/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_1-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 21:56:09,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 21:56:09,853 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 21:56:09,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 21:56:09,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 21:56:09,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 21:56:09,878 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 21:56:09,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 21:56:09,879 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 21:56:09,881 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 21:56:09,882 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 21:56:09,882 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 21:56:09,882 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 21:56:09,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 21:56:09,883 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 21:56:09,883 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 21:56:09,883 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 21:56:09,884 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 21:56:09,884 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 21:56:09,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 21:56:09,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 21:56:09,884 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 21:56:09,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 21:56:09,885 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 21:56:09,885 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 21:56:09,885 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 21:56:09,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 21:56:09,885 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 21:56:09,886 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 21:56:09,886 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 21:56:09,886 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 21:56:09,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 21:56:09,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:56:09,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 21:56:09,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 21:56:09,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 21:56:09,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 21:56:09,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 21:56:09,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 21:56:09,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 21:56:09,888 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 21:56:09,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 21:56:09,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 21:56:09,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 21:56:10,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 21:56:10,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 21:56:10,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 21:56:10,096 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 21:56:10,096 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 21:56:10,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c [2023-12-18 21:56:11,068 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 21:56:11,193 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 21:56:11,193 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_1-3a.c.cil.c [2023-12-18 21:56:11,200 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e968f5613/770d75e9f412417f89d153c960c9c854/FLAGba9c756ad [2023-12-18 21:56:11,209 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e968f5613/770d75e9f412417f89d153c960c9c854 [2023-12-18 21:56:11,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 21:56:11,212 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 21:56:11,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 21:56:11,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 21:56:11,226 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 21:56:11,227 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,228 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295f9d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11, skipping insertion in model container [2023-12-18 21:56:11,228 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,246 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 21:56:11,344 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_1-3a.c.cil.c[730,743] [2023-12-18 21:56:11,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:56:11,390 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 21:56:11,397 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_1-3a.c.cil.c[730,743] [2023-12-18 21:56:11,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:56:11,433 INFO L206 MainTranslator]: Completed translation [2023-12-18 21:56:11,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11 WrapperNode [2023-12-18 21:56:11,434 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 21:56:11,435 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 21:56:11,435 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 21:56:11,435 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 21:56:11,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,445 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,461 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 186 [2023-12-18 21:56:11,461 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 21:56:11,461 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 21:56:11,462 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 21:56:11,462 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 21:56:11,468 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,470 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,478 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 21:56:11,478 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,478 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,481 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,484 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,485 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,488 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 21:56:11,488 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 21:56:11,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 21:56:11,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 21:56:11,489 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (1/1) ... [2023-12-18 21:56:11,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:56:11,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:11,509 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 21:56:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 21:56:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 21:56:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-18 21:56:11,514 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 21:56:11,544 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-18 21:56:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 21:56:11,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 21:56:11,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-18 21:56:11,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-18 21:56:11,619 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 21:56:11,621 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 21:56:11,895 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 21:56:11,913 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 21:56:11,913 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-18 21:56:11,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:56:11 BoogieIcfgContainer [2023-12-18 21:56:11,914 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 21:56:11,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 21:56:11,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 21:56:11,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 21:56:11,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:56:11" (1/3) ... [2023-12-18 21:56:11,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6715b7ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:56:11, skipping insertion in model container [2023-12-18 21:56:11,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:56:11" (2/3) ... [2023-12-18 21:56:11,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6715b7ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:56:11, skipping insertion in model container [2023-12-18 21:56:11,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:56:11" (3/3) ... [2023-12-18 21:56:11,919 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2023-12-18 21:56:11,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 21:56:11,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 21:56:11,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 21:56:11,964 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;@6f538e70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 21:56:11,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 21:56:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 71 states have (on average 1.676056338028169) internal successors, (119), 74 states have internal predecessors, (119), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-18 21:56:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-18 21:56:11,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:11,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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 21:56:11,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:11,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1355329015, now seen corresponding path program 1 times [2023-12-18 21:56:11,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:11,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198622856] [2023-12-18 21:56:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:11,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:12,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:12,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:12,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:12,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198622856] [2023-12-18 21:56:12,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198622856] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:12,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:12,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 21:56:12,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790272244] [2023-12-18 21:56:12,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:12,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:56:12,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:12,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:56:12,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:12,258 INFO L87 Difference]: Start difference. First operand has 84 states, 71 states have (on average 1.676056338028169) internal successors, (119), 74 states have internal predecessors, (119), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:12,311 INFO L93 Difference]: Finished difference Result 207 states and 354 transitions. [2023-12-18 21:56:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:56:12,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-12-18 21:56:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:12,318 INFO L225 Difference]: With dead ends: 207 [2023-12-18 21:56:12,319 INFO L226 Difference]: Without dead ends: 122 [2023-12-18 21:56:12,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 21:56:12,325 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 52 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:12,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 245 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-18 21:56:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2023-12-18 21:56:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 97 states have (on average 1.556701030927835) internal successors, (151), 99 states have internal predecessors, (151), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-18 21:56:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 174 transitions. [2023-12-18 21:56:12,354 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 174 transitions. Word has length 32 [2023-12-18 21:56:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:12,355 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 174 transitions. [2023-12-18 21:56:12,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 174 transitions. [2023-12-18 21:56:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-18 21:56:12,357 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:12,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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 21:56:12,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 21:56:12,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:12,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:12,358 INFO L85 PathProgramCache]: Analyzing trace with hash 668134762, now seen corresponding path program 1 times [2023-12-18 21:56:12,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:12,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942671583] [2023-12-18 21:56:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:12,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:12,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:12,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:12,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:12,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:12,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942671583] [2023-12-18 21:56:12,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942671583] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:12,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871101566] [2023-12-18 21:56:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:12,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:12,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:12,666 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 21:56:12,672 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 21:56:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:12,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:56:12,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 21:56:12,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871101566] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:12,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:12,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 16 [2023-12-18 21:56:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793817365] [2023-12-18 21:56:12,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:12,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-18 21:56:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-18 21:56:12,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:56:12,942 INFO L87 Difference]: Start difference. First