56:18,177 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 21:56:18,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,186 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,200 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2023-12-18 21:56:18,200 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 21:56:18,200 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 21:56:18,200 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 21:56:18,201 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 21:56:18,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,216 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-18 21:56:18,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,220 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,224 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,226 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 21:56:18,227 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 21:56:18,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 21:56:18,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 21:56:18,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (1/1) ... [2023-12-18 21:56:18,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:56:18,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:18,247 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 21:56:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 21:56:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 21:56:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-18 21:56:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-18 21:56:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 21:56:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 21:56:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-18 21:56:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-18 21:56:18,284 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 21:56:18,362 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 21:56:18,364 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 21:56:18,584 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 21:56:18,601 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 21:56:18,601 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-18 21:56:18,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:56:18 BoogieIcfgContainer [2023-12-18 21:56:18,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 21:56:18,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 21:56:18,603 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 21:56:18,605 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 21:56:18,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:56:17" (1/3) ... [2023-12-18 21:56:18,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c94bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:56:18, skipping insertion in model container [2023-12-18 21:56:18,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:18" (2/3) ... [2023-12-18 21:56:18,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c94bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:56:18, skipping insertion in model container [2023-12-18 21:56:18,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:56:18" (3/3) ... [2023-12-18 21:56:18,607 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2023-12-18 21:56:18,618 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 21:56:18,618 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 21:56:18,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 21:56:18,651 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;@8039c7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 21:56:18,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 21:56:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 57 states have internal predecessors, (91), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 21:56:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 21:56:18,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:18,660 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:18,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:18,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:18,663 INFO L85 PathProgramCache]: Analyzing trace with hash 118527197, now seen corresponding path program 1 times [2023-12-18 21:56:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:18,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163879415] [2023-12-18 21:56:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 21:56:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:18,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:18,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163879415] [2023-12-18 21:56:18,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163879415] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:18,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:18,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 21:56:18,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952842483] [2023-12-18 21:56:18,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:18,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:56:18,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:18,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:56:18,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:18,946 INFO L87 Difference]: Start difference. First operand has 64 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 57 states have internal predecessors, (91), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:19,004 INFO L93 Difference]: Finished difference Result 150 states and 244 transitions. [2023-12-18 21:56:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:56:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2023-12-18 21:56:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:19,011 INFO L225 Difference]: With dead ends: 150 [2023-12-18 21:56:19,011 INFO L226 Difference]: Without dead ends: 60 [2023-12-18 21:56:19,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:19,016 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 32 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:19,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 175 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-18 21:56:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-18 21:56:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.490566037735849) internal successors, (79), 53 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 21:56:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 88 transitions. [2023-12-18 21:56:19,050 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 88 transitions. Word has length 36 [2023-12-18 21:56:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:19,051 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 88 transitions. [2023-12-18 21:56:19,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 88 transitions. [2023-12-18 21:56:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 21:56:19,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:19,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 21:56:19,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:19,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1988208739, now seen corresponding path program 1 times [2023-12-18 21:56:19,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:19,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243456547] [2023-12-18 21:56:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:19,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 21:56:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:19,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:19,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243456547] [2023-12-18 21:56:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243456547] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:19,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:19,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:56:19,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057411422] [2023-12-18 21:56:19,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:19,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:19,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:19,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:56:19,148 INFO L87 Difference]: Start difference. First operand 60 states and 88 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:19,185 INFO L93 Difference]: Finished difference Result 92 states and 134 transitions. [2023-12-18 21:56:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:56:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2023-12-18 21:56:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:19,187 INFO L225 