/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:28:31,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:28:31,258 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 10:28:31,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:28:31,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:28:31,283 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:28:31,284 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:28:31,284 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:28:31,284 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:28:31,287 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:28:31,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:28:31,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:28:31,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:28:31,289 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:28:31,290 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:28:31,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:28:31,290 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:28:31,290 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:28:31,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:28:31,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:28:31,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:28:31,291 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:28:31,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:28:31,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:28:31,291 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:28:31,292 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:28:31,292 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:28:31,292 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:28:31,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:28:31,293 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:28:31,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:28:31,293 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:28:31,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:28:31,294 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:28:31,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:28:31,294 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:28:31,294 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:28:31,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:28:31,294 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:28:31,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:28:31,295 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:28:31,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:28:31,295 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:28:31,295 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:28:31,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:28:31,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:28:31,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:28:31,487 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:28:31,488 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:28:31,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2023-12-21 10:28:32,488 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:28:32,641 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:28:32,642 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2023-12-21 10:28:32,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acd8dfaa8/bae27deeb155432ea080c3359ba08f4c/FLAG4482d1270 [2023-12-21 10:28:32,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acd8dfaa8/bae27deeb155432ea080c3359ba08f4c [2023-12-21 10:28:32,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:28:32,661 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:28:32,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:28:32,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:28:32,667 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:28:32,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519a0715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32, skipping insertion in model container [2023-12-21 10:28:32,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,683 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:28:32,806 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c[946,959] [2023-12-21 10:28:32,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:28:32,817 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:28:32,829 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c[946,959] [2023-12-21 10:28:32,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:28:32,840 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:28:32,840 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32 WrapperNode [2023-12-21 10:28:32,841 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:28:32,842 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:28:32,842 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:28:32,842 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:28:32,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,850 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,860 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2023-12-21 10:28:32,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:28:32,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:28:32,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:28:32,861 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:28:32,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,874 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,886 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]. [2023-12-21 10:28:32,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,895 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,899 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:28:32,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:28:32,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:28:32,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:28:32,902 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (1/1) ... [2023-12-21 10:28:32,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:28:32,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:32,937 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) [2023-12-21 10:28:32,965 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 [2023-12-21 10:28:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:28:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:28:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-12-21 10:28:32,976 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-12-21 10:28:32,976 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-12-21 10:28:32,976 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-12-21 10:28:32,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:28:32,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:28:33,019 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:28:33,021 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:28:33,149 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:28:33,170 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:28:33,170 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-21 10:28:33,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:33 BoogieIcfgContainer [2023-12-21 10:28:33,170 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:28:33,172 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:28:33,172 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:28:33,174 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:28:33,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:28:32" (1/3) ... [2023-12-21 10:28:33,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58662b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:33, skipping insertion in model container [2023-12-21 10:28:33,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:32" (2/3) ... [2023-12-21 10:28:33,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58662b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:33, skipping insertion in model container [2023-12-21 10:28:33,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:33" (3/3) ... [2023-12-21 10:28:33,176 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2023-12-21 10:28:33,188 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:28:33,188 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:28:33,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:28:33,230 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;@1f3a2975, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:28:33,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:28:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 10:28:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 10:28:33,238 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:33,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:33,239 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:33,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:33,243 INFO L85 PathProgramCache]: Analyzing trace with hash -389521846, now seen corresponding path program 1 times [2023-12-21 10:28:33,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:33,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230688253] [2023-12-21 