operand 112 states and 174 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-18 21:56:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:13,295 INFO L93 Difference]: Finished difference Result 295 states and 465 transitions. [2023-12-18 21:56:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 21:56:13,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2023-12-18 21:56:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:13,301 INFO L225 Difference]: With dead ends: 295 [2023-12-18 21:56:13,302 INFO L226 Difference]: Without dead ends: 185 [2023-12-18 21:56:13,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:56:13,306 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 81 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:13,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1127 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:56:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-18 21:56:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 153. [2023-12-18 21:56:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.5037593984962405) internal successors, (200), 136 states have internal predecessors, (200), 15 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-18 21:56:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 235 transitions. [2023-12-18 21:56:13,336 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 235 transitions. Word has length 32 [2023-12-18 21:56:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:13,337 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 235 transitions. [2023-12-18 21:56:13,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-18 21:56:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 235 transitions. [2023-12-18 21:56:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 21:56:13,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:13,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:13,342 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 21:56:13,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:13,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:13,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash -350446498, now seen corresponding path program 1 times [2023-12-18 21:56:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260314297] [2023-12-18 21:56:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:13,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:13,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:13,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:13,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260314297] [2023-12-18 21:56:13,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260314297] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:13,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:13,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 21:56:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743858421] [2023-12-18 21:56:13,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:13,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:56:13,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:56:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:13,593 INFO L87 Difference]: Start difference. First operand 153 states and 235 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:13,608 INFO L93 Difference]: Finished difference Result 269 states and 413 transitions. [2023-12-18 21:56:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:56:13,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-12-18 21:56:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:13,610 INFO L225 Difference]: With dead ends: 269 [2023-12-18 21:56:13,610 INFO L226 Difference]: Without dead ends: 218 [2023-12-18 21:56:13,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 21:56:13,613 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 47 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:13,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 242 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-18 21:56:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2023-12-18 21:56:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 186 states have internal predecessors, (270), 21 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (25), 20 states have call predecessors, (25), 19 states have call successors, (25) [2023-12-18 21:56:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 316 transitions. [2023-12-18 21:56:13,634 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 316 transitions. Word has length 36 [2023-12-18 21:56:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:13,634 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 316 transitions. [2023-12-18 21:56:13,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 316 transitions. [2023-12-18 21:56:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 21:56:13,662 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:13,662 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:13,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 21:56:13,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:13,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:13,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1366774555, now seen corresponding path program 1 times [2023-12-18 21:56:13,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:13,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504572150] [2023-12-18 21:56:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:13,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:13,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:13,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:13,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:13,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:13,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504572150] [2023-12-18 21:56:13,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504572150] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:13,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117171470] [2023-12-18 21:56:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:13,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:13,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:13,772 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 21:56:13,783 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 21:56:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:13,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 21:56:13,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 21:56:13,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:14,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117171470] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:14,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:14,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 9] total 20 [2023-12-18 21:56:14,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920774954] [2023-12-18 21:56:14,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:14,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:56:14,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:56:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:56:14,082 INFO L87 Difference]: Start difference. First operand 208 states and 316 transitions. Second operand has 20 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-18 21:56:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:14,617 INFO L93 Difference]: Finished difference Result 370 states and 580 transitions. [2023-12-18 21:56:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-18 21:56:14,617 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2023-12-18 21:56:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:14,619 INFO L225 Difference]: With dead ends: 370 [2023-12-18 21:56:14,619 INFO L226 Difference]: Without dead ends: 218 [2023-12-18 21:56:14,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2023-12-18 21:56:14,621 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 229 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:14,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 2531 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:56:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-18 21:56:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 164. [2023-12-18 21:56:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 140 states have (on average 1.4714285714285715) internal successors, (206), 144 states have internal predecessors, (206), 18 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (29), 19 states have call predecessors, (29), 17 states have call successors, (29) [2023-12-18 21:56:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 253 transitions. [2023-12-18 21:56:14,634 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 253 transitions. Word has length 36 [2023-12-18 21:56:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:14,634 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 253 transitions. [2023-12-18 21:56:14,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-18 21:56:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 253 transitions. [2023-12-18 21:56:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 21:56:14,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:14,636 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:14,642 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 21:56:14,841 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 21:56:14,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:14,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash -903667333, now seen corresponding path program 1 times [2023-12-18 21:56:14,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:14,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869617862] [2023-12-18 21:56:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:14,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:14,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:14,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:14,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869617862] [2023-12-18 21:56:14,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869617862] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:14,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:14,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:56:14,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258262619] [2023-12-18 21:56:14,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:14,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:14,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:56:14,881 INFO L87 Difference]: Start difference. First operand 164 states and 253 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:14,897 INFO L93 Difference]: Finished difference Result 199 states and 305 transitions. [2023-12-18 21:56:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 21:56:14,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2023-12-18 21:56:14,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:14,899 INFO L225 Difference]: With dead ends: 199 [2023-12-18 21:56:14,899 INFO L226 Difference]: Without dead ends: 173 [2023-12-18 21:56:14,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 21:56:14,900 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 42 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:14,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 382 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-12-18 21:56:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 154. [2023-12-18 21:56:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 132 states have (on average 1.4545454545454546) internal successors, (192), 135 states have internal predecessors, (192), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (27), 17 states have call predecessors, (27), 15 states have call successors, (27) [2023-12-18 21:56:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 235 transitions. [2023-12-18 21:56:14,905 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 235 transitions. Word has length 38 [2023-12-18 21:56:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:14,905 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 235 transitions. [2023-12-18 21:56:14,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 235 transitions. [2023-12-18 21:56:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 21:56:14,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:14,906 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:14,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-18 21:56:14,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:14,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:14,907 INFO L85 PathProgramCache]: Analyzing trace with hash -562479231, now seen corresponding path program 1 times [2023-12-18 21:56:14,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:14,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279780953] [2023-12-18 21:56:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:14,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:14,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:14,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:14,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:14,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:14,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279780953] [2023-12-18 21:56:14,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279780953] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:14,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:14,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:56:14,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180064976] [2023-12-18 21:56:14,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:56:14,956 INFO L87 Difference]: Start difference. First operand 154 states and 235 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:14,972 INFO L93 Difference]: Finished difference Result 168 states and 252 transitions. [2023-12-18 21:56:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:56:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-12-18 21:56:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:14,973 INFO L225 Difference]: With dead ends: 168 [2023-12-18 21:56:14,973 INFO L226 Difference]: Without dead ends: 161 [2023-12-18 21:56:14,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 21:56:14,974 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 17 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:14,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 369 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-18 21:56:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2023-12-18 21:56:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 134 states have (on average 1.4477611940298507) internal successors, (194), 137 states have internal predecessors, (194), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (27), 17 states have call predecessors, (27), 15 states have call successors, (27) [2023-12-18 21:56:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 