Difference]: With dead ends: 92 [2023-12-18 21:56:19,187 INFO L226 Difference]: Without dead ends: 60 [2023-12-18 21:56:19,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 21:56:19,189 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 67 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:19,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 249 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-18 21:56:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-18 21:56:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.471698113207547) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 21:56:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2023-12-18 21:56:19,194 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 38 [2023-12-18 21:56:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:19,194 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2023-12-18 21:56:19,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2023-12-18 21:56:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 21:56:19,195 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:19,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:19,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 21:56:19,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:19,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2048593119, now seen corresponding path program 1 times [2023-12-18 21:56:19,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:19,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200294053] [2023-12-18 21:56:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:19,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 21:56:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:19,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:19,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200294053] [2023-12-18 21:56:19,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200294053] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:19,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186400186] [2023-12-18 21:56:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:19,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:19,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:19,365 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 21:56:19,416 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 21:56:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 21:56:19,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:19,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:19,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186400186] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:19,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:19,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 6] total 13 [2023-12-18 21:56:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347155357] [2023-12-18 21:56:19,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:19,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 21:56:19,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 21:56:19,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:56:19,728 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand has 13 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-18 21:56:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:20,108 INFO L93 Difference]: Finished difference Result 229 states and 374 transitions. [2023-12-18 21:56:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 21:56:20,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 38 [2023-12-18 21:56:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:20,116 INFO L225 Difference]: With dead ends: 229 [2023-12-18 21:56:20,116 INFO L226 Difference]: Without dead ends: 172 [2023-12-18 21:56:20,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2023-12-18 21:56:20,119 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 305 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:20,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 487 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:56:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-18 21:56:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 114. [2023-12-18 21:56:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 101 states have (on average 1.4554455445544554) internal successors, (147), 101 states have internal predecessors, (147), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2023-12-18 21:56:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 172 transitions. [2023-12-18 21:56:20,152 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 172 transitions. Word has length 38 [2023-12-18 21:56:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:20,152 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 172 transitions. [2023-12-18 21:56:20,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-18 21:56:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 172 transitions. [2023-12-18 21:56:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 21:56:20,154 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:20,154 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:20,160 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 21:56:20,359 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 21:56:20,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:20,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:20,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1641733911, now seen corresponding path program 1 times [2023-12-18 21:56:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133612900] [2023-12-18 21:56:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:20,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 21:56:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:20,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:20,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133612900] [2023-12-18 21:56:20,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133612900] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:20,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136477693] [2023-12-18 21:56:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:20,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:20,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:20,428 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 21:56:20,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 21:56:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 21:56:20,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:56:20,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:20,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136477693] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:20,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:20,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-18 21:56:20,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722125639] [2023-12-18 21:56:20,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:20,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:20,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-18 21:56:20,497 INFO L87 Difference]: Start difference. First operand 114 states and 172 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:20,546 INFO L93 Difference]: Finished difference Result 232 states and 352 transitions. [2023-12-18 21:56:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:56:20,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2023-12-18 21:56:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:20,548 INFO L225 Difference]: With dead ends: 232 [2023-12-18 21:56:20,548 INFO L226 Difference]: Without dead ends: 128 [2023-12-18 21:56:20,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:56:20,549 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 18 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:20,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 203 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-18 21:56:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-12-18 21:56:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 113 states have (on average 1.4513274336283186) internal successors, (164), 115 states have internal predecessors, (164), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-18 21:56:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 194 transitions. [2023-12-18 21:56:20,557 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 194 transitions. Word has length 43 [2023-12-18 21:56:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:20,558 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 194 transitions. [2023-12-18 21:56:20,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 194 transitions. [2023-12-18 