10:28:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:33,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:33,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:28:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:33,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230688253] [2023-12-21 10:28:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230688253] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:28:33,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:28:33,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 10:28:33,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533502435] [2023-12-21 10:28:33,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:28:33,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 10:28:33,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:33,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 10:28:33,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 10:28:33,488 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:28:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:33,573 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-12-21 10:28:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 10:28:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-21 10:28:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:33,580 INFO L225 Difference]: With dead ends: 34 [2023-12-21 10:28:33,580 INFO L226 Difference]: Without dead ends: 26 [2023-12-21 10:28:33,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 10:28:33,587 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:33,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 73 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:28:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-21 10:28:33,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-21 10:28:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 10:28:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-21 10:28:33,612 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2023-12-21 10:28:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:33,613 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-21 10:28:33,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:28:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-21 10:28:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 10:28:33,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:33,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:33,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 10:28:33,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:33,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1524884472, now seen corresponding path program 1 times [2023-12-21 10:28:33,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:33,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567849943] [2023-12-21 10:28:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:33,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:33,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:28:33,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:33,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567849943] [2023-12-21 10:28:33,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567849943] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:28:33,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:28:33,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 10:28:33,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500257215] [2023-12-21 10:28:33,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:28:33,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 10:28:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 10:28:33,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 10:28:33,734 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:28:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:33,796 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-12-21 10:28:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 10:28:33,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-21 10:28:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:33,797 INFO L225 Difference]: With dead ends: 32 [2023-12-21 10:28:33,797 INFO L226 Difference]: Without dead ends: 28 [2023-12-21 10:28:33,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 10:28:33,798 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:33,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:28:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-21 10:28:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-12-21 10:28:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-21 10:28:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-21 10:28:33,803 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2023-12-21 10:28:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:33,804 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-21 10:28:33,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 10:28:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-21 10:28:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 10:28:33,805 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:33,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:33,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 10:28:33,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:33,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:33,805 INFO L85 PathProgramCache]: Analyzing trace with hash 741502751, now seen corresponding path program 1 times [2023-12-21 10:28:33,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:33,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767906685] [2023-12-21 10:28:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:33,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:33,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:33,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:33,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 10:28:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:28:33,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:33,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767906685] [2023-12-21 10:28:33,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767906685] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:33,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383987703] [2023-12-21 10:28:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:33,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:33,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:33,983 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) [2023-12-21 10:28:34,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 10:28:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:34,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 10:28:34,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:28:34,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:28:34,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383987703] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:34,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:34,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-12-21 10:28:34,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204857150] [2023-12-21 10:28:34,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:34,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 10:28:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 10:28:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-21 10:28:34,292 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 10:28:34,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:34,414 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2023-12-21 10:28:34,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 10:28:34,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 22 [2023-12-21 10:28:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:34,415 INFO L225 Difference]: With dead ends: 54 [2023-12-21 10:28:34,415 INFO L226 Difference]: Without dead ends: 30 [2023-12-21 10:28:34,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:28:34,417 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:34,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:34,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-21 10:28:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-12-21 10:28:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 10:28:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-12-21 10:28:34,422 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 22 [2023-12-21 10:28:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:34,422 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-12-21 10:28:34,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 10:28:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-12-21 10:28:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 10:28:34,423 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:34,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:34,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:34,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:34,629 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:34,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1785876995, now seen corresponding path program 1 times [2023-12-21 10:28:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:34,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20945444] [2023-12-21 