/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 18:36:14,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 18:36:14,441 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 18:36:14,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 18:36:14,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 18:36:14,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 18:36:14,474 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 18:36:14,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 18:36:14,475 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 18:36:14,477 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 18:36:14,478 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 18:36:14,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 18:36:14,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 18:36:14,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 18:36:14,480 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 18:36:14,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 18:36:14,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 18:36:14,480 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 18:36:14,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 18:36:14,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 18:36:14,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 18:36:14,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 18:36:14,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 18:36:14,481 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 18:36:14,481 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 18:36:14,481 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 18:36:14,482 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 18:36:14,482 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 18:36:14,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 18:36:14,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 18:36:14,483 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 18:36:14,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 18:36:14,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:36:14,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 18:36:14,484 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 18:36:14,484 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 18:36:14,484 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 18:36:14,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 18:36:14,484 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 18:36:14,484 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 18:36:14,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 18:36:14,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 18:36:14,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 18:36:14,485 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 18:36:14,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 18:36:14,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 18:36:14,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 18:36:14,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 18:36:14,666 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 18:36:14,666 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2023-12-19 18:36:15,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 18:36:15,795 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 18:36:15,796 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2023-12-19 18:36:15,800 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcf2ef3d0/309f2292d92244669c676f6fa8e7b55e/FLAG5880d7e9f [2023-12-19 18:36:15,809 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcf2ef3d0/309f2292d92244669c676f6fa8e7b55e [2023-12-19 18:36:15,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 18:36:15,811 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 18:36:15,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 18:36:15,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 18:36:15,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 18:36:15,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:15,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447896e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15, skipping insertion in model container [2023-12-19 18:36:15,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:15,841 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 18:36:15,929 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2023-12-19 18:36:15,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:36:15,943 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 18:36:15,950 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2023-12-19 18:36:15,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 18:36:15,971 INFO L206 MainTranslator]: Completed translation [2023-12-19 18:36:15,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15 WrapperNode [2023-12-19 18:36:15,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 18:36:15,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 18:36:15,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 18:36:15,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 18:36:15,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:15,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:15,998 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2023-12-19 18:36:15,998 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 18:36:15,999 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 18:36:15,999 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 18:36:15,999 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 18:36:16,009 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,010 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,017 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]. [2023-12-19 18:36:16,018 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,020 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,022 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,023 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,024 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 18:36:16,024 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 18:36:16,024 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 18:36:16,024 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 18:36:16,025 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (1/1) ... [2023-12-19 18:36:16,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 18:36:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:36:16,056 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) [2023-12-19 18:36:16,065 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 [2023-12-19 18:36:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 18:36:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 18:36:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 18:36:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 18:36:16,118 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 18:36:16,119 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 18:36:16,235 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 18:36:16,258 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 18:36:16,259 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 18:36:16,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:36:16 BoogieIcfgContainer [2023-12-19 18:36:16,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 18:36:16,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 18:36:16,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 18:36:16,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 18:36:16,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 06:36:15" (1/3) ... [2023-12-19 18:36:16,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ef064d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:36:16, skipping insertion in model container [2023-12-19 18:36:16,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:36:15" (2/3) ... [2023-12-19 18:36:16,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ef064d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:36:16, skipping insertion in model container [2023-12-19 18:36:16,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:36:16" (3/3) ... [2023-12-19 18:36:16,265 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2023-12-19 18:36:16,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 18:36:16,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 18:36:16,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 18:36:16,323 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;@52f20aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 18:36:16,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 18:36:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-19 18:36:16,332 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:16,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:16,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:16,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1500602288, now seen corresponding path program 1 times [2023-12-19 18:36:16,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:16,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490867101] [2023-12-19 18:36:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:16,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:16,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:16,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490867101] [2023-12-19 18:36:16,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490867101] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:36:16,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:36:16,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 18:36:16,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769748773] [2023-12-19 18:36:16,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:36:16,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 18:36:16,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 18:36:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 18:36:16,517 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-12-19 18:36:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:16,540 INFO L93 Difference]: Finished difference Result 32 states and 52 transitions. [2023-12-19 18:36:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 18:36:16,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-19 18:36:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:16,562 INFO L225 Difference]: With dead ends: 32 [2023-12-19 18:36:16,562 INFO L226 Difference]: Without dead ends: 16 [2023-12-19 18:36:16,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 18:36:16,566 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:16,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:36:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-19 18:36:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-19 18:36:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2023-12-19 18:36:16,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2023-12-19 18:36:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:16,590 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2023-12-19 18:36:16,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-12-19 