21:56:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 21:56:20,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:20,559 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:20,577 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 21:56:20,764 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 21:56:20,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:20,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2142274137, now seen corresponding path program 1 times [2023-12-18 21:56:20,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:20,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716417852] [2023-12-18 21:56:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:20,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 21:56:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-18 21:56:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:20,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:20,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716417852] [2023-12-18 21:56:20,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716417852] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:20,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106523434] [2023-12-18 21:56:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:20,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:20,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:20,824 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 21:56:20,856 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 21:56:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 21:56:20,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 21:56:20,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:20,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106523434] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:20,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:20,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-18 21:56:20,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489089940] [2023-12-18 21:56:20,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:20,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:56:20,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:56:20,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:56:20,972 INFO L87 Difference]: Start difference. First operand 128 states and 194 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 21:56:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:21,095 INFO L93 Difference]: Finished difference Result 330 states and 532 transitions. [2023-12-18 21:56:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:56:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2023-12-18 21:56:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:21,100 INFO L225 Difference]: With dead ends: 330 [2023-12-18 21:56:21,100 INFO L226 Difference]: Without dead ends: 218 [2023-12-18 21:56:21,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:56:21,101 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 195 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:21,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 315 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-18 21:56:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 155. [2023-12-18 21:56:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 140 states have (on average 1.4714285714285715) internal successors, (206), 142 states have internal predecessors, (206), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-18 21:56:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 236 transitions. [2023-12-18 21:56:21,131 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 236 transitions. Word has length 46 [2023-12-18 21:56:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:21,131 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 236 transitions. [2023-12-18 21:56:21,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-18 21:56:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 236 transitions. [2023-12-18 21:56:21,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 21:56:21,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:21,133 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:21,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-18 21:56:21,337 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 21:56:21,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:21,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash -335740599, now seen corresponding path program 1 times [2023-12-18 21:56:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:21,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825067044] [2023-12-18 21:56:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:21,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 21:56:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-18 21:56:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:21,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:21,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825067044] [2023-12-18 21:56:21,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825067044] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:21,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951778781] [2023-12-18 21:56:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:21,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:21,373 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 21:56:21,387 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 21:56:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 21:56:21,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 21:56:21,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:21,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951778781] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:21,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:21,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2023-12-18 21:56:21,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653677115] [2023-12-18 21:56:21,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:21,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:56:21,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:21,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:56:21,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:21,462 INFO L87 Difference]: Start difference. First operand 155 states and 236 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:21,500 INFO L93 Difference]: Finished difference Result 290 states and 462 transitions. [2023-12-18 21:56:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:56:21,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-12-18 21:56:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:21,502 INFO L225 Difference]: With dead ends: 290 [2023-12-18 21:56:21,502 INFO L226 Difference]: Without dead ends: 160 [2023-12-18 21:56:21,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:21,503 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 8 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:21,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:21,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-18 21:56:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2023-12-18 21:56:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 140 states have (on average 1.45) internal successors, (203), 142 states have internal predecessors, (203), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-18 21:56:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 233 transitions. [2023-12-18 21:56:21,517 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 233 transitions. Word has length 48 [2023-12-18 21:56:21,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:21,517 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 233 transitions. [2023-12-18 21:56:21,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:21,517 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 233 transitions. [2023-12-18 21:56:21,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 21:56:21,518 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:21,519 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:21,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-18 21:56:21,723 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 21:56:21,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:21,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:21,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1769030139, now seen corresponding path program 1 times [2023-12-18 21:56:21,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:21,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746170410] [2023-12-18 21:56:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 