10:28:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:34,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:34,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:34,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:34,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:28:34,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20945444] [2023-12-21 10:28:34,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20945444] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230222354] [2023-12-21 10:28:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:34,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:34,773 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) [2023-12-21 10:28:34,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 10:28:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:34,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 10:28:34,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:28:34,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:28:34,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230222354] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:34,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:34,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-12-21 10:28:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169458901] [2023-12-21 10:28:34,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:34,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 10:28:34,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 10:28:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-21 10:28:34,953 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 10:28:35,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:35,052 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2023-12-21 10:28:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 10:28:35,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 23 [2023-12-21 10:28:35,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:35,055 INFO L225 Difference]: With dead ends: 50 [2023-12-21 10:28:35,055 INFO L226 Difference]: Without dead ends: 46 [2023-12-21 10:28:35,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-12-21 10:28:35,056 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:35,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 63 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-21 10:28:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-12-21 10:28:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2023-12-21 10:28:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-12-21 10:28:35,063 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 23 [2023-12-21 10:28:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:35,063 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-12-21 10:28:35,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 10:28:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-12-21 10:28:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 10:28:35,064 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:35,065 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] [2023-12-21 10:28:35,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 10:28:35,269 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 [2023-12-21 10:28:35,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:35,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:35,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1754399412, now seen corresponding path program 1 times [2023-12-21 10:28:35,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:35,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310050889] [2023-12-21 10:28:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:35,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:35,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:35,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:35,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:35,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-21 10:28:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:35,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-21 10:28:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:28:35,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:35,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310050889] [2023-12-21 10:28:35,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310050889] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:35,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779859891] [2023-12-21 10:28:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:35,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:35,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:35,429 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) [2023-12-21 10:28:35,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 10:28:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:35,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 10:28:35,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 10:28:35,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:28:35,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779859891] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:35,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:35,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2023-12-21 10:28:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283351627] [2023-12-21 10:28:35,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 10:28:35,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 10:28:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-12-21 10:28:35,790 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-21 10:28:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:35,935 INFO L93 Difference]: Finished difference Result 104 states and 166 transitions. [2023-12-21 10:28:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 10:28:35,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 35 [2023-12-21 10:28:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:35,943 INFO L225 Difference]: With dead ends: 104 [2023-12-21 10:28:35,943 INFO L226 Difference]: Without dead ends: 62 [2023-12-21 10:28:35,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-12-21 10:28:35,944 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:35,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 130 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-21 10:28:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-21 10:28:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.25) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-12-21 10:28:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 91 transitions. [2023-12-21 10:28:35,962 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 91 transitions. Word has length 35 [2023-12-21 10:28:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:35,962 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 91 transitions. [2023-12-21 10:28:35,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-21 10:28:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 91 transitions. [2023-12-21 10:28:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 10:28:35,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:35,963 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] [2023-12-21 10:28:35,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:36,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:36,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:36,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2101254926, now seen corresponding path program 1 times [2023-12-21 10:28:36,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:36,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593960312] [2023-12-21 10:28:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:36,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:36,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:36,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:36,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:36,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:36,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 10:28:36,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593960312] [2023-12-21 10:28:36,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593960312] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668263715] [2023-12-21 10:28:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:36,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:36,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:36,313 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) [2023-12-21 10:28:36,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 10:28:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:36,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 10:28:36,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:28:36,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:28:36,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668263715] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:36,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:36,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2023-12-21 10:28:36,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736762325] [2023-12-21 10:28:36,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:36,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 