18:36:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2023-12-19 18:36:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-19 18:36:16,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:16,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:16,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 18:36:16,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:16,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash -65030621, now seen corresponding path program 1 times [2023-12-19 18:36:16,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:16,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192664274] [2023-12-19 18:36:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:16,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:16,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:16,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192664274] [2023-12-19 18:36:16,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192664274] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:36:16,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:36:16,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:36:16,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571661424] [2023-12-19 18:36:16,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:36:16,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 18:36:16,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 18:36:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:36:16,718 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-12-19 18:36:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:16,763 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2023-12-19 18:36:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 18:36:16,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-19 18:36:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:16,765 INFO L225 Difference]: With dead ends: 33 [2023-12-19 18:36:16,765 INFO L226 Difference]: Without dead ends: 20 [2023-12-19 18:36:16,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:36:16,766 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:16,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:36:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-19 18:36:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2023-12-19 18:36:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-12-19 18:36:16,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 11 [2023-12-19 18:36:16,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:16,770 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-12-19 18:36:16,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-12-19 18:36:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-12-19 18:36:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-19 18:36:16,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:16,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:16,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-19 18:36:16,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:16,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1812390471, now seen corresponding path program 1 times [2023-12-19 18:36:16,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:16,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350477405] [2023-12-19 18:36:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:16,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:36:16,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:16,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350477405] [2023-12-19 18:36:16,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350477405] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:36:16,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:36:16,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:36:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142895662] [2023-12-19 18:36:16,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:36:16,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 18:36:16,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 18:36:16,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:36:16,869 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-12-19 18:36:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:16,898 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2023-12-19 18:36:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 18:36:16,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-19 18:36:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:16,899 INFO L225 Difference]: With dead ends: 40 [2023-12-19 18:36:16,899 INFO L226 Difference]: Without dead ends: 26 [2023-12-19 18:36:16,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:36:16,900 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:16,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:36:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-19 18:36:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2023-12-19 18:36:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 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) [2023-12-19 18:36:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-12-19 18:36:16,904 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 14 [2023-12-19 18:36:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:16,904 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-12-19 18:36:16,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-12-19 18:36:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-12-19 18:36:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-19 18:36:16,904 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:16,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:16,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-19 18:36:16,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:16,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1869648773, now seen corresponding path program 1 times [2023-12-19 18:36:16,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:16,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142320224] [2023-12-19 18:36:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:16,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 18:36:17,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:17,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142320224] [2023-12-19 18:36:17,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142320224] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:36:17,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:36:17,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:36:17,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968312236] [2023-12-19 18:36:17,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:36:17,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 18:36:17,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:17,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 18:36:17,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:36:17,022 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-12-19 18:36:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:17,057 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2023-12-19 18:36:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 18:36:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-19 18:36:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:17,059 INFO L225 Difference]: With dead ends: 48 [2023-12-19 18:36:17,059 INFO L226 Difference]: Without dead ends: 33 [2023-12-19 18:36:17,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-19 18:36:17,060 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:17,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:36:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-19 18:36:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-12-19 18:36:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2023-12-19 18:36:17,065 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 14 [2023-12-19 18:36:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:17,065 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2023-12-19 18:36:17,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-12-19 18:36:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2023-12-19 18:36:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-19 18:36:17,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:17,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:17,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-19 18:36:17,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:17,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:17,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1869708355, now seen corresponding path program 1 times [2023-12-19 18:36:17,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:17,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925877407] [2023-12-19 18:36:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:17,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:17,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:17,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925877407] [2023-12-19 18:36:17,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925877407] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:36:17,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205137493] [2023-12-19 18:36:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:17,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:17,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:36:17,129 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) [2023-12-19 18:36:17,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 18:36:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:17,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 18:36:17,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:36:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:17,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:36:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:17,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205137493] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:36:17,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:36:17,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-12-19 18:36:17,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743981918] [2023-12-19 18:36:17,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:36:17,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 18:36:17,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:17,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 18:36:17,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-12-19 18:36:17,248 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2023-12-19 18:36:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:17,305 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2023-12-19 18:36:17,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 18:36:17,305 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-19 18:36:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:17,307 INFO L225 Difference]: With dead ends: 78 [2023-12-19 18:36:17,307 INFO L226 Difference]: Without dead ends: 50 [2023-12-19 18:36:17,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-12-19 