237 transitions. [2023-12-18 21:56:14,980 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 237 transitions. Word has length 39 [2023-12-18 21:56:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:14,980 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 237 transitions. [2023-12-18 21:56:14,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 237 transitions. [2023-12-18 21:56:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 21:56:14,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:14,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:14,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-18 21:56:14,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:14,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1212528131, now seen corresponding path program 1 times [2023-12-18 21:56:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:14,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336751192] [2023-12-18 21:56:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:15,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336751192] [2023-12-18 21:56:15,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336751192] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:15,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:15,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 21:56:15,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501296984] [2023-12-18 21:56:15,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:15,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 21:56:15,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 21:56:15,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-18 21:56:15,025 INFO L87 Difference]: Start difference. First operand 156 states and 237 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:15,047 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2023-12-18 21:56:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 21:56:15,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-12-18 21:56:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:15,048 INFO L225 Difference]: With dead ends: 163 [2023-12-18 21:56:15,048 INFO L226 Difference]: Without dead ends: 156 [2023-12-18 21:56:15,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-18 21:56:15,049 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 5 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:15,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 477 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-18 21:56:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2023-12-18 21:56:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 132 states have (on average 1.4393939393939394) internal successors, (190), 135 states have internal predecessors, (190), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (27), 17 states have call predecessors, (27), 15 states have call successors, (27) [2023-12-18 21:56:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 233 transitions. [2023-12-18 21:56:15,055 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 233 transitions. Word has length 39 [2023-12-18 21:56:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:15,055 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 233 transitions. [2023-12-18 21:56:15,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 233 transitions. [2023-12-18 21:56:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 21:56:15,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:15,056 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:15,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-18 21:56:15,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:15,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash -910263096, now seen corresponding path program 1 times [2023-12-18 21:56:15,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:15,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21501976] [2023-12-18 21:56:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:15,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:15,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:15,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21501976] [2023-12-18 21:56:15,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21501976] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:15,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818911972] [2023-12-18 21:56:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:15,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:15,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:15,160 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 21:56:15,192 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 21:56:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:56:15,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:15,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:15,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818911972] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:15,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:56:15,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 11 [2023-12-18 21:56:15,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013966090] [2023-12-18 21:56:15,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:15,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 21:56:15,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:15,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 21:56:15,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:56:15,278 INFO L87 Difference]: Start difference. First operand 154 states and 233 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:15,339 INFO L93 Difference]: Finished difference Result 211 states and 316 transitions. [2023-12-18 21:56:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:56:15,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-12-18 21:56:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:15,341 INFO L225 Difference]: With dead ends: 211 [2023-12-18 21:56:15,341 INFO L226 Difference]: Without dead ends: 168 [2023-12-18 21:56:15,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:56:15,342 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 127 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:15,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 321 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-12-18 21:56:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2023-12-18 21:56:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 134 states have (on average 1.4328358208955223) internal successors, (192), 137 states have internal predecessors, (192), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (27), 17 states have call predecessors, (27), 15 states have call successors, (27) [2023-12-18 21:56:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 235 transitions. [2023-12-18 21:56:15,350 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 235 transitions. Word has length 40 [2023-12-18 21:56:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:15,350 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 235 transitions. [2023-12-18 21:56:15,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,350 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 235 transitions. [2023-12-18 21:56:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 21:56:15,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:15,351 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:15,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:15,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:15,558 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:15,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1597457349, now seen corresponding path program 1 times [2023-12-18 21:56:15,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:15,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454523614] [2023-12-18 21:56:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:15,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:15,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454523614] [2023-12-18 21:56:15,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454523614] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:15,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:15,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-18 21:56:15,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224196548] [2023-12-18 21:56:15,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:15,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 21:56:15,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 21:56:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:56:15,684 INFO L87 Difference]: Start difference. First operand 156 states and 235 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:15,746 INFO L93 Difference]: Finished difference Result 330 states and 492 transitions. [2023-12-18 21:56:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 21:56:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-12-18 21:56:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:15,749 INFO L225 Difference]: With dead ends: 330 [2023-12-18 21:56:15,750 INFO L226 Difference]: Without dead ends: 227 [2023-12-18 21:56:15,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 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 21:56:15,751 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 36 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:15,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 639 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-18 21:56:15,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2023-12-18 21:56:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 197 states have (on average 1.3705583756345177) internal successors, (270), 199 states have internal predecessors, (270), 20 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (31), 24 states have call predecessors, (31), 19 states have call successors, (31) [2023-12-18 21:56:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 321 transitions. [2023-12-18 21:56:15,760 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 321 transitions. Word has length 40 [2023-12-18 21:56:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:15,760 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 321 transitions. [2023-12-18 21:56:15,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 321 transitions. [2023-12-18 21:56:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 21:56:15,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:15,761 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:15,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-18 21:56:15,762 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:15,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:15,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1890096120, now seen corresponding path program 1 times [2023-12-18 21:56:15,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:15,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609556462] [2023-12-18 21:56:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:15,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:15,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609556462] [2023-12-18 21:56:15,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609556462] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:15,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:15,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:56:15,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947126061] [2023-12-18 21:56:15,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:15,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:15,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:15,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:15,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:56:15,804 INFO L87 Difference]: Start difference. First operand 223 states and 321 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:15,829 INFO L93 Difference]: Finished difference Result 363 states and 530 transitions. [2023-12-18 21:56:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 21:56:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-12-18 21:56:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:15,831 INFO L225 Difference]: With dead ends: 363 [2023-12-18 21:56:15,831 INFO L226 Difference]: Without dead ends: 299 [2023-12-18 21:56:15,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 21:56:15,831 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 112 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:15,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 388 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:15,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-12-18 21:56:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 265. [2023-12-18 21:56:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 237 states have (on average 1.3881856540084387) internal successors, (329), 237 states have internal predecessors, (329), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (33), 26 states have call predecessors, (33), 21 states have call successors, (33) [2023-12-18 21:56:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 384 transitions. [2023-12-18 21:56:15,841 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 384 transitions. Word has length 40 [2023-12-18 21:56:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:15,841 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 384 transitions. [2023-12-18 21:56:15,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 384 transitions. [2023-12-18 21:56:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 21:56:15,842 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:15,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-18 21:56:15,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:15,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash -282231250, now seen corresponding path program 1 times [2023-12-18 21:56:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:15,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413663459] [2023-12-18 21:56:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:15,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:15,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:15,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413663459] [2023-12-18 21:56:15,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413663459] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:15,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:15,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:56:15,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595103257] [2023-12-18 21:56:15,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:15,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:15,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:15,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:15,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:56:15,891 INFO L87 Difference]: Start