10:28:36,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 10:28:36,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:28:36,650 INFO L87 Difference]: Start difference. First operand 62 states and 91 transitions. Second operand has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-21 10:28:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:36,888 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2023-12-21 10:28:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 10:28:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2023-12-21 10:28:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:36,894 INFO L225 Difference]: With dead ends: 176 [2023-12-21 10:28:36,894 INFO L226 Difference]: Without dead ends: 116 [2023-12-21 10:28:36,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2023-12-21 10:28:36,898 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 48 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:36,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 217 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:28:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-21 10:28:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2023-12-21 10:28:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 68 states have internal predecessors, (79), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2023-12-21 10:28:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 165 transitions. [2023-12-21 10:28:36,921 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 165 transitions. Word has length 36 [2023-12-21 10:28:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:36,922 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 165 transitions. [2023-12-21 10:28:36,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-21 10:28:36,922 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 165 transitions. [2023-12-21 10:28:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-21 10:28:36,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:36,924 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:36,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:37,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:37,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:37,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash 644290867, now seen corresponding path program 1 times [2023-12-21 10:28:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:37,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208002818] [2023-12-21 10:28:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:37,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:37,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:37,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:37,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:37,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:37,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:37,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:37,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-21 10:28:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-21 10:28:37,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:37,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208002818] [2023-12-21 10:28:37,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208002818] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:37,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187176215] [2023-12-21 10:28:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:37,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:37,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:37,260 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) [2023-12-21 10:28:37,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 10:28:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:37,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 10:28:37,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 10:28:37,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 10:28:37,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187176215] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:37,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:37,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2023-12-21 10:28:37,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244529516] [2023-12-21 10:28:37,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:37,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 10:28:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 10:28:37,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-12-21 10:28:37,779 INFO L87 Difference]: Start difference. First operand 102 states and 165 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2023-12-21 10:28:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:38,071 INFO L93 Difference]: Finished difference Result 254 states and 494 transitions. [2023-12-21 10:28:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 10:28:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) Word has length 50 [2023-12-21 10:28:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:38,072 INFO L225 Difference]: With dead ends: 254 [2023-12-21 10:28:38,073 INFO L226 Difference]: Without dead ends: 154 [2023-12-21 10:28:38,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2023-12-21 10:28:38,097 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:38,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 266 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:28:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-21 10:28:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 108. [2023-12-21 10:28:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2023-12-21 10:28:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 176 transitions. [2023-12-21 10:28:38,125 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 176 transitions. Word has length 50 [2023-12-21 10:28:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:38,125 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 176 transitions. [2023-12-21 10:28:38,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2023-12-21 10:28:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 176 transitions. [2023-12-21 10:28:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-21 10:28:38,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:38,142 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:38,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:38,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:38,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:38,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -110138383, now seen corresponding path program 1 times [2023-12-21 10:28:38,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:38,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658415362] [2023-12-21 10:28:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:38,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-21 10:28:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-21 10:28:38,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:38,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658415362] [2023-12-21 10:28:38,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658415362] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:38,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105883451] [2023-12-21 10:28:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:38,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:38,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:38,616 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) [2023-12-21 10:28:38,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 10:28:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:38,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 10:28:38,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-12-21 10:28:38,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 60 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-21 10:28:38,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105883451] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:38,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:38,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 19 [2023-12-21 10:28:38,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798278487] [2023-12-21 10:28:38,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:38,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 10:28:38,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 10:28:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-12-21 10:28:39,000 INFO L87 Difference]: Start difference. First operand 108 states and 176 transitions. Second operand has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2023-12-21 10:28:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:39,219 INFO L93 Difference]: Finished difference Result 240 states and 470 transitions. [2023-12-21 10:28:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 10:28:39,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) Word has length 106 [2023-12-21 10:28:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:39,220 INFO L225 Difference]: With dead ends: 240 [2023-12-21 10:28:39,221 INFO L226 Difference]: Without dead ends: 119 [2023-12-21 10:28:39,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 231 