21:56:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:21,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:21,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746170410] [2023-12-18 21:56:21,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746170410] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:21,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071371092] [2023-12-18 21:56:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:21,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:21,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:21,808 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 21:56:21,845 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 21:56:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 21:56:21,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:21,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:21,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071371092] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:21,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:56:21,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 6] total 10 [2023-12-18 21:56:21,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596746955] [2023-12-18 21:56:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:21,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:21,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:56:21,958 INFO L87 Difference]: Start difference. First operand 155 states and 233 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:21,982 INFO L93 Difference]: Finished difference Result 170 states and 249 transitions. [2023-12-18 21:56:21,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:56:21,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-12-18 21:56:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:22,004 INFO L225 Difference]: With dead ends: 170 [2023-12-18 21:56:22,005 INFO L226 Difference]: Without dead ends: 164 [2023-12-18 21:56:22,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:56:22,005 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 3 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:22,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 235 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-18 21:56:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2023-12-18 21:56:22,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 147 states have (on average 1.435374149659864) internal successors, (211), 149 states have internal predecessors, (211), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-18 21:56:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 241 transitions. [2023-12-18 21:56:22,016 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 241 transitions. Word has length 49 [2023-12-18 21:56:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:22,016 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 241 transitions. [2023-12-18 21:56:22,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 241 transitions. [2023-12-18 21:56:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 21:56:22,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:22,017 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:22,023 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 21:56:22,217 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 21:56:22,217 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:22,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:22,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1826288441, now seen corresponding path program 1 times [2023-12-18 21:56:22,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:22,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668250306] [2023-12-18 21:56:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:22,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 21:56:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:22,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:22,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668250306] [2023-12-18 21:56:22,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668250306] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:22,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:22,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-18 21:56:22,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011208804] [2023-12-18 21:56:22,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:22,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 21:56:22,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 21:56:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-18 21:56:22,285 INFO L87 Difference]: Start difference. First operand 162 states and 241 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:22,310 INFO L93 Difference]: Finished difference Result 168 states and 246 transitions. [2023-12-18 21:56:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:56:22,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-12-18 21:56:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:22,313 INFO L225 Difference]: With dead ends: 168 [2023-12-18 21:56:22,313 INFO L226 Difference]: Without dead ends: 158 [2023-12-18 21:56:22,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-18 21:56:22,314 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:22,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-18 21:56:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2023-12-18 21:56:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 143 states have (on average 1.4195804195804196) internal successors, (203), 145 states have internal predecessors, (203), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-18 21:56:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 233 transitions. [2023-12-18 21:56:22,322 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 233 transitions. Word has length 49 [2023-12-18 21:56:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:22,322 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 233 transitions. [2023-12-18 21:56:22,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 233 transitions. [2023-12-18 21:56:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-18 21:56:22,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:22,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:22,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-18 21:56:22,324 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:22,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash -456272409, now seen corresponding path program 1 times [2023-12-18 21:56:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:22,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877732165] [2023-12-18 21:56:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:22,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 21:56:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:22,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:22,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877732165] [2023-12-18 21:56:22,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877732165] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:22,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056925009] [2023-12-18 21:56:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:22,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:22,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:22,479 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 21:56:22,482 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 21:56:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:56:22,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:22,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:22,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056925009] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:22,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:22,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 8] total 18 [2023-12-18 21:56:22,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119394166] [2023-12-18 21:56:22,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:22,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 21:56:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:22,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 21:56:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2023-12-18 21:56:22,695 INFO L87 Difference]: Start difference. First operand 158 states and 233 transitions. Second operand has 18 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:56:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:23,028 INFO L93 Difference]: Finished difference Result 269 states and 402 transitions. [2023-12-18 21:56:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 