difference. First operand 265 states and 384 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:15,907 INFO L93 Difference]: Finished difference Result 274 states and 392 transitions. [2023-12-18 21:56:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:56:15,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-12-18 21:56:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:15,910 INFO L225 Difference]: With dead ends: 274 [2023-12-18 21:56:15,910 INFO L226 Difference]: Without dead ends: 265 [2023-12-18 21:56:15,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 21:56:15,910 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:15,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 353 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-12-18 21:56:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2023-12-18 21:56:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 237 states have (on average 1.3839662447257384) internal successors, (328), 237 states have internal predecessors, (328), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (33), 26 states have call predecessors, (33), 21 states have call successors, (33) [2023-12-18 21:56:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 383 transitions. [2023-12-18 21:56:15,918 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 383 transitions. Word has length 43 [2023-12-18 21:56:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:15,919 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 383 transitions. [2023-12-18 21:56:15,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 383 transitions. [2023-12-18 21:56:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 21:56:15,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:15,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:15,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-18 21:56:15,920 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:15,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2057238612, now seen corresponding path program 1 times [2023-12-18 21:56:15,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:15,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237777378] [2023-12-18 21:56:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:15,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:16,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:16,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237777378] [2023-12-18 21:56:16,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237777378] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:16,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725626256] [2023-12-18 21:56:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:16,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:16,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:16,074 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 21:56:16,101 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 21:56:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-18 21:56:16,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:16,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:16,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725626256] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:16,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:16,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-12-18 21:56:16,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045494811] [2023-12-18 21:56:16,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:16,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 21:56:16,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:16,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 21:56:16,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:56:16,147 INFO L87 Difference]: Start difference. First operand 265 states and 383 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:16,221 INFO L93 Difference]: Finished difference Result 436 states and 642 transitions. [2023-12-18 21:56:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 21:56:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-12-18 21:56:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:16,223 INFO L225 Difference]: With dead ends: 436 [2023-12-18 21:56:16,223 INFO L226 Difference]: Without dead ends: 401 [2023-12-18 21:56:16,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:56:16,224 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 51 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:16,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 417 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-12-18 21:56:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 319. [2023-12-18 21:56:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 281 states have (on average 1.3843416370106763) internal successors, (389), 282 states have internal predecessors, (389), 32 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (43), 36 states have call predecessors, (43), 31 states have call successors, (43) [2023-12-18 21:56:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 464 transitions. [2023-12-18 21:56:16,240 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 464 transitions. Word has length 43 [2023-12-18 21:56:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:16,240 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 464 transitions. [2023-12-18 21:56:16,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 464 transitions. [2023-12-18 21:56:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 21:56:16,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:16,241 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:16,246 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 21:56:16,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:16,446 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:16,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:16,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1356174034, now seen corresponding path program 1 times [2023-12-18 21:56:16,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:16,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415939486] [2023-12-18 21:56:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:16,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:16,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:16,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415939486] [2023-12-18 21:56:16,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415939486] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:16,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:16,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:56:16,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752873615] [2023-12-18 21:56:16,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:16,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:56:16,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:56:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:56:16,487 INFO L87 Difference]: Start difference. First operand 319 states and 464 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:16,505 INFO L93 Difference]: Finished difference Result 332 states and 477 transitions. [2023-12-18 21:56:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:56:16,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-12-18 21:56:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:16,506 INFO L225 Difference]: With dead ends: 332 [2023-12-18 21:56:16,506 INFO L226 Difference]: Without dead ends: 272 [2023-12-18 21:56:16,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 21:56:16,508 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:16,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 350 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-12-18 21:56:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2023-12-18 21:56:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 234 states have (on average 1.4017094017094016) internal successors, (328), 238 states have internal predecessors, (328), 32 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (36), 32 states have call predecessors, (36), 30 states have call successors, (36) [2023-12-18 21:56:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 396 transitions. [2023-12-18 21:56:16,522 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 396 transitions. Word has length 43 [2023-12-18 21:56:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:16,522 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 396 transitions. [2023-12-18 21:56:16,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 396 transitions. [2023-12-18 21:56:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 21:56:16,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:16,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:16,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-18 21:56:16,523 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:16,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:16,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2133792044, now seen corresponding path program 2 times [2023-12-18 21:56:16,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:16,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755724335] [2023-12-18 21:56:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:16,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:16,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755724335] [2023-12-18 21:56:16,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755724335] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951177820] [2023-12-18 21:56:16,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:56:16,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:16,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:16,621 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 21:56:16,652 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 21:56:16,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-18 21:56:16,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:56:16,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-18 21:56:16,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:16,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:16,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951177820] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:16,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:16,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 12 [2023-12-18 21:56:16,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416508011] [2023-12-18 21:56:16,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:16,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 21:56:16,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 21:56:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:56:16,732 INFO L87 Difference]: Start difference. First operand 272 states and 396 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:16,879 INFO L93 Difference]: Finished difference Result 677 states and 1008 transitions. [2023-12-18 21:56:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 21:56:16,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-12-18 21:56:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:16,881 INFO L225 Difference]: With dead ends: 677 [2023-12-18 21:56:16,881 INFO L226 Difference]: Without dead ends: 541 [2023-12-18 21:56:16,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:56:16,882 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 151 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:16,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1035 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-12-18 21:56:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 497. [2023-12-18 21:56:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 434 states have (on average 1.3847926267281105) internal successors, (601), 437 states have internal predecessors, (601), 57 states have call successors, (57), 3 states have call predecessors, (57), 5 states have return successors, (61), 60 states have call predecessors, (61), 55 states have call successors, (61) [2023-12-18 21:56:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 719 transitions. [2023-12-18 21:56:16,898 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 719 transitions. Word has length 44 [2023-12-18 21:56:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:16,898 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 719 transitions. [2023-12-18 21:56:16,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 719 transitions. [2023-12-18 21:56:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 21:56:16,899 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:16,899 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:16,904 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 21:56:17,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 21:56:17,103 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:17,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:17,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1740765034, now seen corresponding path program 1 times [2023-12-18 21:56:17,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:17,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047319429] [2023-12-18 21:56:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:17,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:17,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:17,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:17,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:17,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:17,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047319429] [2023-12-18 21:56:17,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047319429] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:17,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618171303] [2023-12-18 21:56:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:17,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:17,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:17,221 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 21:56:17,236 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 21:56:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:17,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-18 21:56:17,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:17,404 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:17,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618171303] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:17,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:17,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 15 [2023-12-18 21:56:17,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466063554] [2023-12-18 21:56:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:17,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 21:56:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:17,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 21:56:17,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:56:17,405 