/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/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:29:28,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:29:28,731 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 10:29:28,735 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:29:28,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:29:28,757 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:29:28,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:29:28,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:29:28,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:29:28,761 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:29:28,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:29:28,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:29:28,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:29:28,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:29:28,763 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:29:28,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:29:28,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:29:28,763 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:29:28,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:29:28,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:29:28,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:29:28,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:29:28,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:29:28,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:29:28,764 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:29:28,764 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:29:28,765 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:29:28,765 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:29:28,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:29:28,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:29:28,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:29:28,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:29:28,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:29:28,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:29:28,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:29:28,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:29:28,767 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:29:28,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:29:28,767 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:29:28,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:29:28,767 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:29:28,767 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:29:28,767 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:29:28,767 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:29:28,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:29:28,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:29:28,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:29:28,955 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:29:28,957 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:29:28,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2023-12-21 10:29:29,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:29:30,144 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:29:30,144 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2023-12-21 10:29:30,149 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f439de8/adf234154e05402ab75bda736b64467d/FLAGfe60f52c2 [2023-12-21 10:29:30,160 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f439de8/adf234154e05402ab75bda736b64467d [2023-12-21 10:29:30,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:29:30,163 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:29:30,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:29:30,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:29:30,168 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:29:30,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e394558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30, skipping insertion in model container [2023-12-21 10:29:30,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,182 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:29:30,295 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/id_i15_o15-1.c[454,467] [2023-12-21 10:29:30,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:29:30,311 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:29:30,320 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/id_i15_o15-1.c[454,467] [2023-12-21 10:29:30,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:29:30,330 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:29:30,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30 WrapperNode [2023-12-21 10:29:30,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:29:30,332 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:29:30,332 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:29:30,332 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:29:30,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,341 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,351 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2023-12-21 10:29:30,352 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:29:30,353 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:29:30,353 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:29:30,353 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:29:30,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,360 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,367 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 10:29:30,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,372 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,374 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,375 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,376 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:29:30,377 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:29:30,377 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:29:30,377 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:29:30,377 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (1/1) ... [2023-12-21 10:29:30,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:29:30,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:30,434 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 10:29:30,451 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 10:29:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:29:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:29:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:29:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:29:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-12-21 10:29:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-12-21 10:29:30,511 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:29:30,513 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:29:30,615 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:29:30,626 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:29:30,626 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-21 10:29:30,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:29:30 BoogieIcfgContainer [2023-12-21 10:29:30,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:29:30,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:29:30,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:29:30,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:29:30,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:29:30" (1/3) ... [2023-12-21 10:29:30,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd2221d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:29:30, skipping insertion in model container [2023-12-21 10:29:30,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:30" (2/3) ... [2023-12-21 10:29:30,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd2221d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:29:30, skipping insertion in model container [2023-12-21 10:29:30,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:29:30" (3/3) ... [2023-12-21 10:29:30,634 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2023-12-21 10:29:30,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:29:30,647 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:29:30,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:29:30,692 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;@59e2226d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:29:30,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:29:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 10:29:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 10:29:30,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:30,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:30,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:30,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2023-12-21 10:29:30,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:30,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497417784] [2023-12-21 10:29:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:30,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:30,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:30,907 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 10:29:30,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497417784] [2023-12-21 10:29:30,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497417784] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:29:30,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:29:30,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 10:29:30,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782540299] [2023-12-21 10:29:30,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:29:30,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 10:29:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 10:29:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 10:29:30,931 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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 10:29:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:30,983 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-12-21 10:29:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 10:29:30,985 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 10:29:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:30,989 INFO L225 