21:56:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 54 [2023-12-18 21:56:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:23,029 INFO L225 Difference]: With dead ends: 269 [2023-12-18 21:56:23,029 INFO L226 Difference]: Without dead ends: 105 [2023-12-18 21:56:23,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2023-12-18 21:56:23,030 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 40 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:23,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 845 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:56:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-18 21:56:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2023-12-18 21:56:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 81 states have (on average 1.382716049382716) internal successors, (112), 83 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:56:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 127 transitions. [2023-12-18 21:56:23,036 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 127 transitions. Word has length 54 [2023-12-18 21:56:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:23,036 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 127 transitions. [2023-12-18 21:56:23,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 21:56:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 127 transitions. [2023-12-18 21:56:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-18 21:56:23,037 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:23,037 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:23,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-18 21:56:23,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:23,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:23,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:23,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2022456856, now seen corresponding path program 1 times [2023-12-18 21:56:23,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:23,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338975868] [2023-12-18 21:56:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:23,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-18 21:56:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-18 21:56:23,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:23,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338975868] [2023-12-18 21:56:23,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338975868] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:23,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:23,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-18 21:56:23,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3543350] [2023-12-18 21:56:23,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:23,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 21:56:23,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:23,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 21:56:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:56:23,354 INFO L87 Difference]: Start difference. First operand 92 states and 127 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:23,386 INFO L93 Difference]: Finished difference Result 128 states and 173 transitions. [2023-12-18 21:56:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 21:56:23,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2023-12-18 21:56:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:23,387 INFO L225 Difference]: With dead ends: 128 [2023-12-18 21:56:23,387 INFO L226 Difference]: Without dead ends: 90 [2023-12-18 21:56:23,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:56:23,388 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:23,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 461 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:23,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-18 21:56:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-12-18 21:56:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 80 states have (on average 1.3375) internal successors, (107), 81 states have internal predecessors, (107), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-18 21:56:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2023-12-18 21:56:23,402 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 58 [2023-12-18 21:56:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:23,403 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2023-12-18 21:56:23,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2023-12-18 21:56:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 21:56:23,403 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:23,403 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:23,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-18 21:56:23,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:23,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:23,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1102803079, now seen corresponding path program 2 times [2023-12-18 21:56:23,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:23,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931621587] [2023-12-18 21:56:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:23,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-18 21:56:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 21:56:23,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931621587] [2023-12-18 21:56:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931621587] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741718188] [2023-12-18 21:56:23,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:56:23,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:23,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:23,580 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 21:56:23,610 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 21:56:23,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-18 21:56:23,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:56:23,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-18 21:56:23,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:23,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:23,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741718188] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:23,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:23,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2023-12-18 21:56:23,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789480746] [2023-12-18 21:56:23,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:23,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 21:56:23,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:23,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 21:56:23,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:56:23,685 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:23,792 INFO L93 Difference]: Finished difference Result 169 states and 228 transitions. [2023-12-18 21:56:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 21:56:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-12-18 21:56:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:23,793 INFO L225 Difference]: With dead ends: 169 [2023-12-18 21:56:23,793 INFO L226 Difference]: Without dead ends: 143 [2023-12-18 21:56:23,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-12-18 21:56:23,793 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 127 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:23,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 688 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-18 21:56:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 100. [2023-12-18 21:56:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 90 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-18 21:56:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2023-12-18 21:56:23,798 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 62 [2023-12-18 21:56:23,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:23,798 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2023-12-18 21:56:23,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2023-12-18 21:56:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 21:56:23,799 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:23,799 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:23,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-18 21:56:24,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:24,004 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:24,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:24,005 INFO L85 PathProgramCache]: Analyzing