INFO L87 Difference]: Start difference. First operand 497 states and 719 transitions. Second operand has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 21:56:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:17,692 INFO L93 Difference]: Finished difference Result 578 states and 827 transitions. [2023-12-18 21:56:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 21:56:17,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2023-12-18 21:56:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:17,694 INFO L225 Difference]: With dead ends: 578 [2023-12-18 21:56:17,694 INFO L226 Difference]: Without dead ends: 507 [2023-12-18 21:56:17,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:56:17,696 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 199 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:17,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1868 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:56:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-12-18 21:56:17,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 475. [2023-12-18 21:56:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 415 states have (on average 1.383132530120482) internal successors, (574), 418 states have internal predecessors, (574), 53 states have call successors, (53), 4 states have call predecessors, (53), 6 states have return successors, (57), 56 states have call predecessors, (57), 51 states have call successors, (57) [2023-12-18 21:56:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 684 transitions. [2023-12-18 21:56:17,711 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 684 transitions. Word has length 44 [2023-12-18 21:56:17,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:17,712 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 684 transitions. [2023-12-18 21:56:17,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 21:56:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 684 transitions. [2023-12-18 21:56:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-18 21:56:17,712 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:17,712 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2023-12-18 21:56:17,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:17,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 21:56:17,918 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:17,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash 810209377, now seen corresponding path program 1 times [2023-12-18 21:56:17,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:17,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828064563] [2023-12-18 21:56:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:17,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 21:56:18,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:18,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828064563] [2023-12-18 21:56:18,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828064563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:18,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610047376] [2023-12-18 21:56:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:18,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:18,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:18,180 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 21:56:18,183 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 21:56:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-18 21:56:18,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:18,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:18,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610047376] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:18,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:18,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 22 [2023-12-18 21:56:18,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095084681] [2023-12-18 21:56:18,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:18,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-18 21:56:18,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:18,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-18 21:56:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-12-18 21:56:18,327 INFO L87 Difference]: Start difference. First operand 475 states and 684 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:18,476 INFO L93 Difference]: Finished difference Result 567 states and 816 transitions. [2023-12-18 21:56:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 21:56:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-12-18 21:56:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:18,478 INFO L225 Difference]: With dead ends: 567 [2023-12-18 21:56:18,478 INFO L226 Difference]: Without dead ends: 508 [2023-12-18 21:56:18,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:56:18,478 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 169 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:18,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 927 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-12-18 21:56:18,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 463. [2023-12-18 21:56:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 404 states have (on average 1.3787128712871286) internal successors, (557), 408 states have internal predecessors, (557), 52 states have call successors, (52), 4 states have call predecessors, (52), 6 states have return successors, (55), 54 states have call predecessors, (55), 50 states have call successors, (55) [2023-12-18 21:56:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 664 transitions. [2023-12-18 21:56:18,494 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 664 transitions. Word has length 45 [2023-12-18 21:56:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:18,494 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 664 transitions. [2023-12-18 21:56:18,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 664 transitions. [2023-12-18 21:56:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 21:56:18,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:18,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:18,500 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 21:56:18,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:18,700 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:18,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:18,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1326802919, now seen corresponding path program 1 times [2023-12-18 21:56:18,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:18,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107130989] [2023-12-18 21:56:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:18,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-18 21:56:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:56:18,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:18,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107130989] [2023-12-18 21:56:18,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107130989] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:18,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243690580] [2023-12-18 21:56:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:18,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:18,740 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 21:56:18,742 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 21:56:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:18,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 21:56:18,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 21:56:18,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:18,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243690580] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:18,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:18,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-12-18 21:56:18,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192309680] [2023-12-18 21:56:18,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:18,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:56:18,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:56:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:56:18,787 INFO L87 Difference]: Start difference. First operand 463 states and 664 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 21:56:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:18,819 INFO L93 Difference]: Finished difference Result 839 states and 1208 transitions. [2023-12-18 21:56:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:56:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-12-18 21:56:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:18,821 INFO L225 Difference]: With dead ends: 839 [2023-12-18 21:56:18,821 INFO L226 Difference]: Without dead ends: 468 [2023-12-18 21:56:18,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:56:18,822 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 211 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 21:56:18,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 211 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-12-18 21:56:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 466. [2023-12-18 21:56:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 407 states have (on average 1.3783783783783783) internal successors, (561), 411 states have internal predecessors, (561), 52 states have call successors, (52), 4 states have call predecessors, (52), 6 states have return successors, (55), 54 states have call predecessors, (55), 50 states have call successors, (55) [2023-12-18 21:56:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 668 transitions. [2023-12-18 21:56:18,835 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 668 transitions. Word has length 47 [2023-12-18 21:56:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:18,835 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 668 transitions. [2023-12-18 21:56:18,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 21:56:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 668 transitions. [2023-12-18 21:56:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 21:56:18,836 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:18,836 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:18,843 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 21:56:19,040 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,SelfDestructingSolverStorable16 [2023-12-18 21:56:19,041 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:19,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:19,041 INFO L85 PathProgramCache]: Analyzing trace with hash 298929759, now seen corresponding path program 1 times [2023-12-18 21:56:19,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:19,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494637682] [2023-12-18 21:56:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:19,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 21:56:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:19,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:19,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494637682] [2023-12-18 21:56:19,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494637682] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:19,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538757749] [2023-12-18 21:56:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:19,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:19,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:19,067 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 21:56:19,071 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 21:56:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 21:56:19,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 21:56:19,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538757749] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:19,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:19,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2023-12-18 21:56:19,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241062778] [2023-12-18 21:56:19,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:19,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 21:56:19,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 21:56:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 21:56:19,134 INFO L87 Difference]: Start difference. First operand 466 states and 668 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 21:56:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:19,164 INFO L93 Difference]: Finished difference Result 843 states and 1212 transitions. [2023-12-18 21:56:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 21:56:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2023-12-18 21:56:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:19,166 INFO L225 Difference]: With dead ends: 843 [2023-12-18 21:56:19,166 INFO L226 Difference]: Without dead ends: 469 [2023-12-18 21:56:19,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 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 21:56:19,167 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:19,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 210 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-12-18 21:56:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 468. [2023-12-18 21:56:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 409 states have (on average 1.3765281173594133) internal successors, (563), 413 states have internal predecessors, (563), 52 states have call successors, (52), 4 states have call predecessors, (52), 6 states have return successors, (55), 54 states have call predecessors, (55), 50 states have call successors, (55) [2023-12-18 21:56:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 670 transitions. [2023-12-18 21:56:19,181 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 670 transitions. Word has length 48 [2023-12-18 21:56:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:19,181 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 670 transitions. [2023-12-18 21:56:19,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 21:56:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 670 transitions. [2023-12-18 21:56:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-18 21:56:19,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:19,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:19,189 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 21:56:19,385 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,SelfDestructingSolverStorable17 [2023-12-18 21:56:19,385 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:19,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:19,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1945053539, now seen corresponding path program 1 times [2023-12-18 21:56:19,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:19,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714075182] [2023-12-18 