Difference]: With dead ends: 22 [2023-12-21 10:29:30,989 INFO L226 Difference]: Without dead ends: 14 [2023-12-21 10:29:30,991 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 10:29:30,993 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:31,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-21 10:29:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-21 10:29:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-21 10:29:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-12-21 10:29:31,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-12-21 10:29:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:31,039 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-12-21 10:29:31,040 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 10:29:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-12-21 10:29:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 10:29:31,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:31,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:31,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 10:29:31,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:31,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:31,042 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2023-12-21 10:29:31,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:31,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264920874] [2023-12-21 10:29:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:31,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:31,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:31,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:31,232 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 10:29:31,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:31,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264920874] [2023-12-21 10:29:31,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264920874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:31,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90348702] [2023-12-21 10:29:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:31,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:31,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:31,236 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 10:29:31,264 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 10:29:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:31,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 10:29:31,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 10:29:31,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:31,571 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 10:29:31,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90348702] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:31,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:31,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2023-12-21 10:29:31,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663046883] [2023-12-21 10:29:31,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:31,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 10:29:31,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 10:29:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-12-21 10:29:31,574 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 10:29:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:31,614 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-12-21 10:29:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 10:29:31,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) Word has length 15 [2023-12-21 10:29:31,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:31,615 INFO L225 Difference]: With dead ends: 21 [2023-12-21 10:29:31,615 INFO L226 Difference]: Without dead ends: 17 [2023-12-21 10:29:31,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-12-21 10:29:31,616 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:31,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-21 10:29:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-21 10:29:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 10:29:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-21 10:29:31,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-12-21 10:29:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:31,620 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-21 10:29:31,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 10:29:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-21 10:29:31,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 10:29:31,621 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:31,621 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:31,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 10:29:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:31,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:31,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2023-12-21 10:29:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088669755] [2023-12-21 10:29:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:31,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:31,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:32,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 10:29:32,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:32,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088669755] [2023-12-21 10:29:32,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088669755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:32,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252698533] [2023-12-21 10:29:32,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:29:32,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:32,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:32,075 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 10:29:32,091 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 10:29:32,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:29:32,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:32,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 10:29:32,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 10:29:32,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 10:29:32,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252698533] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:32,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:32,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 15 [2023-12-21 10:29:32,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906155494] [2023-12-21 10:29:32,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:32,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 10:29:32,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:32,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 10:29:32,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-12-21 10:29:32,398 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 10:29:32,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:32,438 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-12-21 10:29:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 10:29:32,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) Word has length 21 [2023-12-21 10:29:32,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:32,439 INFO L225 Difference]: With dead ends: 24 [2023-12-21 10:29:32,439 INFO L226 Difference]: Without dead ends: 20 [2023-12-21 10:29:32,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:29:32,440 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:32,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-21 10:29:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-21 10:29:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 10:29:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-12-21 10:29:32,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2023-12-21 10:29:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:32,444 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-12-21 10:29:32,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 10:29:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-12-21 10:29:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 10:29:32,445 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:32,445 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:32,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 10:29:32,650 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,SelfDestructingSolverStorable2 [2023-12-21 10:29:32,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:32,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2023-12-21 10:29:32,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:32,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451506723] [2023-12-21 10:29:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:32,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:32,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:32,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:32,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:32,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 10:29:32,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:32,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451506723] [2023-12-21 10:29:32,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451506723] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:32,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433357630] [2023-12-21 10:29:32,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:29:32,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:32,837 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 10:29:32,843 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 10:29:32,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 10:29:32,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:32,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 10:29:32,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 10:29:32,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:29:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433357630] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:33,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:33,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2023-12-21 10:29:33,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566963965] [2023-12-21 10:29:33,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:33,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 