trace with hash 81734725, now seen corresponding path program 1 times [2023-12-18 21:56:24,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:24,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896164711] [2023-12-18 21:56:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:24,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-18 21:56:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 21:56:24,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:24,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896164711] [2023-12-18 21:56:24,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896164711] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:24,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716953761] [2023-12-18 21:56:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:24,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:24,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:24,195 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 21:56:24,224 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 21:56:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 21:56:24,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:24,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 21:56:24,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716953761] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:24,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:24,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-12-18 21:56:24,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957371159] [2023-12-18 21:56:24,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:24,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-18 21:56:24,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:24,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-18 21:56:24,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-12-18 21:56:24,499 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 21 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-18 21:56:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:24,598 INFO L93 Difference]: Finished difference Result 145 states and 190 transitions. [2023-12-18 21:56:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:56:24,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 62 [2023-12-18 21:56:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:24,599 INFO L225 Difference]: With dead ends: 145 [2023-12-18 21:56:24,599 INFO L226 Difference]: Without dead ends: 100 [2023-12-18 21:56:24,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:56:24,600 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 45 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:24,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1116 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-18 21:56:24,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-12-18 21:56:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 90 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 21:56:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2023-12-18 21:56:24,604 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 62 [2023-12-18 21:56:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:24,604 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2023-12-18 21:56:24,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-18 21:56:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2023-12-18 21:56:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-18 21:56:24,605 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:24,605 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:24,626 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 21:56:24,810 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,SelfDestructingSolverStorable11 [2023-12-18 21:56:24,810 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:24,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:24,810 INFO L85 PathProgramCache]: Analyzing trace with hash -256676432, now seen corresponding path program 1 times [2023-12-18 21:56:24,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:24,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517924466] [2023-12-18 21:56:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:24,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-18 21:56:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-18 21:56:24,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:24,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517924466] [2023-12-18 21:56:24,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517924466] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:24,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960584379] [2023-12-18 21:56:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:24,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:24,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:24,844 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 21:56:24,887 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 21:56:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 21:56:24,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:24,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:24,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960584379] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:24,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:24,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2023-12-18 21:56:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528401756] [2023-12-18 21:56:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:24,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:56:24,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:56:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:24,915 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:24,938 INFO L93 Difference]: Finished difference Result 190 states and 247 transitions. [2023-12-18 21:56:24,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:56:24,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2023-12-18 21:56:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:24,939 INFO L225 Difference]: With dead ends: 190 [2023-12-18 21:56:24,939 INFO L226 Difference]: Without dead ends: 100 [2023-12-18 21:56:24,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:24,940 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:24,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 135 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-18 21:56:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-12-18 21:56:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 21:56:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2023-12-18 21:56:24,944 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 66 [2023-12-18 21:56:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:24,944 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2023-12-18 21:56:24,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2023-12-18 21:56:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-18 21:56:24,945 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:24,945 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:24,951 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 21:56:25,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 21:56:25,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:25,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:25,149 INFO L85 PathProgramCache]: Analyzing trace with hash 402855090, now seen corresponding path program 1 times [2023-12-18 21:56:25,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:25,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366564567] [2023-12-18 21:56:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:25,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-18 21:56:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:25,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:25,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366564567] [2023-12-18 21:56:25,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366564567] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:25,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123279978] [2023-12-18 21:56:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:25,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:25,233 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 21:56:25,265 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 21:56:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-18 21:56:25,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-18 21:56:25,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:25,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123279978] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:25,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:25,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2023-12-18 