21:56:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:19,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 21:56:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:19,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:19,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714075182] [2023-12-18 21:56:19,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714075182] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:19,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:19,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-18 21:56:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694014827] [2023-12-18 21:56:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:19,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 21:56:19,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:19,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 21:56:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:56:19,542 INFO L87 Difference]: Start difference. First operand 468 states and 670 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:19,616 INFO L93 Difference]: Finished difference Result 475 states and 676 transitions. [2023-12-18 21:56:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:56:19,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-12-18 21:56:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:19,618 INFO L225 Difference]: With dead ends: 475 [2023-12-18 21:56:19,618 INFO L226 Difference]: Without dead ends: 473 [2023-12-18 21:56:19,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:56:19,619 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 83 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:19,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 550 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-12-18 21:56:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 472. [2023-12-18 21:56:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 412 states have (on average 1.3737864077669903) internal successors, (566), 416 states have internal predecessors, (566), 52 states have call successors, (52), 5 states have call predecessors, (52), 7 states have return successors, (55), 54 states have call predecessors, (55), 50 states have call successors, (55) [2023-12-18 21:56:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 673 transitions. [2023-12-18 21:56:19,636 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 673 transitions. Word has length 48 [2023-12-18 21:56:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:19,636 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 673 transitions. [2023-12-18 21:56:19,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 673 transitions. [2023-12-18 21:56:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 21:56:19,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:19,637 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:19,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-18 21:56:19,637 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:19,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2016719310, now seen corresponding path program 1 times [2023-12-18 21:56:19,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:19,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664539266] [2023-12-18 21:56:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:19,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:19,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:19,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664539266] [2023-12-18 21:56:19,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664539266] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:19,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:19,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-18 21:56:19,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404607787] [2023-12-18 21:56:19,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:19,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 21:56:19,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:19,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 21:56:19,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:56:19,756 INFO L87 Difference]: Start difference. First operand 472 states and 673 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:19,945 INFO L93 Difference]: Finished difference Result 641 states and 927 transitions. [2023-12-18 21:56:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 21:56:19,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2023-12-18 21:56:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:19,947 INFO L225 Difference]: With dead ends: 641 [2023-12-18 21:56:19,948 INFO L226 Difference]: Without dead ends: 619 [2023-12-18 21:56:19,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-18 21:56:19,948 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 94 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:19,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 721 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:56:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-12-18 21:56:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 515. [2023-12-18 21:56:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 449 states have (on average 1.3808463251670378) internal successors, (620), 454 states have internal predecessors, (620), 58 states have call successors, (58), 5 states have call predecessors, (58), 7 states have return successors, (61), 60 states have call predecessors, (61), 56 states have call successors, (61) [2023-12-18 21:56:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 739 transitions. [2023-12-18 21:56:19,970 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 739 transitions. Word has length 49 [2023-12-18 21:56:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:19,970 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 739 transitions. [2023-12-18 21:56:19,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 739 transitions. [2023-12-18 21:56:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 21:56:19,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:19,971 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:19,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-18 21:56:19,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:19,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash 529748819, now seen corresponding path program 1 times [2023-12-18 21:56:19,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:19,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195461429] [2023-12-18 21:56:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:19,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-12-18 21:56:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:20,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:20,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195461429] [2023-12-18 21:56:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195461429] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:20,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571616421] [2023-12-18 21:56:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:20,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:20,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:20,068 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 21:56:20,095 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 21:56:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-18 21:56:20,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 21:56:20,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:20,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571616421] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:20,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:20,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 12 [2023-12-18 21:56:20,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480930411] [2023-12-18 21:56:20,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:20,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-18 21:56:20,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:20,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-18 21:56:20,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:56:20,189 INFO L87 Difference]: Start difference. First operand 515 states and 739 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-18 21:56:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:20,399 INFO L93 Difference]: Finished difference Result 640 states and 902 transitions. [2023-12-18 21:56:20,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:56:20,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 50 [2023-12-18 21:56:20,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:20,401 INFO L225 Difference]: With dead ends: 640 [2023-12-18 21:56:20,401 INFO L226 Difference]: Without dead ends: 552 [2023-12-18 21:56:20,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:56:20,402 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 192 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:20,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1230 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-12-18 21:56:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 515. [2023-12-18 21:56:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 449 states have (on average 1.376391982182628) internal successors, (618), 454 states have internal predecessors, (618), 58 states have call successors, (58), 5 states have call predecessors, (58), 7 states have return successors, (61), 60 states have call predecessors, (61), 56 states have call successors, (61) [2023-12-18 21:56:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 737 transitions. [2023-12-18 21:56:20,425 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 737 transitions. Word has length 50 [2023-12-18 21:56:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:20,425 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 737 transitions. [2023-12-18 21:56:20,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-18 21:56:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 737 transitions. [2023-12-18 21:56:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 21:56:20,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:20,426 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-18 21:56:20,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:20,630 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,SelfDestructingSolverStorable20 [2023-12-18 21:56:20,631 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:20,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1071868914, now seen corresponding path program 1 times [2023-12-18 21:56:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:20,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413129235] [2023-12-18 21:56:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:20,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:56:20,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413129235] [2023-12-18 21:56:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413129235] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:20,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:20,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-18 21:56:20,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233510800] [2023-12-18 21:56:20,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:20,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 21:56:20,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 21:56:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-18 21:56:20,689 INFO L87 Difference]: Start difference. First operand 515 states and 737 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:20,740 INFO L93 Difference]: Finished difference Result 586 states and 834 transitions. [2023-12-18 21:56:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 21:56:20,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-12-18 21:56:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:20,743 INFO L225 Difference]: With dead ends: 586 [2023-12-18 21:56:20,743 INFO L226 Difference]: Without dead ends: 584 [2023-12-18 21:56:20,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 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 21:56:20,743 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 41 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:20,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 621 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:56:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-12-18 21:56:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 529. [2023-12-18 21:56:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 456 states have (on average 1.3706140350877194) internal successors, (625), 467 states have internal predecessors, (625), 64 states have call successors, (64), 6 states have call predecessors, (64), 8 states have return successors, (67), 60 states have call predecessors, (67), 62 states have call successors, (67) [2023-12-18 21:56:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 756 transitions. [2023-12-18 21:56:20,767 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 756 transitions. Word has length 50 [2023-12-18 21:56:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:20,768 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 756 transitions. [2023-12-18 21:56:20,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 756 transitions. [2023-12-18 21:56:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-18 21:56:20,768 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:20,769 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:20,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-18 21:56:20,769 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:20,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:20,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1027708281, now seen corresponding path program 1 times [2023-12-18 21:56:20,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:20,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983680671] [2023-12-18 21:56:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:20,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-18 21:56:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:20,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:20,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983680671] [2023-12-18 21:56:20,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983680671] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:20,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:20,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-18 21:56:20,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487187046] [2023-12-18 21:56:20,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:20,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 21:56:20,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:20,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 