18:36:17,312 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:17,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 26 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:36:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-19 18:36:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-12-19 18:36:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2023-12-19 18:36:17,322 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 14 [2023-12-19 18:36:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:17,322 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2023-12-19 18:36:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2023-12-19 18:36:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2023-12-19 18:36:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-19 18:36:17,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:17,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:17,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 18:36:17,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:17,528 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:17,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash -584062177, now seen corresponding path program 2 times [2023-12-19 18:36:17,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:17,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393055342] [2023-12-19 18:36:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:17,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:17,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393055342] [2023-12-19 18:36:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393055342] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:36:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418657555] [2023-12-19 18:36:17,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:36:17,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:36:17,602 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) [2023-12-19 18:36:17,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 18:36:17,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:36:17,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:36:17,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 18:36:17,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:36:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:36:17,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:36:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 18:36:17,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418657555] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:36:17,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:36:17,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-12-19 18:36:17,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830979664] [2023-12-19 18:36:17,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:36:17,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 18:36:17,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:17,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 18:36:17,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-12-19 18:36:17,755 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 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) [2023-12-19 18:36:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:18,088 INFO L93 Difference]: Finished difference Result 209 states and 293 transitions. [2023-12-19 18:36:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 18:36:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-19 18:36:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:18,089 INFO L225 Difference]: With dead ends: 209 [2023-12-19 18:36:18,089 INFO L226 Difference]: Without dead ends: 163 [2023-12-19 18:36:18,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=951, Unknown=0, NotChecked=0, Total=1332 [2023-12-19 18:36:18,090 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 262 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:18,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 75 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:36:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-12-19 18:36:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 141. [2023-12-19 18:36:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2785714285714285) internal successors, (179), 140 states have internal predecessors, (179), 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) [2023-12-19 18:36:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 179 transitions. [2023-12-19 18:36:18,106 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 179 transitions. Word has length 23 [2023-12-19 18:36:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:18,106 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 179 transitions. [2023-12-19 18:36:18,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 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) [2023-12-19 18:36:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 179 transitions. [2023-12-19 18:36:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-19 18:36:18,107 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:18,107 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:18,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-19 18:36:18,311 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,SelfDestructingSolverStorable5 [2023-12-19 18:36:18,311 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:18,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:18,312 INFO L85 PathProgramCache]: Analyzing trace with hash -268676385, now seen corresponding path program 1 times [2023-12-19 18:36:18,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:18,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690732584] [2023-12-19 18:36:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:18,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-19 18:36:18,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690732584] [2023-12-19 18:36:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690732584] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:36:18,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:36:18,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:36:18,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598464984] [2023-12-19 18:36:18,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:36:18,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 18:36:18,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 18:36:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:36:18,342 INFO L87 Difference]: Start difference. First operand 141 states and 179 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-12-19 18:36:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:18,363 INFO L93 Difference]: Finished difference Result 330 states and 424 transitions. [2023-12-19 18:36:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 18:36:18,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-19 18:36:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:18,365 INFO L225 Difference]: With dead ends: 330 [2023-12-19 18:36:18,365 INFO L226 Difference]: Without dead ends: 192 [2023-12-19 18:36:18,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:36:18,366 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:18,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:36:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-19 18:36:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 143. [2023-12-19 18:36:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.267605633802817) internal successors, (180), 142 states have internal predecessors, (180), 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) [2023-12-19 18:36:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 180 transitions. [2023-12-19 18:36:18,380 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 180 transitions. Word has length 29 [2023-12-19 18:36:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:18,380 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 180 transitions. [2023-12-19 18:36:18,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-12-19 18:36:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 180 transitions. [2023-12-19 18:36:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-19 18:36:18,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:18,381 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:18,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-19 18:36:18,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:18,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash -653810757, now seen corresponding path program 1 times [2023-12-19 18:36:18,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:18,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479376973] [2023-12-19 18:36:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-19 18:36:18,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:18,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479376973] [2023-12-19 18:36:18,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479376973] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:36:18,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:36:18,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 18:36:18,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137245085] [2023-12-19 18:36:18,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:36:18,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 18:36:18,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 18:36:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:36:18,407 INFO L87 Difference]: Start difference. First operand 143 states and 180 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:18,428 INFO L93 Difference]: Finished difference Result 230 states and 290 transitions. [2023-12-19 18:36:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 18:36:18,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-19 18:36:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:18,428 INFO L225 Difference]: With dead ends: 230 [2023-12-19 18:36:18,429 INFO L226 Difference]: Without dead ends: 159 [2023-12-19 18:36:18,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 18:36:18,429 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:18,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:36:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-19 18:36:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2023-12-19 18:36:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.2465753424657535) internal successors, (182), 146 states have internal predecessors, (182), 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) [2023-12-19 18:36:18,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 182 transitions. [2023-12-19 18:36:18,441 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 182 transitions. Word has length 30 [2023-12-19 18:36:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:18,441 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 182 transitions. [2023-12-19 18:36:18,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 182 transitions. [2023-12-19 18:36:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-19 18:36:18,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:18,442 