21:56:25,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887639503] [2023-12-18 21:56:25,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:25,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:56:25,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:25,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:56:25,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:56:25,382 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:25,499 INFO L93 Difference]: Finished difference Result 156 states and 203 transitions. [2023-12-18 21:56:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:56:25,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2023-12-18 21:56:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:25,500 INFO L225 Difference]: With dead ends: 156 [2023-12-18 21:56:25,500 INFO L226 Difference]: Without dead ends: 123 [2023-12-18 21:56:25,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:56:25,501 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 122 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:25,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 630 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-18 21:56:25,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2023-12-18 21:56:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 90 states have internal predecessors, (115), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 21:56:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-12-18 21:56:25,505 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 66 [2023-12-18 21:56:25,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:25,506 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-12-18 21:56:25,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-18 21:56:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-12-18 21:56:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-18 21:56:25,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:25,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:25,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-18 21:56:25,710 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,SelfDestructingSolverStorable13 [2023-12-18 21:56:25,710 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:25,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:25,711 INFO L85 PathProgramCache]: Analyzing trace with hash -60336671, now seen corresponding path program 1 times [2023-12-18 21:56:25,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:25,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257406895] [2023-12-18 21:56:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:25,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-18 21:56:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-18 21:56:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:56:25,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257406895] [2023-12-18 21:56:25,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257406895] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690737293] [2023-12-18 21:56:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:25,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:25,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:25,823 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 21:56:25,855 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 21:56:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:25,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-18 21:56:25,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-18 21:56:25,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-18 21:56:26,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690737293] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:26,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:26,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 12] total 20 [2023-12-18 21:56:26,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671006522] [2023-12-18 21:56:26,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:26,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:56:26,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:56:26,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:56:26,151 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 20 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-18 21:56:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:26,474 INFO L93 Difference]: Finished difference Result 177 states and 226 transitions. [2023-12-18 21:56:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 21:56:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) Word has length 67 [2023-12-18 21:56:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:26,474 INFO L225 Difference]: With dead ends: 177 [2023-12-18 21:56:26,474 INFO L226 Difference]: Without dead ends: 0 [2023-12-18 21:56:26,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:56:26,475 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 152 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:26,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 187 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-18 21:56:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-18 21:56:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states 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 21:56:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-18 21:56:26,476 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2023-12-18 21:56:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:26,476 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-18 21:56:26,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-18 21:56:26,476 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-18 21:56:26,476 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-18 21:56:26,478 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 21:56:26,484 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 21:56:26,682 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,SelfDestructingSolverStorable14 [2023-12-18 21:56:26,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-18 21:56:26,953 INFO L899 garLoopResultBuilder]: For program point L77(line 77) no Hoare annotation was computed. [2023-12-18 21:56:26,953 INFO L899 garLoopResultBuilder]: For program point L77-2(line 77) no Hoare annotation was computed. [2023-12-18 21:56:26,953 INFO L899 garLoopResultBuilder]: For program point L77-4(line 77) no Hoare annotation was computed. [2023-12-18 21:56:26,954 INFO L895 garLoopResultBuilder]: At program point L57-2(lines 57 72) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (< 0 (mod |base2flt_#in~m| 4294967296)) (not (= |base2flt_#in~m| 1))) [2023-12-18 21:56:26,954 INFO L899 garLoopResultBuilder]: For program point $Ultimate##27(line 76) no Hoare annotation was computed. [2023-12-18 21:56:26,954 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 34) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L58(lines 57 72) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L79(lines 28 81) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 24 82) the Hoare annotation is: true [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L38(lines 37 52) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L59(lines 57 72) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point base2fltEXIT(lines 24 82) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L47(lines 47 51) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L895 garLoopResultBuilder]: At program point L47-1(lines 37 52) the Hoare annotation is: (and (let ((.cse0 (<= base2flt_~m (+ 16777215 (* (div base2flt_~m 4294967296) 4294967296))))) (or (and .cse0 (<= base2flt_~m 33554430) (<= 0 base2flt_~m)) (and (= base2flt_~m |base2flt_#in~m|) .cse0 (<= |base2flt_#in~e| base2flt_~e) (or (= base2flt_~e |base2flt_#in~e|) (= base2flt_~e 0))))) (< 0 (mod |base2flt_#in~m| 4294967296))) [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L76-1(line 76) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L76-3(line 76) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 75) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L176(line 176) no Hoare annotation was computed. [2023-12-18 21:56:26,955 INFO L899 garLoopResultBuilder]: For program point L176-2(line 176) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L176-4(line 176) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L185(lines 185 190) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L243(lines 243 252) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L243-2(lines 243 252) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L260(lines 