21:56:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-18 21:56:20,889 INFO L87 Difference]: Start difference. First operand 529 states and 756 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:21,027 INFO L93 Difference]: Finished difference Result 716 states and 1021 transitions. [2023-12-18 21:56:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:56:21,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-12-18 21:56:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:21,029 INFO L225 Difference]: With dead ends: 716 [2023-12-18 21:56:21,029 INFO L226 Difference]: Without dead ends: 565 [2023-12-18 21:56:21,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:56:21,030 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 99 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:21,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 856 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-12-18 21:56:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 532. [2023-12-18 21:56:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 459 states have (on average 1.3616557734204793) internal successors, (625), 470 states have internal predecessors, (625), 64 states have call successors, (64), 6 states have call predecessors, (64), 8 states have return successors, (67), 60 states have call predecessors, (67), 62 states have call successors, (67) [2023-12-18 21:56:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 756 transitions. [2023-12-18 21:56:21,055 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 756 transitions. Word has length 51 [2023-12-18 21:56:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:21,056 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 756 transitions. [2023-12-18 21:56:21,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-18 21:56:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 756 transitions. [2023-12-18 21:56:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-18 21:56:21,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:21,057 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:21,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-18 21:56:21,057 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:21,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1297011064, now seen corresponding path program 1 times [2023-12-18 21:56:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:21,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683243061] [2023-12-18 21:56:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:21,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:21,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:21,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683243061] [2023-12-18 21:56:21,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683243061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:21,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:21,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-18 21:56:21,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321968469] [2023-12-18 21:56:21,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:21,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 21:56:21,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:21,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 21:56:21,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:56:21,189 INFO L87 Difference]: Start difference. First operand 532 states and 756 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:21,370 INFO L93 Difference]: Finished difference Result 679 states and 954 transitions. [2023-12-18 21:56:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 21:56:21,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2023-12-18 21:56:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:21,372 INFO L225 Difference]: With dead ends: 679 [2023-12-18 21:56:21,372 INFO L226 Difference]: Without dead ends: 609 [2023-12-18 21:56:21,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:56:21,374 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 119 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:21,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 781 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-12-18 21:56:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 505. [2023-12-18 21:56:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.3530751708428246) internal successors, (594), 448 states have internal predecessors, (594), 57 states have call successors, (57), 6 states have call predecessors, (57), 8 states have return successors, (60), 54 states have call predecessors, (60), 55 states have call successors, (60) [2023-12-18 21:56:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 711 transitions. [2023-12-18 21:56:21,403 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 711 transitions. Word has length 51 [2023-12-18 21:56:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:21,403 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 711 transitions. [2023-12-18 21:56:21,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 711 transitions. [2023-12-18 21:56:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-18 21:56:21,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:21,404 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:56:21,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-18 21:56:21,404 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:21,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2114659514, now seen corresponding path program 1 times [2023-12-18 21:56:21,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:21,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889142516] [2023-12-18 21:56:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:21,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-18 21:56:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 21:56:21,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:21,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889142516] [2023-12-18 21:56:21,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889142516] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:21,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936693720] [2023-12-18 21:56:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:21,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:21,950 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 21:56:21,977 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 21:56:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:21,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-18 21:56:21,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:22,063 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:56:22,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936693720] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:22,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 21:56:22,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [20] total 24 [2023-12-18 21:56:22,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365853273] [2023-12-18 21:56:22,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:22,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 21:56:22,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 21:56:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2023-12-18 21:56:22,064 INFO L87 Difference]: Start difference. First operand 505 states and 711 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:22,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:22,190 INFO L93 Difference]: Finished difference Result 622 states and 883 transitions. [2023-12-18 21:56:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:56:22,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2023-12-18 21:56:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:22,193 INFO L225 Difference]: With dead ends: 622 [2023-12-18 21:56:22,193 INFO L226 Difference]: Without dead ends: 565 [2023-12-18 21:56:22,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:56:22,193 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 74 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 617 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-12-18 21:56:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 451. [2023-12-18 21:56:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 391 states have (on average 1.3529411764705883) internal successors, (529), 400 states have internal predecessors, (529), 52 states have call successors, (52), 6 states have call predecessors, (52), 7 states have return successors, (53), 48 states have call predecessors, (53), 50 states have call successors, (53) [2023-12-18 21:56:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 634 transitions. [2023-12-18 21:56:22,230 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 634 transitions. Word has length 51 [2023-12-18 21:56:22,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:22,230 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 634 transitions. [2023-12-18 21:56:22,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 21:56:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 634 transitions. [2023-12-18 21:56:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-18 21:56:22,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:22,231 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:22,246 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 21:56:22,446 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,SelfDestructingSolverStorable24 [2023-12-18 21:56:22,447 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:22,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1936039597, now seen corresponding path program 1 times [2023-12-18 21:56:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:22,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265373202] [2023-12-18 21:56:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-18 21:56:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:56:22,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265373202] [2023-12-18 21:56:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265373202] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:56:22,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:56:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-12-18 21:56:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925301527] [2023-12-18 21:56:22,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:56:22,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 21:56:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 21:56:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:56:22,773 INFO L87 Difference]: Start difference. First operand 451 states and 634 transitions. Second operand has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-18 21:56:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:23,171 INFO L93 Difference]: Finished difference Result 581 states and 803 transitions. [2023-12-18 21:56:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 21:56:23,172 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 52 [2023-12-18 21:56:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:23,174 INFO L225 Difference]: With dead ends: 581 [2023-12-18 21:56:23,174 INFO L226 Difference]: Without dead ends: 508 [2023-12-18 21:56:23,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-12-18 21:56:23,174 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 271 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:23,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1575 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:56:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-12-18 21:56:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 463. [2023-12-18 21:56:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 400 states have (on average 1.345) internal successors, (538), 409 states have internal predecessors, (538), 54 states have call successors, (54), 7 states have call predecessors, (54), 8 states have return successors, (55), 50 states have call predecessors, (55), 52 states have call successors, (55) [2023-12-18 21:56:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 647 transitions. [2023-12-18 21:56:23,201 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 647 transitions. Word has length 52 [2023-12-18 21:56:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:23,201 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 647 transitions. [2023-12-18 21:56:23,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-18 21:56:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 647 transitions. [2023-12-18 21:56:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-18 21:56:23,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:23,202 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:23,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-18 21:56:23,202 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:23,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:23,202 INFO L85 PathProgramCache]: Analyzing trace with hash -645889208, now seen corresponding path program 1 times [2023-12-18 21:56:23,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:23,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474574772] [2023-12-18 21:56:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:23,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-12-18 21:56:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:23,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474574772] [2023-12-18 21:56:23,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474574772] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464458992] [2023-12-18 21:56:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:23,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:23,280 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:56:23,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 21:56:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-18 21:56:23,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 21:56:23,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:23,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464458992] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:23,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:23,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10] total 15 [2023-12-18 21:56:23,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490789539] [2023-12-18 21:56:23,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:23,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 21:56:23,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 21:56:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:56:23,464 INFO L87 Difference]: Start difference. First operand 463 states and 647 transitions. Second operand has 15 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-18 21:56:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:23,627 INFO L93 Difference]: Finished difference Result 571 states and 791 transitions. [2023-12-18 21:56:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:56:23,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2023-12-18 