10:29:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 10:29:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-21 10:29:33,264 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (12), 4 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-21 10:29:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:33,308 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-12-21 10:29:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 10:29:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (12), 4 states have call predecessors, (12), 8 states have call successors, (12) Word has length 27 [2023-12-21 10:29:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:33,309 INFO L225 Difference]: With dead ends: 27 [2023-12-21 10:29:33,309 INFO L226 Difference]: Without dead ends: 23 [2023-12-21 10:29:33,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-12-21 10:29:33,310 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:33,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-21 10:29:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-21 10:29:33,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:29:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-12-21 10:29:33,314 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2023-12-21 10:29:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:33,314 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-12-21 10:29:33,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (12), 4 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-21 10:29:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-12-21 10:29:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-21 10:29:33,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:33,315 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:33,332 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 10:29:33,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:33,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:33,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:33,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2023-12-21 10:29:33,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:33,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615041374] [2023-12-21 10:29:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:33,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:33,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:33,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:33,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:33,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:33,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 10:29:33,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:33,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615041374] [2023-12-21 10:29:33,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615041374] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:33,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356663497] [2023-12-21 10:29:33,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 10:29:33,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:33,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:33,701 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 10:29:33,731 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 10:29:33,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 10:29:33,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:33,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 10:29:33,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 10:29:33,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 10:29:34,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356663497] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:34,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:34,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 19 [2023-12-21 10:29:34,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287441914] [2023-12-21 10:29:34,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:34,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 10:29:34,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:34,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 10:29:34,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-12-21 10:29:34,308 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 19 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2023-12-21 10:29:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:34,364 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-12-21 10:29:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 10:29:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) Word has length 33 [2023-12-21 10:29:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:34,365 INFO L225 Difference]: With dead ends: 30 [2023-12-21 10:29:34,366 INFO L226 Difference]: Without dead ends: 26 [2023-12-21 10:29:34,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2023-12-21 10:29:34,367 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:34,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 50 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-21 10:29:34,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-21 10:29:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-21 10:29:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-12-21 10:29:34,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2023-12-21 10:29:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:34,376 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-12-21 10:29:34,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2023-12-21 10:29:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-12-21 10:29:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-21 10:29:34,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:34,377 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:34,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-21 10:29:34,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:34,582 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:34,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:34,583 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2023-12-21 10:29:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206399436] [2023-12-21 10:29:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:34,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:34,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:34,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:34,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:34,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:34,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-21 10:29:34,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206399436] [2023-12-21 10:29:34,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206399436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593818163] [2023-12-21 10:29:34,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 10:29:34,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:34,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:34,737 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 10:29:34,763 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 10:29:34,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-21 10:29:34,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:34,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 10:29:34,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 10:29:34,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 10:29:35,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593818163] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:35,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:35,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 21 [2023-12-21 10:29:35,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906216261] [2023-12-21 10:29:35,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:35,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 10:29:35,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 10:29:35,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-12-21 10:29:35,492 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (18), 6 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-21 10:29:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:35,548 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-12-21 10:29:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 10:29:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (18), 6 states have call predecessors, (18), 10 states have call successors, (18) Word has length 39 [2023-12-21 10:29:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:35,550 INFO L225 Difference]: With dead ends: 33 [2023-12-21 10:29:35,550 INFO L226 Difference]: Without dead ends: 29 [2023-12-21 10:29:35,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2023-12-21 10:29:35,552 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:35,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 52 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-21 10:29:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-21 10:29:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-21 10:29:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-12-21 10:29:35,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2023-12-21 10:29:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:35,564 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-12-21 10:29:35,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (18), 6 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-21 10:29:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-12-21 10:29:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 10:29:35,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:35,584 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:35,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-21 10:29:35,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:35,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:35,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:35,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2023-12-21 10:29:35,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:35,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242482690] [2023-12-21 