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-12-21 10:28:39,222 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:39,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 225 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:28:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-21 10:28:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2023-12-21 10:28:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 66 states have internal predecessors, (79), 19 states have call successors, (19), 10 states have call predecessors, (19), 12 states have return successors, (52), 20 states have call predecessors, (52), 19 states have call successors, (52) [2023-12-21 10:28:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 150 transitions. [2023-12-21 10:28:39,243 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 150 transitions. Word has length 106 [2023-12-21 10:28:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:39,244 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 150 transitions. [2023-12-21 10:28:39,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2023-12-21 10:28:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 150 transitions. [2023-12-21 10:28:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 10:28:39,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:39,246 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:39,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-21 10:28:39,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:39,451 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:39,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:39,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2094396074, now seen corresponding path program 1 times [2023-12-21 10:28:39,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:39,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250279330] [2023-12-21 10:28:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:39,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-12-21 10:28:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-21 10:28:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 108 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-12-21 10:28:39,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:39,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250279330] [2023-12-21 10:28:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250279330] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:39,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357620840] [2023-12-21 10:28:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:39,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:39,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:39,801 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) [2023-12-21 10:28:39,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 10:28:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:39,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 10:28:39,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 101 proven. 35 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-12-21 10:28:39,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 101 proven. 41 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-12-21 10:28:40,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357620840] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:40,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:40,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 11] total 30 [2023-12-21 10:28:40,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753519576] [2023-12-21 10:28:40,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:40,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 10:28:40,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:40,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 10:28:40,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2023-12-21 10:28:40,375 INFO L87 Difference]: Start difference. First operand 97 states and 150 transitions. Second operand has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 30 states have internal predecessors, (83), 17 states have call successors, (24), 1 states have call predecessors, (24), 13 states have return successors, (30), 20 states have call predecessors, (30), 17 states have call successors, (30) [2023-12-21 10:28:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:40,807 INFO L93 Difference]: Finished difference Result 209 states and 364 transitions. [2023-12-21 10:28:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-21 10:28:40,807 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 30 states have internal predecessors, (83), 17 states have call successors, (24), 1 states have call predecessors, (24), 13 states have return successors, (30), 20 states have call predecessors, (30), 17 states have call successors, (30) Word has length 119 [2023-12-21 10:28:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:40,810 INFO L225 Difference]: With dead ends: 209 [2023-12-21 10:28:40,810 INFO L226 Difference]: Without dead ends: 119 [2023-12-21 10:28:40,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 256 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=2268, Unknown=0, NotChecked=0, Total=2652 [2023-12-21 10:28:40,812 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 89 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:40,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 281 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:28:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-21 10:28:40,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2023-12-21 10:28:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 65 states have internal predecessors, (78), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (36), 18 states have call predecessors, (36), 15 states have call successors, (36) [2023-12-21 10:28:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 129 transitions. [2023-12-21 10:28:40,818 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 129 transitions. Word has length 119 [2023-12-21 10:28:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:40,818 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 129 transitions. [2023-12-21 10:28:40,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 30 states have internal predecessors, (83), 17 states have call successors, (24), 1 states have call predecessors, (24), 13 states have return successors, (30), 20 states have call predecessors, (30), 17 states have call successors, (30) [2023-12-21 10:28:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 129 transitions. [2023-12-21 10:28:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-21 10:28:40,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:40,819 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:40,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:41,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:41,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:41,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:41,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1780776373, now seen corresponding path program 2 times [2023-12-21 10:28:41,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:41,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868016157] [2023-12-21 10:28:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:41,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-12-21 10:28:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-21 10:28:41,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:41,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868016157] [2023-12-21 10:28:41,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868016157] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:41,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325398480] [2023-12-21 10:28:41,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:28:41,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:41,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:41,556 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) [2023-12-21 10:28:41,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 10:28:41,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:28:41,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:28:41,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-21 10:28:41,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-21 10:28:41,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-21 10:28:42,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325398480] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:42,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:42,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2023-12-21 10:28:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992680701] [2023-12-21 10:28:42,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:42,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 10:28:42,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 10:28:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2023-12-21 10:28:42,179 INFO L87 Difference]: Start difference. First operand 97 states and 129 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2023-12-21 10:28:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:42,367 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2023-12-21 