260 264) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L194(lines 194 211) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L260-2(lines 260 264) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L194-2(lines 194 211) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L203(lines 203 208) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L195(lines 195 200) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L179(lines 179 184) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L246(lines 246 250) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L213(line 213) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L246-2(lines 246 250) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L213-2(line 213) no Hoare annotation was computed. [2023-12-18 21:56:26,956 INFO L899 garLoopResultBuilder]: For program point L213-4(line 213) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L902 garLoopResultBuilder]: At program point L238(line 238) the Hoare annotation is: true [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L238-1(line 238) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L214(line 214) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L214-2(line 214) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L214-4(line 214) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L895 garLoopResultBuilder]: At program point L239(line 239) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L239-1(line 239) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L173(line 173) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L173-2(line 173) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L173-4(line 173) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L256(lines 256 272) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L256-1(lines 256 272) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L895 garLoopResultBuilder]: At program point L240(line 240) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L240-1(line 240) no Hoare annotation was computed. [2023-12-18 21:56:26,957 INFO L899 garLoopResultBuilder]: For program point L257(lines 257 266) no Hoare annotation was computed. [2023-12-18 21:56:26,958 INFO L895 garLoopResultBuilder]: At program point L257-2(lines 257 266) the Hoare annotation is: (and (= 0 |ULTIMATE.start_main_~tmp___1~0#1|) (= 0 |ULTIMATE.start_main_~tmp___0~0#1|)) [2023-12-18 21:56:26,958 INFO L899 garLoopResultBuilder]: For program point L158(lines 158 164) no Hoare annotation was computed. [2023-12-18 21:56:26,958 INFO L899 garLoopResultBuilder]: For program point L158-2(lines 157 218) no Hoare annotation was computed. [2023-12-18 21:56:26,958 INFO L899 garLoopResultBuilder]: For program point L216(lines 157 218) no Hoare annotation was computed. [2023-12-18 21:56:26,958 INFO L895 garLoopResultBuilder]: At program point L241(line 241) the Hoare annotation is: (or (= |ULTIMATE.start_main_~zero~0#1| 0) (and (<= (mod |ULTIMATE.start_main_~zero~0#1| 4294967296) 0) (= |ULTIMATE.start_main_~a~0#1| 0))) [2023-12-18 21:56:26,958 INFO L899 garLoopResultBuilder]: For program point L241-1(line 241) no Hoare annotation was computed. [2023-12-18 21:56:26,958 INFO L899 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2023-12-18 21:56:26,958 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2023-12-18 21:56:26,958 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 20) no Hoare annotation was computed. [2023-12-18 21:56:26,958 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 20) no Hoare annotation was computed. [2023-12-18 21:56:26,958 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 15 20) the Hoare annotation is: true [2023-12-18 21:56:26,958 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-12-18 21:56:26,961 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:26,962 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 21:56:26,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 09:56:26 BoogieIcfgContainer [2023-12-18 21:56:26,974 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 21:56:26,975 INFO L158 Benchmark]: Toolchain (without parser) took 8999.62ms. Allocated memory was 225.4MB in the beginning and 351.3MB in the end (delta: 125.8MB). Free memory was 183.9MB in the beginning and 155.6MB in the end (delta: 28.3MB). Peak memory consumption was 155.2MB. Max. memory is 8.0GB. [2023-12-18 21:56:26,975 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 225.4MB. Free memory was 173.7MB in the beginning and 173.6MB in the end (delta: 98.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 21:56:26,976 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.59ms. Allocated memory is still 225.4MB. Free memory was 183.9MB in the beginning and 170.0MB in the end (delta: 13.9MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 21:56:26,976 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.15ms. Allocated memory is still 225.4MB. Free memory was 170.0MB in the beginning and 168.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:56:26,976 INFO L158 Benchmark]: Boogie Preprocessor took 26.01ms. Allocated memory is still 225.4MB. Free memory was 167.9MB in the beginning and 165.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:56:26,976 INFO L158 Benchmark]: RCFGBuilder took 374.79ms. Allocated memory is still 225.4MB. Free memory was 165.8MB in the beginning and 146.3MB in the end (delta: 19.5MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-18 21:56:26,977 INFO L158 Benchmark]: TraceAbstraction took 8371.44ms. Allocated memory was 225.4MB in the beginning and 351.3MB in the end (delta: 125.8MB). Free memory was 145.6MB in the beginning and 155.6MB in the end (delta: -10.0MB). Peak memory consumption was 117.4MB. Max. memory is 8.0GB. [2023-12-18 21:56:26,980 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 225.4MB. Free memory was 173.7MB in the beginning and 173.6MB in the end (delta: 98.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 200.59ms. Allocated memory is still 225.4MB. Free memory was 183.9MB in the beginning and 170.0MB in the end (delta: 13.9MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.15ms. Allocated memory is still 225.4MB. Free memory was 170.0MB in the beginning and 168.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.01ms. Allocated memory is still 225.4MB. Free memory was 167.9MB in the beginning and 165.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 374.79ms. Allocated memory is still 225.4MB. Free memory was 165.8MB in the beginning and 146.3MB in the end (delta: 19.5MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 8371.44ms. Allocated memory was 225.4MB in the beginning and 351.3MB in the end (delta: 125.8MB). Free memory was 145.6MB in the beginning and 155.6MB in the end (delta: -10.0MB). Peak memory consumption was 117.4MB. 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 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 15, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1128 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1125 mSDsluCounter, 6278 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5168 mSDsCounter, 69 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1733 IncrementalHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 69 mSolverCounterUnsat, 1110 mSDtfsCounter, 1733 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1179 GetRequests, 988 SyntacticMatches, 6 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=7, InterpolantAutomatonStates: 139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 207 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 128 PreInvPairs, 187 NumberOfFragments, 88 HoareAnnotationTreeSize, 128 FormulaSimplifications, 1393 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FormulaSimplificationsInter, 1270 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 1383 NumberOfCodeBlocks, 1352 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1667 ConstructedInterpolants, 0 QuantifiedInterpolants, 2988 SizeOfPredicates, 42 NumberOfNonLiveVariables, 1899 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 733/875 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((((m <= (16777215 + ((m / 4294967296) * 4294967296))) && (m <= 33554430)) && (0 <= m)) || ((((m == \old(m)) && (m <= (16777215 + ((m / 4294967296) * 4294967296)))) && (\old(e) <= e)) && ((e == \old(e)) || (e == 0)))) && (0 < (\old(m) % 4294967296))) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((\old(e) <= e) && (0 < (\old(m) % 4294967296))) && !((\old(m) == 1))) RESULT: Ultimate proved your program to be correct! [2023-12-18 21:56:27,009 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 Received shutdown request...