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:18,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-19 18:36:18,442 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:18,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:18,442 INFO L85 PathProgramCache]: Analyzing trace with hash -651904133, now seen corresponding path program 1 times [2023-12-19 18:36:18,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:18,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2456409] [2023-12-19 18:36:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:18,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:18,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:18,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2456409] [2023-12-19 18:36:18,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2456409] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:36:18,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833727800] [2023-12-19 18:36:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:18,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:18,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:36:18,535 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) [2023-12-19 18:36:18,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 18:36:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:18,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 18:36:18,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:36:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:18,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:36:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:18,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833727800] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:36:18,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:36:18,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-12-19 18:36:18,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056092566] [2023-12-19 18:36:18,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:36:18,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-19 18:36:18,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:18,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-19 18:36:18,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2023-12-19 18:36:18,746 INFO L87 Difference]: Start difference. First operand 147 states and 182 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:18,921 INFO L93 Difference]: Finished difference Result 436 states and 586 transitions. [2023-12-19 18:36:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 18:36:18,922 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-19 18:36:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:18,923 INFO L225 Difference]: With dead ends: 436 [2023-12-19 18:36:18,923 INFO L226 Difference]: Without dead ends: 292 [2023-12-19 18:36:18,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2023-12-19 18:36:18,924 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:18,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 30 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:36:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-19 18:36:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2023-12-19 18:36:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.2344827586206897) internal successors, (358), 290 states have internal predecessors, (358), 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) [2023-12-19 18:36:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 358 transitions. [2023-12-19 18:36:18,938 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 358 transitions. Word has length 30 [2023-12-19 18:36:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:18,938 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 358 transitions. [2023-12-19 18:36:18,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 358 transitions. [2023-12-19 18:36:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-19 18:36:18,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:18,939 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:18,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 18:36:19,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:19,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:19,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:19,144 INFO L85 PathProgramCache]: Analyzing trace with hash -393067141, now seen corresponding path program 2 times [2023-12-19 18:36:19,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:19,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784951271] [2023-12-19 18:36:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:19,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:19,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:19,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784951271] [2023-12-19 18:36:19,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784951271] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:36:19,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889751794] [2023-12-19 18:36:19,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:36:19,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:19,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:36:19,378 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) [2023-12-19 18:36:19,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 18:36:19,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:36:19,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:36:19,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 18:36:19,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:36:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:19,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:36:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:19,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889751794] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:36:19,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:36:19,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2023-12-19 18:36:19,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316496024] [2023-12-19 18:36:19,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:36:19,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-19 18:36:19,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:19,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-19 18:36:19,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2023-12-19 18:36:19,935 INFO L87 Difference]: Start difference. First operand 291 states and 358 transitions. Second operand has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 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) [2023-12-19 18:36:20,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:20,368 INFO L93 Difference]: Finished difference Result 868 states and 1162 transitions. [2023-12-19 18:36:20,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-19 18:36:20,369 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-12-19 18:36:20,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:20,370 INFO L225 Difference]: With dead ends: 868 [2023-12-19 18:36:20,370 INFO L226 Difference]: Without dead ends: 580 [2023-12-19 18:36:20,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2023-12-19 18:36:20,372 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 268 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:20,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 40 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:36:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-12-19 18:36:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 579. [2023-12-19 18:36:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.2283737024221453) internal successors, (710), 578 states have internal predecessors, (710), 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) [2023-12-19 18:36:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 710 transitions. [2023-12-19 18:36:20,394 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 710 transitions. Word has length 54 [2023-12-19 18:36:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:20,394 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 710 transitions. [2023-12-19 18:36:20,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 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) [2023-12-19 18:36:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 710 transitions. [2023-12-19 18:36:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-19 18:36:20,396 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:20,396 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:20,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 18:36:20,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:20,601 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:20,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:20,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1728882309, now seen corresponding path program 3 times [2023-12-19 18:36:20,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:20,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081876708] [2023-12-19 18:36:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:20,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081876708] [2023-12-19 18:36:21,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081876708] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:36:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683011216] [2023-12-19 18:36:21,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:36:21,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:36:21,296 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) [2023-12-19 18:36:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 18:36:21,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 18:36:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:36:21,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 18:36:21,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:36:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2023-12-19 18:36:21,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:36:21,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683011216] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:36:21,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:36:21,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [33] total 36 [2023-12-19 18:36:21,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539546997] [2023-12-19 18:36:21,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:36:21,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 18:36:21,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:21,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 18:36:21,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=794, Unknown=0, NotChecked=0, Total=1332 [2023-12-19 18:36:21,405 INFO L87 Difference]: Start difference. First operand 579 states and 710 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:21,450 INFO L93 Difference]: Finished difference Result 582 states and 712 transitions. [2023-12-19 18:36:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 18:36:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2023-12-19 