10:28:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 10:28:42,367 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) Word has length 105 [2023-12-21 10:28:42,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:42,368 INFO L225 Difference]: With dead ends: 116 [2023-12-21 10:28:42,368 INFO L226 Difference]: Without dead ends: 112 [2023-12-21 10:28:42,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2023-12-21 10:28:42,369 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:42,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 990 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:28:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-21 10:28:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2023-12-21 10:28:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 75 states have (on average 1.12) internal successors, (84), 71 states have internal predecessors, (84), 17 states have call successors, (17), 13 states have call predecessors, (17), 14 states have return successors, (45), 22 states have call predecessors, (45), 17 states have call successors, (45) [2023-12-21 10:28:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 146 transitions. [2023-12-21 10:28:42,374 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 146 transitions. Word has length 105 [2023-12-21 10:28:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:42,375 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 146 transitions. [2023-12-21 10:28:42,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2023-12-21 10:28:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 146 transitions. [2023-12-21 10:28:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-21 10:28:42,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:42,376 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:42,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:42,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 10:28:42,581 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:42,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 453542388, now seen corresponding path program 3 times [2023-12-21 10:28:42,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:42,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734691187] [2023-12-21 10:28:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:42,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-12-21 10:28:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 79 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-12-21 10:28:42,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:42,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734691187] [2023-12-21 10:28:42,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734691187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:42,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375041108] [2023-12-21 10:28:42,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:28:42,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:42,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:42,793 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) [2023-12-21 10:28:42,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 10:28:42,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 10:28:42,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:28:42,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 10:28:42,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 13 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-21 10:28:42,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 14 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-12-21 10:28:43,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375041108] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:43,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:43,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 20 [2023-12-21 10:28:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925571464] [2023-12-21 10:28:43,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 10:28:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:43,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 10:28:43,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-12-21 10:28:43,201 INFO L87 Difference]: Start difference. First operand 107 states and 146 transitions. Second operand has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 10 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (22), 14 states have call predecessors, (22), 10 states have call successors, (22) [2023-12-21 10:28:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:43,360 INFO L93 Difference]: Finished difference Result 219 states and 319 transitions. [2023-12-21 10:28:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 10:28:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 10 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (22), 14 states have call predecessors, (22), 10 states have call successors, (22) Word has length 91 [2023-12-21 10:28:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:43,362 INFO L225 Difference]: With dead ends: 219 [2023-12-21 10:28:43,362 INFO L226 Difference]: Without dead ends: 121 [2023-12-21 10:28:43,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-12-21 10:28:43,363 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:43,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 208 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-21 10:28:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2023-12-21 10:28:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 72 states have internal predecessors, (86), 17 states have call successors, (17), 14 states have call predecessors, (17), 14 states have return successors, (38), 22 states have call predecessors, (38), 17 states have call successors, (38) [2023-12-21 10:28:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2023-12-21 10:28:43,371 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 91 [2023-12-21 10:28:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:43,372 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2023-12-21 10:28:43,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 10 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (22), 14 states have call predecessors, (22), 10 states have call successors, (22) [2023-12-21 10:28:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2023-12-21 10:28:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 10:28:43,373 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:28:43,373 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:43,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:43,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:43,579 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:28:43,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:28:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1334835348, now seen corresponding path program 1 times [2023-12-21 10:28:43,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:28:43,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165259701] [2023-12-21 10:28:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:28:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:28:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:28:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-21 10:28:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-21 10:28:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-21 10:28:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:28:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-21 10:28:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 61 proven. 94 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-12-21 10:28:43,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:28:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165259701] [2023-12-21 10:28:43,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165259701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:28:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255680937] [2023-12-21 10:28:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:28:43,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:28:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:28:43,814 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) [2023-12-21 10:28:43,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 10:28:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:28:43,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 10:28:43,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:28:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 133 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-12-21 10:28:43,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:28:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 147 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-12-21 10:28:44,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255680937] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:28:44,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:28:44,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 24 [2023-12-21 10:28:44,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643036827] [2023-12-21 10:28:44,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:28:44,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 