21:56:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:23,629 INFO L225 Difference]: With dead ends: 571 [2023-12-18 21:56:23,629 INFO L226 Difference]: Without dead ends: 477 [2023-12-18 21:56:23,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-12-18 21:56:23,631 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 117 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:23,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1486 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:56:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-12-18 21:56:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 446. [2023-12-18 21:56:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 385 states have (on average 1.3402597402597403) internal successors, (516), 394 states have internal predecessors, (516), 52 states have call successors, (52), 7 states have call predecessors, (52), 8 states have return successors, (53), 48 states have call predecessors, (53), 50 states have call successors, (53) [2023-12-18 21:56:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 621 transitions. [2023-12-18 21:56:23,658 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 621 transitions. Word has length 54 [2023-12-18 21:56:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:23,658 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 621 transitions. [2023-12-18 21:56:23,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-18 21:56:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 621 transitions. [2023-12-18 21:56:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-18 21:56:23,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:23,659 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:23,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 21:56:23,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-18 21:56:23,864 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:23,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1666957562, now seen corresponding path program 1 times [2023-12-18 21:56:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:23,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39343349] [2023-12-18 21:56:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:23,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 21:56:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 21:56:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 21:56:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-12-18 21:56:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:23,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:56:23,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39343349] [2023-12-18 21:56:23,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39343349] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:56:23,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271364453] [2023-12-18 21:56:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:23,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:56:23,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:56:23,969 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:56:23,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 21:56:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:56:24,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 21:56:24,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:56:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 21:56:24,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:56:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 21:56:24,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271364453] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:56:24,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:56:24,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-12-18 21:56:24,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139974541] [2023-12-18 21:56:24,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:56:24,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 21:56:24,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:56:24,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 21:56:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:56:24,105 INFO L87 Difference]: Start difference. First operand 446 states and 621 transitions. Second operand has 14 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-18 21:56:28,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-18 21:56:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:56:28,302 INFO L93 Difference]: Finished difference Result 607 states and 845 transitions. [2023-12-18 21:56:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:56:28,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2023-12-18 21:56:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:56:28,304 INFO L225 Difference]: With dead ends: 607 [2023-12-18 21:56:28,304 INFO L226 Difference]: Without dead ends: 520 [2023-12-18 21:56:28,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-12-18 21:56:28,305 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 91 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:56:28,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1573 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-12-18 21:56:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-12-18 21:56:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 446. [2023-12-18 21:56:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 385 states have (on average 1.335064935064935) internal successors, (514), 394 states have internal predecessors, (514), 52 states have call successors, (52), 7 states have call predecessors, (52), 8 states have return successors, (53), 48 states have call predecessors, (53), 50 states have call successors, (53) [2023-12-18 21:56:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 619 transitions. [2023-12-18 21:56:28,331 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 619 transitions. Word has length 54 [2023-12-18 21:56:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:56:28,331 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 619 transitions. [2023-12-18 21:56:28,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-18 21:56:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 619 transitions. [2023-12-18 21:56:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 21:56:28,331 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:56:28,332 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-18 21:56:28,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-18 21:56:28,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-18 21:56:28,536 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:56:28,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:56:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash 21946354, now seen corresponding path program 1 times [2023-12-18 21:56:28,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:56:28,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88806214] [2023-12-18 21:56:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:56:28,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:56:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-18 21:56:28,554 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-18 21:56:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-18 21:56:28,600 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-18 21:56:28,600 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-18 21:56:28,601 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 21:56:28,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-18 21:56:28,604 INFO L445 BasicCegarLoop]: Path program histogram: [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] [2023-12-18 21:56:28,606 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 21:56:28,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 09:56:28 BoogieIcfgContainer [2023-12-18 21:56:28,651 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 21:56:28,651 INFO L158 Benchmark]: Toolchain (without parser) took 17439.61ms. Allocated memory was 313.5MB in the beginning and 393.2MB in the end (delta: 79.7MB). Free memory was 259.0MB in the beginning and 232.9MB in the end (delta: 26.1MB). Peak memory consumption was 106.1MB. Max. memory is 8.0GB. [2023-12-18 21:56:28,651 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 218.1MB. Free memory was 167.4MB in the beginning and 167.3MB in the end (delta: 151.0kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 21:56:28,652 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.65ms. Allocated memory is still 313.5MB. Free memory was 258.7MB in the beginning and 244.4MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-18 21:56:28,652 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.23ms. Allocated memory is still 313.5MB. Free memory was 244.4MB in the beginning and 242.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:56:28,653 INFO L158 Benchmark]: Boogie Preprocessor took 26.28ms. Allocated memory is still 313.5MB. Free memory was 242.3MB in the beginning and 239.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:56:28,656 INFO L158 Benchmark]: RCFGBuilder took 425.47ms. Allocated memory is still 313.5MB. Free memory was 239.6MB in the beginning and 271.8MB in the end (delta: -32.2MB). Peak memory consumption was 20.1MB. Max. memory is 8.0GB. [2023-12-18 21:56:28,656 INFO L158 Benchmark]: TraceAbstraction took 16736.20ms. Allocated memory was 313.5MB in the beginning and 393.2MB in the end (delta: 79.7MB). Free memory was 271.3MB in the beginning and 232.9MB in the end (delta: 38.3MB). Peak memory consumption was 117.5MB. Max. memory is 8.0GB. [2023-12-18 21:56:28,659 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 218.1MB. Free memory was 167.4MB in the beginning and 167.3MB in the end (delta: 151.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 221.65ms. Allocated memory is still 313.5MB. Free memory was 258.7MB in the beginning and 244.4MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.23ms. Allocated memory is still 313.5MB. Free memory was 244.4MB in the beginning and 242.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.28ms. Allocated memory is still 313.5MB. Free memory was 242.3MB in the beginning and 239.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 425.47ms. Allocated memory is still 313.5MB. Free memory was 239.6MB in the beginning and 271.8MB in the end (delta: -32.2MB). Peak memory consumption was 20.1MB. Max. memory is 8.0GB. * TraceAbstraction took 16736.20ms. Allocated memory was 313.5MB in the beginning and 393.2MB in the end (delta: 79.7MB). Free memory was 271.3MB in the beginning and 232.9MB in the end (delta: 38.3MB). Peak memory consumption was 117.5MB. 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 - UnprovableResult [Line: 17]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 76. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; VAL [ea=-127, eb=127] [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L251] RET, EXPR base2flt(0, 0) VAL [ea=-127, eb=127] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-127, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L76] EXPR m & ~ (1U << 24U) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] EXPR m | ((unsigned int )(e + 128) << 24U) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=0] [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-127, \old(m)=16777216, __retres4=16777216, e=-127, m=0, res=16777216] [L80] return (__retres4); [L252] RET, EXPR base2flt(ma, ea) VAL [ea=-127, eb=127, ma=16777216, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554432] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L29] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L57] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L59] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L64] COND TRUE e >= 127 [L65] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L80] return (__retres4); [L253] RET, EXPR base2flt(mb, eb) VAL [a=16777216, ea=-127, eb=127, ma=16777216, mb=33554432, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) VAL [a=16777216, b=4294967295, ea=-127, eb=127, ma=16777216, mb=33554432, zero=0] [L258] COND TRUE a > zero [L259] tmp = 1 VAL [a=16777216, b=4294967295, ea=-127, eb=127, ma=16777216, mb=33554432, tmp=1, zero=0] [L263] sa = tmp VAL [a=16777216, b=4294967295, ea=-127, eb=127, ma=16777216, mb=33554432, sa=1, tmp=1, zero=0] [L265] COND FALSE !(b < zero) VAL [a=16777216, b=4294967295, ea=-127, eb=127, ma=16777216, mb=33554432, sa=1, tmp=1, zero=0] [L268] COND TRUE b > zero [L269] tmp___0 = 1 VAL [a=16777216, b=4294967295, ea=-127, eb=127, ma=16777216, mb=33554432, sa=1, tmp=1, tmp___0=1, zero=0] [L273] sb = tmp___0 VAL [a=16777216, b=4294967295, ea=-127, eb=127, ma=16777216, mb=33554432, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=16777216, \old(b)=4294967295, a=16777216, b=4294967295] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, tmp=16777216] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, ma=16777215, tmp=16777216] [L110] EXPR ma | (1U << 24U) VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, ma=16777215, tmp=16777216] [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, eb=-127, ma=16777216, mb=0, tmp=16777216] [L113] EXPR mb | (1U << 24U) VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, eb=-127, ma=16777216, mb=0, tmp=16777216] [L113] mb = mb | (1U << 24U) [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, eb=-127, ma=16777216, mb=16777216, tmp=16777216] [L115] delta = ea - eb VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, delta=254, ea=127, eb=-127, ma=16777216, mb=16777216, tmp=16777216] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.7s, OverallIterations: 29, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 2615 SdHoareTripleChecker+Valid, 6.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2512 mSDsluCounter, 22102 SdHoareTripleChecker+Invalid, 5.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18295 mSDsCounter, 199 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4943 IncrementalHoareTripleChecker+Invalid, 5143 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 199 mSolverCounterUnsat, 3807 mSDtfsCounter, 4943 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1259 GetRequests, 971 SyntacticMatches, 2 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=532occurred in iteration=23, InterpolantAutomatonStates: 219, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 28 MinimizatonAttempts, 986 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 1882 NumberOfCodeBlocks, 1866 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 1997 ConstructedInterpolants, 0 QuantifiedInterpolants, 4804 SizeOfPredicates, 66 NumberOfNonLiveVariables, 1882 ConjunctsInSsa, 257 ConjunctsInUnsatCore, 46 InterpolantComputations, 24 PerfectInterpolantSequences, 577/640 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-18 21:56:28,671 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...