18:36:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:21,451 INFO L225 Difference]: With dead ends: 582 [2023-12-19 18:36:21,451 INFO L226 Difference]: Without dead ends: 382 [2023-12-19 18:36:21,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=542, Invalid=864, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 18:36:21,453 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:21,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 25 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:36:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-12-19 18:36:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 381. [2023-12-19 18:36:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.3289473684210527) internal successors, (505), 380 states have internal predecessors, (505), 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) [2023-12-19 18:36:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 505 transitions. [2023-12-19 18:36:21,468 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 505 transitions. Word has length 102 [2023-12-19 18:36:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:21,469 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 505 transitions. [2023-12-19 18:36:21,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:36:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 505 transitions. [2023-12-19 18:36:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-19 18:36:21,470 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:21,470 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:21,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 18:36:21,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-19 18:36:21,675 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:21,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:21,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1902818565, now seen corresponding path program 1 times [2023-12-19 18:36:21,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:21,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698064712] [2023-12-19 18:36:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:21,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:22,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698064712] [2023-12-19 18:36:22,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698064712] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:36:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001026558] [2023-12-19 18:36:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:22,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:22,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:36:22,460 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) [2023-12-19 18:36:22,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 18:36:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:22,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-19 18:36:22,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:36:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:23,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:36:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:24,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001026558] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:36:24,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:36:24,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 96 [2023-12-19 18:36:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420276614] [2023-12-19 18:36:24,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:36:24,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-19 18:36:24,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-19 18:36:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=5213, Unknown=0, NotChecked=0, Total=9312 [2023-12-19 18:36:24,373 INFO L87 Difference]: Start difference. First operand 381 states and 505 transitions. Second operand has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 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) [2023-12-19 18:36:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:25,670 INFO L93 Difference]: Finished difference Result 1144 states and 1648 transitions. [2023-12-19 18:36:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-19 18:36:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2023-12-19 18:36:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:25,673 INFO L225 Difference]: With dead ends: 1144 [2023-12-19 18:36:25,674 INFO L226 Difference]: Without dead ends: 766 [2023-12-19 18:36:25,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5825 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6176, Invalid=10080, Unknown=0, NotChecked=0, Total=16256 [2023-12-19 18:36:25,677 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 544 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:25,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 35 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 18:36:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2023-12-19 18:36:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 765. [2023-12-19 18:36:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 1.331151832460733) internal successors, (1017), 764 states have internal predecessors, (1017), 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) [2023-12-19 18:36:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1017 transitions. [2023-12-19 18:36:25,715 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1017 transitions. Word has length 102 [2023-12-19 18:36:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:25,715 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 1017 transitions. [2023-12-19 18:36:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 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) [2023-12-19 18:36:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1017 transitions. [2023-12-19 18:36:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-12-19 18:36:25,720 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:25,720 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:25,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 18:36:25,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:25,925 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:25,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 838720251, now seen corresponding path program 2 times [2023-12-19 18:36:25,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:25,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833139596] [2023-12-19 18:36:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:25,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:27,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:27,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833139596] [2023-12-19 18:36:27,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833139596] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:36:27,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952347655] [2023-12-19 18:36:27,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:36:27,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:27,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:36:27,857 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) [2023-12-19 18:36:27,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 18:36:27,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:36:27,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:36:27,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 18:36:27,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:36:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2023-12-19 18:36:28,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:36:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2023-12-19 18:36:28,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952347655] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:36:28,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:36:28,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 6, 6] total 74 [2023-12-19 18:36:28,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334452419] [2023-12-19 18:36:28,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:36:28,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-19 18:36:28,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-19 18:36:28,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=3181, Unknown=0, NotChecked=0, Total=5550 [2023-12-19 18:36:28,754 INFO L87 Difference]: Start difference. First operand 765 states and 1017 transitions. Second operand has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 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) [2023-12-19 18:36:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:36,501 INFO L93 Difference]: Finished difference Result 13974 states and 18690 transitions. [2023-12-19 18:36:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-12-19 18:36:36,505 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2023-12-19 18:36:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:36,585 INFO L225 Difference]: With dead ends: 13974 [2023-12-19 18:36:36,585 INFO L226 Difference]: Without dead ends: 13212 [2023-12-19 18:36:36,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20539 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=22797, Invalid=50915, Unknown=0, NotChecked=0, Total=73712 [2023-12-19 18:36:36,606 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1797 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:36,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 48 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 18:36:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13212 states. [2023-12-19 18:36:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13212 to 1243. [2023-12-19 18:36:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 1.3293075684380031) internal successors, (1651), 1242 states have internal predecessors, (1651), 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) [2023-12-19 18:36:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1651 transitions. [2023-12-19 18:36:36,812 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1651 transitions. Word has length 198 [2023-12-19 18:36:36,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:36:36,812 INFO L495 AbstractCegarLoop]: Abstraction has 1243 states and 1651 transitions. [2023-12-19 18:36:36,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 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) [2023-12-19 18:36:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1651 transitions. [2023-12-19 18:36:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-12-19 18:36:36,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:36:36,814 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:36:36,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-19 18:36:37,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:37,019 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:36:37,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:36:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1307050347, now seen corresponding path program 1 times [2023-12-19 18:36:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:36:37,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405945209] [2023-12-19 