10:28:44,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:28:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 10:28:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-12-21 10:28:44,919 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 19 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (31), 10 states have call predecessors, (31), 19 states have call successors, (31) [2023-12-21 10:28:45,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:28:45,083 INFO L93 Difference]: Finished difference Result 217 states and 308 transitions. [2023-12-21 10:28:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 10:28:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 19 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (31), 10 states have call predecessors, (31), 19 states have call successors, (31) Word has length 119 [2023-12-21 10:28:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:28:45,083 INFO L225 Difference]: With dead ends: 217 [2023-12-21 10:28:45,083 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 10:28:45,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 253 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2023-12-21 10:28:45,085 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:28:45,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 271 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:28:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 10:28:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 10:28:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 10:28:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 10:28:45,085 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 119 [2023-12-21 10:28:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:28:45,086 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 10:28:45,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 19 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (31), 10 states have call predecessors, (31), 19 states have call successors, (31) [2023-12-21 10:28:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 10:28:45,086 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 10:28:45,088 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 10:28:45,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 10:28:45,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-21 10:28:45,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 10:28:45,730 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-21 10:28:45,730 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2023-12-21 10:28:45,730 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-21 10:28:45,730 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2023-12-21 10:28:45,730 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2023-12-21 10:28:45,730 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= 5 |ULTIMATE.start_main_~x~0#1|) [2023-12-21 10:28:45,730 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2023-12-21 10:28:45,731 INFO L899 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2023-12-21 10:28:45,731 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 2 |fibo2_#in~n|)) [2023-12-21 10:28:45,731 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-12-21 10:28:45,731 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (let ((.cse0 (and (= |fibo2_#t~ret6| 1) (= 3 |fibo2_#in~n|)))) (and (or (<= 5 |fibo2_#in~n|) (= |fibo2_#t~ret6| 2) .cse0) (= fibo2_~n |fibo2_#in~n|) (or (= fibo2_~n 4) (< 4 |fibo2_#in~n|) .cse0))) [2023-12-21 10:28:45,731 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2023-12-21 10:28:45,731 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2023-12-21 10:28:45,731 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2023-12-21 10:28:45,731 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2023-12-21 10:28:45,731 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 27) the Hoare annotation is: true [2023-12-21 10:28:45,731 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2023-12-21 10:28:45,731 INFO L895 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (< 1 |fibo1_#in~n|) (= fibo1_~n |fibo1_#in~n|)) [2023-12-21 10:28:45,731 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2023-12-21 10:28:45,731 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= |fibo1_#t~ret4| 1))) (or (and .cse0 (= fibo1_~n 2)) (and (= 3 |fibo1_#t~ret4|) (= 5 |fibo1_#in~n|)) (and (<= 4 fibo1_~n) (<= |fibo1_#in~n| 4)) (<= 6 |fibo1_#in~n|) (and (= 3 |fibo1_#in~n|) .cse0))) (= fibo1_~n |fibo1_#in~n|)) [2023-12-21 10:28:45,731 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2023-12-21 10:28:45,732 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2023-12-21 10:28:45,732 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2023-12-21 10:28:45,732 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2023-12-21 10:28:45,732 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 17) the Hoare annotation is: true [2023-12-21 10:28:45,732 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2023-12-21 10:28:45,734 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:28:45,735 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 10:28:45,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:28:45 BoogieIcfgContainer [2023-12-21 10:28:45,737 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 10:28:45,738 INFO L158 Benchmark]: Toolchain (without parser) took 13077.03ms. Allocated memory was 250.6MB in the beginning and 361.8MB in the end (delta: 111.1MB). Free memory was 206.9MB in the beginning and 316.3MB in the end (delta: -109.4MB). Peak memory consumption was 201.5MB. Max. memory is 8.0GB. [2023-12-21 10:28:45,738 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 208.7MB. Free memory is still 159.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 10:28:45,738 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.96ms. Allocated memory is still 250.6MB. Free memory was 206.5MB in the beginning and 196.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 10:28:45,738 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.86ms. Allocated memory is still 250.6MB. Free memory was 196.0MB in the beginning and 194.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 10:28:45,738 INFO L158 Benchmark]: Boogie Preprocessor took 39.16ms. Allocated memory is still 250.6MB. Free memory was 194.7MB in the beginning and 192.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 10:28:45,738 INFO L158 Benchmark]: RCFGBuilder took 269.56ms. Allocated memory is still 250.6MB. Free memory was 192.9MB in the beginning and 182.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 10:28:45,739 INFO L158 Benchmark]: TraceAbstraction took 12565.58ms. Allocated memory was 250.6MB in the beginning and 361.8MB in the end (delta: 111.1MB). Free memory was 181.8MB in the beginning and 316.3MB in the end (delta: -134.5MB). Peak memory consumption was 176.3MB. Max. memory is 8.0GB. [2023-12-21 10:28:45,739 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 208.7MB. Free memory is still 159.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 177.96ms. Allocated memory is still 250.6MB. Free memory was 206.5MB in the beginning and 196.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.86ms. Allocated memory is still 250.6MB. Free memory was 196.0MB in the beginning and 194.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.16ms. Allocated memory is still 250.6MB. Free memory was 194.7MB in the beginning and 192.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 269.56ms. Allocated memory is still 250.6MB. Free memory was 192.9MB in the beginning and 182.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 12565.58ms. Allocated memory was 250.6MB in the beginning and 361.8MB in the end (delta: 111.1MB). Free memory was 181.8MB in the beginning and 316.3MB in the end (delta: -134.5MB). Peak memory consumption was 176.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.5s, OverallIterations: 12, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 535 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 476 mSDsluCounter, 2890 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2573 mSDsCounter, 352 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3348 IncrementalHoareTripleChecker+Invalid, 3700 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 352 mSolverCounterUnsat, 317 mSDtfsCounter, 3348 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1818 GetRequests, 1526 SyntacticMatches, 35 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=11, InterpolantAutomatonStates: 188, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 127 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 424 PreInvPairs, 516 NumberOfFragments, 87 HoareAnnotationTreeSize, 424 FormulaSimplifications, 2721 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FormulaSimplificationsInter, 1470 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 1431 NumberOfCodeBlocks, 1390 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 2105 ConstructedInterpolants, 0 QuantifiedInterpolants, 4201 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1686 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 3399/4584 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-21 10:28:45,753 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...