10:29:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:35,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:35,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:35,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:36,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:36,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:36,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:36,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:36,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-21 10:29:36,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:36,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242482690] [2023-12-21 10:29:36,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242482690] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:36,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105271149] [2023-12-21 10:29:36,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 10:29:36,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:36,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:36,124 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 10:29:36,152 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 10:29:36,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-21 10:29:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:36,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 10:29:36,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-21 10:29:36,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 10:29:37,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105271149] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:37,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:37,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 23 [2023-12-21 10:29:37,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521825584] [2023-12-21 10:29:37,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:37,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 10:29:37,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 10:29:37,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-12-21 10:29:37,401 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 23 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (21), 7 states have call predecessors, (21), 11 states have call successors, (21) [2023-12-21 10:29:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:37,482 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-12-21 10:29:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 10:29:37,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (21), 7 states have call predecessors, (21), 11 states have call successors, (21) Word has length 45 [2023-12-21 10:29:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:37,484 INFO L225 Difference]: With dead ends: 36 [2023-12-21 10:29:37,485 INFO L226 Difference]: Without dead ends: 32 [2023-12-21 10:29:37,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2023-12-21 10:29:37,486 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:37,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 54 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-21 10:29:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-21 10:29:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-21 10:29:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-12-21 10:29:37,494 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2023-12-21 10:29:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:37,495 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-12-21 10:29:37,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (21), 7 states have call predecessors, (21), 11 states have call successors, (21) [2023-12-21 10:29:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-12-21 10:29:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-21 10:29:37,500 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:37,500 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:37,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 10:29:37,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:37,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:37,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2023-12-21 10:29:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:37,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042812310] [2023-12-21 10:29:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:37,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:37,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:37,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:37,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:37,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:37,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:37,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:37,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-21 10:29:37,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:37,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042812310] [2023-12-21 10:29:37,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042812310] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:37,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843488562] [2023-12-21 10:29:37,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 10:29:37,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:37,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:37,975 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 10:29:38,042 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 10:29:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:38,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 10:29:38,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-21 10:29:38,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 10:29:39,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843488562] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:39,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:39,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 25 [2023-12-21 10:29:39,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758801457] [2023-12-21 10:29:39,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:39,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 10:29:39,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 10:29:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2023-12-21 10:29:39,897 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2023-12-21 10:29:39,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:39,983 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-12-21 10:29:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 10:29:39,984 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) Word has length 51 [2023-12-21 10:29:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:39,984 INFO L225 Difference]: With dead ends: 39 [2023-12-21 10:29:39,985 INFO L226 Difference]: Without dead ends: 35 [2023-12-21 10:29:39,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 10:29:39,986 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:39,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 61 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:39,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-21 10:29:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-21 10:29:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-21 10:29:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-12-21 10:29:39,989 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2023-12-21 10:29:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:39,989 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-12-21 10:29:39,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2023-12-21 10:29:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-12-21 10:29:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-21 10:29:39,990 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:39,990 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:39,996 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 10:29:40,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:40,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:40,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:40,196 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2023-12-21 10:29:40,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:40,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448818144] [2023-12-21 10:29:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:40,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-21 10:29:40,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:40,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448818144] [2023-12-21 10:29:40,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448818144] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:40,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255425307] [2023-12-21 10:29:40,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:29:40,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:40,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:40,563 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 10:29:40,608 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 10:29:40,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:29:40,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:40,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-21 10:29:40,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-21 10:29:40,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 10:29:42,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255425307] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:42,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:42,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 27 [2023-12-21 10:29:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261551103] [2023-12-21 10:29:42,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:42,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 10:29:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 10:29:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2023-12-21 10:29:42,677 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 27 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (27), 9 states have call predecessors, (27), 13 states have call successors, (27) [2023-12-21 10:29:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:42,794 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2023-12-21 10:29:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 10:29:42,796 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (27), 9 states have call predecessors, (27), 13 states