18:36:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:37,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:36:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:39,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:36:39,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405945209] [2023-12-19 18:36:39,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405945209] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:36:39,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118230882] [2023-12-19 18:36:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:36:39,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:36:39,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:36:39,222 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) [2023-12-19 18:36:39,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 18:36:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:36:39,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-19 18:36:39,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:36:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:40,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:36:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:36:44,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118230882] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:36:44,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:36:44,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 201 [2023-12-19 18:36:44,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727349748] [2023-12-19 18:36:44,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:36:44,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2023-12-19 18:36:44,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:36:44,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2023-12-19 18:36:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17959, Invalid=22643, Unknown=0, NotChecked=0, Total=40602 [2023-12-19 18:36:44,895 INFO L87 Difference]: Start difference. First operand 1243 states and 1651 transitions. Second operand has 202 states, 202 states have (on average 2.99009900990099) internal successors, (604), 201 states have internal predecessors, (604), 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) [2023-12-19 18:36:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:36:59,571 INFO L93 Difference]: Finished difference Result 42300 states and 56654 transitions. [2023-12-19 18:36:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-12-19 18:36:59,572 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 2.99009900990099) internal successors, (604), 201 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2023-12-19 18:36:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:36:59,635 INFO L225 Difference]: With dead ends: 42300 [2023-12-19 18:36:59,635 INFO L226 Difference]: Without dead ends: 41060 [2023-12-19 18:36:59,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26265 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=27001, Invalid=44555, Unknown=0, NotChecked=0, Total=71556 [2023-12-19 18:36:59,647 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 901 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:36:59,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 50 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 18:36:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41060 states. [2023-12-19 18:37:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41060 to 2841. [2023-12-19 18:37:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2840 states have (on average 1.3306338028169014) internal successors, (3779), 2840 states have internal predecessors, (3779), 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) [2023-12-19 18:37:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 3779 transitions. [2023-12-19 18:37:02,567 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 3779 transitions. Word has length 207 [2023-12-19 18:37:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:37:02,568 INFO L495 AbstractCegarLoop]: Abstraction has 2841 states and 3779 transitions. [2023-12-19 18:37:02,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 2.99009900990099) internal successors, (604), 201 states have internal predecessors, (604), 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) [2023-12-19 18:37:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 3779 transitions. [2023-12-19 18:37:02,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2023-12-19 18:37:02,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:37:02,576 INFO L195 NwaCegarLoop]: trace histogram [132, 132, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:37:02,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 18:37:02,777 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,SelfDestructingSolverStorable13 [2023-12-19 18:37:02,777 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:37:02,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:37:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash -481776515, now seen corresponding path program 2 times [2023-12-19 18:37:02,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:37:02,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748710326] [2023-12-19 18:37:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:37:02,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:37:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:37:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 26070 backedges. 0 proven. 26070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:37:10,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:37:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748710326] [2023-12-19 18:37:10,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748710326] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:37:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132204758] [2023-12-19 18:37:10,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:37:10,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:37:10,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:37:10,732 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) [2023-12-19 18:37:10,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 18:37:10,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:37:10,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:37:10,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 135 conjunts are in the unsatisfiable core [2023-12-19 18:37:10,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:37:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26070 backedges. 0 proven. 26070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:37:16,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:37:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 26070 backedges. 0 proven. 26070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:37:29,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132204758] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:37:29,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:37:29,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135, 135] total 402 [2023-12-19 18:37:29,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763979785] [2023-12-19 18:37:29,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:37:29,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 403 states [2023-12-19 18:37:29,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:37:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 403 interpolants. [2023-12-19 18:37:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71827, Invalid=90179, Unknown=0, NotChecked=0, Total=162006 [2023-12-19 18:37:29,578 INFO L87 Difference]: Start difference. First operand 2841 states and 3779 transitions. Second operand has 403 states, 403 states have (on average 2.9950372208436726) internal successors, (1207), 402 states have internal predecessors, (1207), 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) [2023-12-19 18:40:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:40:39,005 INFO L93 Difference]: Finished difference Result 72976 states and 97912 transitions. [2023-12-19 18:40:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2023-12-19 18:40:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 403 states, 403 states have (on average 2.9950372208436726) internal successors, (1207), 402 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2023-12-19 18:40:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:40:39,081 INFO L225 Difference]: With dead ends: 72976 [2023-12-19 18:40:39,081 INFO L226 Difference]: Without dead ends: 70138 [2023-12-19 18:40:39,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 534 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106397 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=107870, Invalid=178890, Unknown=0, NotChecked=0, Total=286760 [2023-12-19 18:40:39,115 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2024 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2024 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:40:39,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2024 Valid, 50 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 18:40:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70138 states. [2023-12-19 18:40:55,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70138 to 6057. [2023-12-19 18:40:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6057 states, 6056 states have (on average 1.3320673712021136) internal successors, (8067), 6056 states have internal predecessors, (8067), 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) [2023-12-19 18:40:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 8067 transitions. [2023-12-19 18:40:55,910 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 8067 transitions. Word has length 408 [2023-12-19 18:40:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:40:55,910 INFO L495 AbstractCegarLoop]: Abstraction has 6057 states and 8067 transitions. [2023-12-19 18:40:55,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 403 states, 403 states have (on average 2.9950372208436726) internal successors, (1207), 402 states have internal predecessors, (1207), 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) [2023-12-19 18:40:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 8067 transitions. [2023-12-19 18:40:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-12-19 18:40:55,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:40:55,925 INFO L195 NwaCegarLoop]: trace histogram [266, 266, 265, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:40:55,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 18:40:56,131 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,SelfDestructingSolverStorable14 [2023-12-19 18:40:56,132 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:40:56,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:40:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash -411080835, now seen corresponding path program 3 times [2023-12-19 18:40:56,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:40:56,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758692760] [2023-12-19 18:40:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:40:56,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:40:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:41:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 0 proven. 106001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:41:31,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:41:31,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758692760] [2023-12-19 18:41:31,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758692760] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:41:31,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520972723] [2023-12-19 18:41:31,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:41:31,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:41:31,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:41:31,788 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) [2023-12-19 18:41:31,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 18:41:31,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 18:41:31,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:41:31,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 18:41:31,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:41:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 796 proven. 0 refuted. 0 times theorem prover too weak. 105205 trivial. 0 not checked. [2023-12-19 18:41:33,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:41:33,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520972723] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:41:33,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:41:33,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [269] total 276 [2023-12-19 18:41:33,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75560999] [2023-12-19 18:41:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:41:33,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 18:41:33,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:41:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 18:41:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36066, Invalid=39834, Unknown=0, NotChecked=0, Total=75900 [2023-12-19 18:41:33,495 INFO L87 Difference]: Start difference. First operand 6057 states and 8067 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:41:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:41:58,362 INFO L93 Difference]: Finished difference Result 9078 states and 12090 transitions. [2023-12-19 18:41:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 18:41:58,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 810 [2023-12-19 18:41:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:41:58,395 INFO L225 Difference]: With dead ends: 9078 [2023-12-19 18:41:58,395 INFO L226 Difference]: Without dead ends: 9076 [2023-12-19 18:41:58,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 804 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=36070, Invalid=40382, Unknown=0, NotChecked=0, Total=76452 [2023-12-19 18:41:58,412 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 18:41:58,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 41 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 18:41:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9076 states. [2023-12-19 18:42:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9076 to 9068. [2023-12-19 18:42:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9068 states, 9067 states have (on average 1.3319730892246608) internal successors, (12077), 9067 states have internal predecessors, (12077), 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) [2023-12-19 18:42:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9068 states to 9068 states and 12077 transitions. [2023-12-19 18:42:22,705 INFO L78 Accepts]: Start accepts. Automaton has 9068 states and 12077 transitions. Word has length 810 [2023-12-19 18:42:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:42:22,706 INFO L495 AbstractCegarLoop]: Abstraction has 9068 states and 12077 transitions. [2023-12-19 18:42:22,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:42:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9068 states and 12077 transitions. [2023-12-19 18:42:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-12-19 18:42:22,730 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:42:22,730 INFO L195 NwaCegarLoop]: trace histogram [266, 266, 201, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:42:22,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 18:42:22,934 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,SelfDestructingSolverStorable15 [2023-12-19 18:42:22,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:42:22,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:42:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash -815986437, now seen corresponding path program 3 times [2023-12-19 18:42:22,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:42:22,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183212030] [2023-12-19 18:42:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:42:22,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:42:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:43:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 0 proven. 106001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:43:04,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:43:04,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183212030] [2023-12-19 18:43:04,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183212030] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:43:04,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154325286] [2023-12-19 18:43:04,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:43:04,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:43:04,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:43:04,766 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) [2023-12-19 18:43:04,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 18:43:04,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 18:43:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:43:04,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 18:43:04,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:43:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 796 proven. 0 refuted. 0 times theorem prover too weak. 105205 trivial. 0 not checked. [2023-12-19 18:43:07,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 18:43:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154325286] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:43:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:43:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [269] total 276 [2023-12-19 18:43:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458216058] [2023-12-19 18:43:07,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:43:07,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 18:43:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:43:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 18:43:07,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36065, Invalid=39835, Unknown=0, NotChecked=0, Total=75900 [2023-12-19 18:43:07,132 INFO L87 Difference]: Start difference. First operand 9068 states and 12077 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:43:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:43:31,995 INFO L93 Difference]: Finished difference Result 9077 states and 12086 transitions. [2023-12-19 18:43:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 18:43:31,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 810 [2023-12-19 18:43:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:43:32,019 INFO L225 Difference]: With dead ends: 9077 [2023-12-19 18:43:32,020 INFO L226 Difference]: Without dead ends: 9075 [2023-12-19 18:43:32,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 804 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=36074, Invalid=40932, Unknown=0, NotChecked=0, Total=77006 [2023-12-19 18:43:32,023 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:43:32,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:43:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2023-12-19 18:43:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 9068. [2023-12-19 18:43:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9068 states, 9067 states have (on average 1.3319730892246608) internal successors, (12077), 9067 states have internal predecessors, (12077), 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) [2023-12-19 18:43:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9068 states to 9068 states and 12077 transitions. [2023-12-19 18:43:56,338 INFO L78 Accepts]: Start accepts. Automaton has 9068 states and 12077 transitions. Word has length 810 [2023-12-19 18:43:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:43:56,338 INFO L495 AbstractCegarLoop]: Abstraction has 9068 states and 12077 transitions. [2023-12-19 18:43:56,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:43:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 9068 states and 12077 transitions. [2023-12-19 18:43:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-12-19 18:43:56,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:43:56,345 INFO L195 NwaCegarLoop]: trace histogram [266, 266, 266, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:43:56,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 18:43:56,546 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,SelfDestructingSolverStorable16 [2023-12-19 18:43:56,546 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:43:56,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:43:56,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1924879611, now seen corresponding path program 1 times [2023-12-19 18:43:56,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:43:56,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851634447] [2023-12-19 18:43:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:43:56,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:43:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:43:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 106001 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 106001 trivial. 