have call successors, (27) Word has length 57 [2023-12-21 10:29:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:42,797 INFO L225 Difference]: With dead ends: 42 [2023-12-21 10:29:42,797 INFO L226 Difference]: Without dead ends: 38 [2023-12-21 10:29:42,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=391, Invalid=869, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 10:29:42,798 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:42,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 71 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:29:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-21 10:29:42,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-21 10:29:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-21 10:29:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-12-21 10:29:42,801 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2023-12-21 10:29:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:42,801 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-12-21 10:29:42,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (27), 9 states have call predecessors, (27), 13 states have call successors, (27) [2023-12-21 10:29:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-12-21 10:29:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-21 10:29:42,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:42,802 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:42,809 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 10:29:43,007 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,SelfDestructingSolverStorable8 [2023-12-21 10:29:43,008 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:43,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2023-12-21 10:29:43,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:43,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626467121] [2023-12-21 10:29:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:43,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-21 10:29:43,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:43,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626467121] [2023-12-21 10:29:43,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626467121] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:43,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682788739] [2023-12-21 10:29:43,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:29:43,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:43,382 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 10:29:43,427 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 10:29:43,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-21 10:29:43,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:43,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 10:29:43,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-21 10:29:43,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-21 10:29:46,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682788739] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:46,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:46,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 29 [2023-12-21 10:29:46,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383053256] [2023-12-21 10:29:46,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:46,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-21 10:29:46,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:46,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-21 10:29:46,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2023-12-21 10:29:46,778 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 29 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (30), 10 states have call predecessors, (30), 14 states have call successors, (30) [2023-12-21 10:29:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:46,866 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-12-21 10:29:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 10:29:46,873 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (30), 10 states have call predecessors, (30), 14 states have call successors, (30) Word has length 63 [2023-12-21 10:29:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:46,874 INFO L225 Difference]: With dead ends: 45 [2023-12-21 10:29:46,874 INFO L226 Difference]: Without dead ends: 41 [2023-12-21 10:29:46,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=462, Invalid=1020, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 10:29:46,875 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 92 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:46,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 74 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-21 10:29:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-12-21 10:29:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-21 10:29:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-12-21 10:29:46,878 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2023-12-21 10:29:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:46,878 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-12-21 10:29:46,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (30), 10 states have call predecessors, (30), 14 states have call successors, (30) [2023-12-21 10:29:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-12-21 10:29:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-21 10:29:46,879 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:46,879 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:46,889 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 10:29:47,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 10:29:47,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:47,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2023-12-21 10:29:47,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:47,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730415762] [2023-12-21 10:29:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:47,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-21 10:29:47,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:47,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730415762] [2023-12-21 10:29:47,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730415762] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:47,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903398985] [2023-12-21 10:29:47,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 10:29:47,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:47,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:47,490 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 10:29:47,492 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 10:29:47,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 10:29:47,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:47,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-21 10:29:47,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-21 10:29:47,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-21 10:29:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903398985] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:51,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:51,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 31 [2023-12-21 10:29:51,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551512341] [2023-12-21 10:29:51,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 10:29:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 10:29:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2023-12-21 10:29:51,528 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (33), 11 states have call predecessors, (33), 15 states have call successors, (33) [2023-12-21 10:29:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:51,612 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-12-21 10:29:51,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 10:29:51,612 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (33), 11 states have call predecessors, (33), 15 states have call successors, (33) Word has length 69 [2023-12-21 10:29:51,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:51,613 INFO L225 Difference]: With dead ends: 48 [2023-12-21 10:29:51,613 INFO L226 Difference]: Without dead ends: 44 [2023-12-21 10:29:51,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 131 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=539, Invalid=1183, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 10:29:51,614 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:51,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 73 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-21 10:29:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-21 10:29:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-21 10:29:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-12-21 10:29:51,616 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2023-12-21 10:29:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:51,617 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-12-21 10:29:51,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (33), 11 states have call predecessors, (33), 15 states have call successors, (33) [2023-12-21 10:29:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-12-21 10:29:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-21 10:29:51,617 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:51,617 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:51,623 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 10:29:51,823 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,SelfDestructingSolverStorable10 [2023-12-21 10:29:51,823 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:51,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2023-12-21 10:29:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:51,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361963582] [2023-12-21 10:29:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:51,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:51,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:51,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-21 10:29:52,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:52,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361963582] [2023-12-21 10:29:52,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361963582] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:52,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154832557] [2023-12-21 10:29:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 10:29:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:52,248 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:29:52,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 10:29:52,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-12-21 10:29:52,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:52,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-21 10:29:52,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-12-21 10:29:52,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:29:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-21 10:29:57,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154832557] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:29:57,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:29:57,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 33 [2023-12-21 10:29:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782213570] [2023-12-21 10:29:57,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:29:57,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 10:29:57,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:29:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 10:29:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 10:29:57,112 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 33 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (36), 12 states have call predecessors, (36), 16 states have call successors, (36) [2023-12-21 10:29:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:29:57,224 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-12-21 10:29:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 10:29:57,225 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (36), 12 states have call predecessors, (36), 16 states have call successors, (36) Word has length 75 [2023-12-21 10:29:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:29:57,225 INFO L225 Difference]: With dead ends: 51 [2023-12-21 10:29:57,225 INFO L226 Difference]: Without dead ends: 47 [2023-12-21 10:29:57,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 143 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=622, Invalid=1358, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 10:29:57,226 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:29:57,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 81 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:29:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-21 10:29:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-12-21 10:29:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-21 10:29:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-12-21 10:29:57,229 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2023-12-21 10:29:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:29:57,230 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-12-21 10:29:57,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (36), 12 states have call predecessors, (36), 16 states have call successors, (36) [2023-12-21 10:29:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-12-21 10:29:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-21 10:29:57,230 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:29:57,230 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:29:57,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-21 10:29:57,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-21 10:29:57,440 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:29:57,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:29:57,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1158839228, now seen corresponding path program 12 times [2023-12-21 10:29:57,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:29:57,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293983988] [2023-12-21 10:29:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:29:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:29:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:29:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:57,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:29:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:29:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-21 10:29:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:29:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293983988] [2023-12-21 10:29:58,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293983988] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:29:58,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102593297] [2023-12-21 10:29:58,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 10:29:58,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:29:58,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:29:58,009 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:29:58,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 10:29:58,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-12-21 10:29:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:29:58,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 10:29:58,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:29:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-21 10:29:58,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:30:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-21 10:30:04,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102593297] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:30:04,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:30:04,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 35 [2023-12-21 10:30:04,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914875798] [2023-12-21 10:30:04,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:30:04,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-21 10:30:04,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:30:04,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-21 10:30:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 10:30:04,019 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 35 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (39), 13 states have call predecessors, (39), 17 states have call successors, (39) [2023-12-21 10:30:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:30:04,177 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2023-12-21 10:30:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 10:30:04,178 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (39), 13 states have call predecessors, (39), 17 states have call successors, (39) Word has length 81 [2023-12-21 10:30:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:30:04,180 INFO L225 Difference]: With dead ends: 54 [2023-12-21 10:30:04,180 INFO L226 Difference]: Without dead ends: 50 [2023-12-21 10:30:04,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 155 SyntacticMatches, 13 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=711, Invalid=1545, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 10:30:04,182 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 223 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:30:04,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 84 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:30:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-21 10:30:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-21 10:30:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-21 10:30:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-12-21 10:30:04,197 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2023-12-21 10:30:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:30:04,197 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-12-21 10:30:04,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (39), 13 states have call predecessors, (39), 17 states have call successors, (39) [2023-12-21 10:30:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-12-21 10:30:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-21 10:30:04,199 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:30:04,199 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:30:04,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 10:30:04,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 10:30:04,405 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:30:04,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:30:04,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1570097358, now seen corresponding path program 13 times [2023-12-21 10:30:04,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:30:04,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613894762] [2023-12-21 10:30:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:30:04,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:30:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:30:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-12-21 10:30:04,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:30:04,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613894762] [2023-12-21 10:30:04,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613894762] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:30:04,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67596557] [2023-12-21 10:30:04,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 10:30:04,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:30:04,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:30:04,977 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:30:04,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 10:30:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:05,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 10:30:05,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:30:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-21 10:30:05,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:30:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-21 10:30:12,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67596557] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:30:12,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:30:12,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 37 [2023-12-21 10:30:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656373307] [2023-12-21 10:30:12,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:30:12,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-21 10:30:12,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:30:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-21 10:30:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 10:30:12,703 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 37 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (42), 14 states have call predecessors, (42), 18 states have call successors, (42) [2023-12-21 10:30:12,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:30:12,860 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2023-12-21 10:30:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 10:30:12,860 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (42), 14 states have call predecessors, (42), 18 states have call successors, (42) Word has length 87 [2023-12-21 10:30:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:30:12,861 INFO L225 Difference]: With dead ends: 57 [2023-12-21 10:30:12,861 INFO L226 Difference]: Without dead ends: 53 [2023-12-21 10:30:12,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 167 SyntacticMatches, 14 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=806, Invalid=1744, Unknown=0, NotChecked=0, Total=2550 [2023-12-21 10:30:12,862 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 110 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:30:12,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 92 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:30:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-21 10:30:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-21 10:30:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-21 10:30:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-12-21 10:30:12,865 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2023-12-21 10:30:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:30:12,865 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-12-21 10:30:12,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (42), 14 states have call predecessors, (42), 18 states have call successors, (42) [2023-12-21 10:30:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-12-21 10:30:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-21 10:30:12,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:30:12,866 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:30:12,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 10:30:13,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-21 10:30:13,071 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:30:13,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:30:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1407069436, now seen corresponding path program 14 times [2023-12-21 10:30:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:30:13,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831717024] [2023-12-21 10:30:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:30:13,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:30:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:30:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-12-21 10:30:13,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:30:13,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831717024] [2023-12-21 10:30:13,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831717024] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:30:13,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294586208] [2023-12-21 10:30:13,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:30:13,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:30:13,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:30:13,770 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:30:13,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 10:30:14,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:30:14,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:30:14,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-21 10:30:14,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:30:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-12-21 10:30:14,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:30:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-21 10:30:24,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294586208] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:30:24,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:30:24,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2023-12-21 10:30:24,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265081355] [2023-12-21 10:30:24,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:30:24,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 10:30:24,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:30:24,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 10:30:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 10:30:24,222 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2023-12-21 10:30:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:30:24,449 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2023-12-21 10:30:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 10:30:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 93 [2023-12-21 10:30:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:30:24,450 INFO L225 Difference]: With dead ends: 60 [2023-12-21 10:30:24,450 INFO L226 Difference]: Without dead ends: 56 [2023-12-21 10:30:24,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 179 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=1853, Unknown=0, NotChecked=0, Total=2756 [2023-12-21 10:30:24,452 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:30:24,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 111 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:30:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-21 10:30:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-12-21 10:30:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-21 10:30:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-12-21 10:30:24,455 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2023-12-21 10:30:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:30:24,455 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-12-21 10:30:24,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2023-12-21 10:30:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-12-21 10:30:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-21 10:30:24,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:30:24,456 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:30:24,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 10:30:24,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:30:24,669 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:30:24,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:30:24,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1758730226, now seen corresponding path program 15 times [2023-12-21 10:30:24,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:30:24,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681935215] [2023-12-21 10:30:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:30:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:30:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:24,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:30:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:24,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:24,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 15 proven. 345 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-21 10:30:25,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:30:25,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681935215] [2023-12-21 10:30:25,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681935215] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:30:25,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46690592] [2023-12-21 10:30:25,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 10:30:25,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:30:25,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:30:25,829 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:30:25,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 10:30:26,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-12-21 10:30:26,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:30:26,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-21 10:30:26,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:30:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-12-21 10:30:26,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:30:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-12-21 10:30:27,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46690592] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:30:27,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:30:27,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 37 [2023-12-21 10:30:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496434845] [2023-12-21 10:30:27,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:30:27,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-21 10:30:27,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:30:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-21 10:30:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 10:30:27,383 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 21 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 16 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-21 10:30:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:30:28,215 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2023-12-21 10:30:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-21 10:30:28,216 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 21 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 16 states have call predecessors, (17), 1 states have call successors, (17) Word has length 99 [2023-12-21 10:30:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:30:28,216 INFO L225 Difference]: With dead ends: 63 [2023-12-21 10:30:28,216 INFO L226 Difference]: Without dead ends: 59 [2023-12-21 10:30:28,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2023-12-21 10:30:28,218 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:30:28,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 683 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 10:30:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-21 10:30:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-21 10:30:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-21 10:30:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2023-12-21 10:30:28,222 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2023-12-21 10:30:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:30:28,222 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2023-12-21 10:30:28,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 21 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 16 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-21 10:30:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2023-12-21 10:30:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-21 10:30:28,223 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:30:28,223 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:30:28,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 10:30:28,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 10:30:28,432 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:30:28,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:30:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1678126652, now seen corresponding path program 16 times [2023-12-21 10:30:28,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:30:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216498513] [2023-12-21 10:30:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:30:28,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:30:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:28,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:30:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:28,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:28,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:28,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:28,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:28,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:28,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:30:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:30:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 48 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-12-21 10:30:29,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:30:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216498513] [2023-12-21 10:30:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216498513] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:30:29,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470674908] [2023-12-21 10:30:29,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 10:30:29,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:30:29,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:30:29,233 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:30:29,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 10:30:29,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 10:30:29,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:30:29,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-21 10:30:29,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:30:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-12-21 10:30:30,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:30:30,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470674908] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:30:30,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:30:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 25 [2023-12-21 10:30:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388094038] [2023-12-21 10:30:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:30:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 10:30:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:30:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 10:30:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2023-12-21 10:30:30,104 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-21 10:30:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:30:30,320 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2023-12-21 10:30:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 10:30:30,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) Word has length 105 [2023-12-21 10:30:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:30:30,321 INFO L225 Difference]: With dead ends: 59 [2023-12-21 10:30:30,321 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 10:30:30,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=1194, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 10:30:30,322 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:30:30,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 154 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:30:30,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 10:30:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 10:30:30,322 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 10:30:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 10:30:30,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2023-12-21 10:30:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:30:30,323 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 10:30:30,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-21 10:30:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 10:30:30,323 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 10:30:30,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 10:30:30,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 10:30:30,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 10:30:30,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 10:30:30,542 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L895 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (= |ULTIMATE.start_main_~input~0#1| 15) [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 6 9) the Hoare annotation is: true [2023-12-21 10:30:30,543 INFO L895 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-12-21 10:30:30,543 INFO L899 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2023-12-21 10:30:30,545 INFO L445 BasicCegarLoop]: Path program histogram: [16, 1] [2023-12-21 10:30:30,547 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 10:30:30,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:30:30 BoogieIcfgContainer [2023-12-21 10:30:30,549 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 10:30:30,549 INFO L158 Benchmark]: Toolchain (without parser) took 60386.58ms. Allocated memory was 240.1MB in the beginning and 720.4MB in the end (delta: 480.2MB). Free memory was 193.2MB in the beginning and 600.9MB in the end (delta: -407.7MB). Peak memory consumption was 73.6MB. Max. memory is 8.0GB. [2023-12-21 10:30:30,549 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 198.2MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 10:30:30,549 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.79ms. Allocated memory is still 240.1MB. Free memory was 192.9MB in the beginning and 182.7MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-12-21 10:30:30,549 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.04ms. Allocated memory is still 240.1MB. Free memory was 182.7MB in the beginning and 181.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 10:30:30,550 INFO L158 Benchmark]: Boogie Preprocessor took 23.21ms. Allocated memory is still 240.1MB. Free memory was 181.0MB in the beginning and 179.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 10:30:30,550 INFO L158 Benchmark]: RCFGBuilder took 250.21ms. Allocated memory is still 240.1MB. Free memory was 179.7MB in the beginning and 170.6MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-12-21 10:30:30,550 INFO L158 Benchmark]: TraceAbstraction took 59918.88ms. Allocated memory was 240.1MB in the beginning and 720.4MB in the end (delta: 480.2MB). Free memory was 169.8MB in the beginning and 600.9MB in the end (delta: -431.1MB). Peak memory consumption was 49.5MB. Max. memory is 8.0GB. [2023-12-21 10:30:30,551 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 198.2MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 166.79ms. Allocated memory is still 240.1MB. Free memory was 192.9MB in the beginning and 182.7MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.04ms. Allocated memory is still 240.1MB. Free memory was 182.7MB in the beginning and 181.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.21ms. Allocated memory is still 240.1MB. Free memory was 181.0MB in the beginning and 179.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 250.21ms. Allocated memory is still 240.1MB. Free memory was 179.7MB in the beginning and 170.6MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 59918.88ms. Allocated memory was 240.1MB in the beginning and 720.4MB in the end (delta: 480.2MB). Free memory was 169.8MB in the beginning and 600.9MB in the end (delta: -431.1MB). Peak memory consumption was 49.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: 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 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 59.9s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1265 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1097 mSDsluCounter, 1769 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1591 mSDsCounter, 414 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2363 IncrementalHoareTripleChecker+Invalid, 2777 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 414 mSolverCounterUnsat, 178 mSDtfsCounter, 2363 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2462 GetRequests, 1778 SyntacticMatches, 120 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7178 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=16, InterpolantAutomatonStates: 237, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 7 HoareAnnotationTreeSize, 5 FormulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FormulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 49.2s InterpolantComputationTime, 1929 NumberOfCodeBlocks, 1929 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2736 ConstructedInterpolants, 0 QuantifiedInterpolants, 7826 SizeOfPredicates, 136 NumberOfNonLiveVariables, 2576 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 6160/13088 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 10:30:30,574 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...