0 not checked. [2023-12-19 18:43:56,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:43:56,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851634447] [2023-12-19 18:43:56,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851634447] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 18:43:56,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 18:43:56,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 18:43:56,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628457852] [2023-12-19 18:43:56,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 18:43:56,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 18:43:56,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:43:56,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 18:43:56,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 18:43:56,805 INFO L87 Difference]: Start difference. First operand 9068 states and 12077 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:44:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:44:29,971 INFO L93 Difference]: Finished difference Result 15126 states and 20146 transitions. [2023-12-19 18:44:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 18:44:29,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 810 [2023-12-19 18:44:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:44:29,995 INFO L225 Difference]: With dead ends: 15126 [2023-12-19 18:44:29,995 INFO L226 Difference]: Without dead ends: 12098 [2023-12-19 18:44:29,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-19 18:44:29,999 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 37 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 [2023-12-19 18:44:29,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:44:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12098 states. [2023-12-19 18:45:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12098 to 10480. [2023-12-19 18:45:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10480 states, 10479 states have (on average 1.331997327989312) internal successors, (13958), 10479 states have internal predecessors, (13958), 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) [2023-12-19 18:45:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10480 states to 10480 states and 13958 transitions. [2023-12-19 18:45:03,225 INFO L78 Accepts]: Start accepts. Automaton has 10480 states and 13958 transitions. Word has length 810 [2023-12-19 18:45:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:45:03,226 INFO L495 AbstractCegarLoop]: Abstraction has 10480 states and 13958 transitions. [2023-12-19 18:45:03,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:45:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 10480 states and 13958 transitions. [2023-12-19 18:45:03,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1618 [2023-12-19 18:45:03,247 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:45:03,248 INFO L195 NwaCegarLoop]: trace histogram [532, 532, 530, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:45:03,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-19 18:45:03,248 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:45:03,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:45:03,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1592486992, now seen corresponding path program 1 times [2023-12-19 18:45:03,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:45:03,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285415379] [2023-12-19 18:45:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:45:03,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:45:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:45:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 424810 backedges. 212802 proven. 106001 refuted. 0 times theorem prover too weak. 106007 trivial. 0 not checked. [2023-12-19 18:45:59,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:45:59,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285415379] [2023-12-19 18:45:59,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285415379] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:45:59,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582443496] [2023-12-19 18:45:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:45:59,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:45:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:45:59,917 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) [2023-12-19 18:45:59,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 18:46:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:46:00,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 269 conjunts are in the unsatisfiable core [2023-12-19 18:46:00,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:46:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 424810 backedges. 212802 proven. 106001 refuted. 0 times theorem prover too weak. 106007 trivial. 0 not checked. [2023-12-19 18:46:20,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:47:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 424810 backedges. 212802 proven. 106001 refuted. 0 times theorem prover too weak. 106007 trivial. 0 not checked. [2023-12-19 18:47:20,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582443496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:47:20,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:47:20,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [269, 269, 269] total 804 [2023-12-19 18:47:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401249784] [2023-12-19 18:47:20,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:47:20,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 805 states [2023-12-19 18:47:20,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:47:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 805 interpolants. [2023-12-19 18:47:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287299, Invalid=359921, Unknown=0, NotChecked=0, Total=647220 [2023-12-19 18:47:20,281 INFO L87 Difference]: Start difference. First operand 10480 states and 13958 transitions. Second operand has 805 states, 805 states have (on average 3.0074534161490685) internal successors, (2421), 804 states have internal predecessors, (2421), 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) Received shutdown request... [2023-12-19 18:50:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2023-12-19 18:50:41,196 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 18:50:41,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3501 GetRequests, 2698 SyntacticMatches, 0 SemanticMatches, 803 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286220 ImplicationChecksByTransitivity, 95.6s TimeCoverageRelationStatistics Valid=287299, Invalid=359921, Unknown=0, NotChecked=0, Total=647220 [2023-12-19 18:50:41,211 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2075 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:50:41,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2075 Valid, 15 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 18:50:41,212 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 18:50:41,216 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 18:50:41,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 18:50:41,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:50:41,422 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (10480states) and FLOYD_HOARE automaton (currently 258 states, 805 states before enhancement),while ReachableStatesComputation was computing reachable states (6883 states constructed, input type IntersectNwa). [2023-12-19 18:50:41,425 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 18:50:41,426 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 18:50:41,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 06:50:41 BoogieIcfgContainer [2023-12-19 18:50:41,430 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 18:50:41,431 INFO L158 Benchmark]: Toolchain (without parser) took 865619.78ms. Allocated memory was 215.0MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 179.9MB in the beginning and 973.2MB in the end (delta: -793.3MB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2023-12-19 18:50:41,431 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 215.0MB. Free memory is still 172.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 18:50:41,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 160.35ms. Allocated memory is still 215.0MB. Free memory was 179.5MB in the beginning and 168.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 18:50:41,432 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.78ms. Allocated memory is still 215.0MB. Free memory was 168.5MB in the beginning and 166.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 18:50:41,432 INFO L158 Benchmark]: Boogie Preprocessor took 25.26ms. Allocated memory is still 215.0MB. Free memory was 166.9MB in the beginning and 165.2MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 18:50:41,432 INFO L158 Benchmark]: RCFGBuilder took 234.79ms. Allocated memory is still 215.0MB. Free memory was 165.2MB in the beginning and 154.0MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 18:50:41,432 INFO L158 Benchmark]: TraceAbstraction took 865169.49ms. Allocated memory was 215.0MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 153.3MB in the beginning and 973.2MB in the end (delta: -819.9MB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2023-12-19 18:50:41,435 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 215.0MB. Free memory is still 172.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 160.35ms. Allocated memory is still 215.0MB. Free memory was 179.5MB in the beginning and 168.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.78ms. Allocated memory is still 215.0MB. Free memory was 168.5MB in the beginning and 166.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.26ms. Allocated memory is still 215.0MB. Free memory was 166.9MB in the beginning and 165.2MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 234.79ms. Allocated memory is still 215.0MB. Free memory was 165.2MB in the beginning and 154.0MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 865169.49ms. Allocated memory was 215.0MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 153.3MB in the beginning and 973.2MB in the end (delta: -819.9MB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 12). Cancelled while NwaCegarLoop was constructing difference of abstraction (10480states) and FLOYD_HOARE automaton (currently 258 states, 805 states before enhancement),while ReachableStatesComputation was computing reachable states (6883 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 865.1s, OverallIterations: 19, TraceHistogramMax: 532, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 498.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8205 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8205 mSDsluCounter, 685 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 438 mSDsCounter, 349 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5375 IncrementalHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 349 mSolverCounterUnsat, 247 mSDtfsCounter, 5375 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8686 GetRequests, 5952 SyntacticMatches, 0 SemanticMatches, 2734 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451153 ImplicationChecksByTransitivity, 199.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10480occurred in iteration=18, InterpolantAutomatonStates: 802, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 101.9s AutomataMinimizationTime, 18 MinimizatonAttempts, 116003 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 259.0s InterpolantComputationTime, 9669 NumberOfCodeBlocks, 8001 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 12282 ConstructedInterpolants, 0 QuantifiedInterpolants, 58475 SizeOfPredicates, 42 NumberOfNonLiveVariables, 5852 ConjunctsInSsa, 588 ConjunctsInUnsatCore, 40 InterpolantComputations, 10 PerfectInterpolantSequences, 1286759/1926627 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown