/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/hardness-nfm22/hardness_operatoramount_amount250_file-94.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 13:17:35,261 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 13:17:35,328 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 13:17:35,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 13:17:35,331 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 13:17:35,346 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 13:17:35,347 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 13:17:35,347 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 13:17:35,347 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 13:17:35,347 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 13:17:35,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 13:17:35,348 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 13:17:35,348 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 13:17:35,348 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 13:17:35,349 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 13:17:35,349 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 13:17:35,349 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 13:17:35,349 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 13:17:35,350 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 13:17:35,350 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 13:17:35,350 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 13:17:35,353 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 13:17:35,354 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 13:17:35,354 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 13:17:35,357 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 13:17:35,357 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 13:17:35,357 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 13:17:35,358 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 13:17:35,358 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 13:17:35,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 13:17:35,359 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 13:17:35,359 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 13:17:35,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 13:17:35,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 13:17:35,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 13:17:35,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 13:17:35,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 13:17:35,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 13:17:35,360 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 13:17:35,360 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 13:17:35,360 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 13:17:35,360 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 13:17:35,360 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 13:17:35,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 13:17:35,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 13:17:35,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 13:17:35,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 13:17:35,556 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 13:17:35,558 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 13:17:35,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount250_file-94.i [2023-12-19 13:17:36,603 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 13:17:36,880 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 13:17:36,880 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount250_file-94.i [2023-12-19 13:17:36,894 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e9db04c9/6f79c2432ab14d05be8f868fb2d1358b/FLAGd78328708 [2023-12-19 13:17:36,920 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e9db04c9/6f79c2432ab14d05be8f868fb2d1358b [2023-12-19 13:17:36,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 13:17:36,924 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 13:17:36,926 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 13:17:36,927 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 13:17:36,930 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 13:17:36,931 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 01:17:36" (1/1) ... [2023-12-19 13:17:36,932 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aaed017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:36, skipping insertion in model container [2023-12-19 13:17:36,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 01:17:36" (1/1) ... [2023-12-19 13:17:36,987 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 13:17:37,116 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount250_file-94.i[916,929] [2023-12-19 13:17:37,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 13:17:37,247 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 13:17:37,254 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount250_file-94.i[916,929] [2023-12-19 13:17:37,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 13:17:37,329 INFO L206 MainTranslator]: Completed translation [2023-12-19 13:17:37,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37 WrapperNode [2023-12-19 13:17:37,330 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 13:17:37,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 13:17:37,331 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 13:17:37,331 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 13:17:37,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,349 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,404 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 504 [2023-12-19 13:17:37,405 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 13:17:37,405 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 13:17:37,405 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 13:17:37,406 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 13:17:37,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,418 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,441 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 13:17:37,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,442 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,461 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 13:17:37,472 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 13:17:37,472 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 13:17:37,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 13:17:37,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (1/1) ... [2023-12-19 13:17:37,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 13:17:37,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:37,508 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 13:17:37,515 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 13:17:37,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 13:17:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 13:17:37,531 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 13:17:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 13:17:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 13:17:37,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 13:17:37,653 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 13:17:37,655 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 13:17:38,206 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 13:17:38,239 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 13:17:38,239 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 13:17:38,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 01:17:38 BoogieIcfgContainer [2023-12-19 13:17:38,239 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 13:17:38,241 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 13:17:38,241 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 13:17:38,243 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 13:17:38,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 01:17:36" (1/3) ... [2023-12-19 13:17:38,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc53ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 01:17:38, skipping insertion in model container [2023-12-19 13:17:38,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 01:17:37" (2/3) ... [2023-12-19 13:17:38,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc53ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 01:17:38, skipping insertion in model container [2023-12-19 13:17:38,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 01:17:38" (3/3) ... [2023-12-19 13:17:38,245 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-94.i [2023-12-19 13:17:38,255 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 13:17:38,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 13:17:38,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 13:17:38,306 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;@5f89f063, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 13:17:38,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 13:17:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 130 states have (on average 1.5923076923076922) internal successors, (207), 131 states have internal predecessors, (207), 39 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-19 13:17:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-12-19 13:17:38,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:38,334 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:38,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:38,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1868492597, now seen corresponding path program 1 times [2023-12-19 13:17:38,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:38,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901583774] [2023-12-19 13:17:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:38,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:38,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:38,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901583774] [2023-12-19 13:17:38,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 13:17:38,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167562954] [2023-12-19 13:17:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:38,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:38,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:38,553 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 13:17:38,578 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 13:17:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:38,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 13:17:38,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2023-12-19 13:17:38,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:17:38,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167562954] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:17:38,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:17:38,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 13:17:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770099799] [2023-12-19 13:17:38,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:17:38,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 13:17:38,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:38,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 13:17:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 13:17:38,853 INFO L87 Difference]: Start difference. First operand has 172 states, 130 states have (on average 1.5923076923076922) internal successors, (207), 131 states have internal predecessors, (207), 39 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 2 states have call successors, (39) [2023-12-19 13:17:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:38,890 INFO L93 Difference]: Finished difference Result 341 states and 607 transitions. [2023-12-19 13:17:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 13:17:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 2 states have call successors, (39) Word has length 271 [2023-12-19 13:17:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:38,897 INFO L225 Difference]: With dead ends: 341 [2023-12-19 13:17:38,897 INFO L226 Difference]: Without dead ends: 170 [2023-12-19 13:17:38,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 270 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 13:17:38,903 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:38,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 277 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 13:17:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-19 13:17:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-12-19 13:17:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 129 states have (on average 1.565891472868217) internal successors, (202), 129 states have internal predecessors, (202), 39 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-19 13:17:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 280 transitions. [2023-12-19 13:17:38,942 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 280 transitions. Word has length 271 [2023-12-19 13:17:38,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:38,942 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 280 transitions. [2023-12-19 13:17:38,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 2 states have call successors, (39) [2023-12-19 13:17:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 280 transitions. [2023-12-19 13:17:38,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-12-19 13:17:38,946 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:38,950 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:38,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 13:17:39,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 13:17:39,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:39,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:39,159 INFO L85 PathProgramCache]: Analyzing trace with hash -301388455, now seen corresponding path program 1 times [2023-12-19 13:17:39,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:39,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936064314] [2023-12-19 13:17:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:39,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:39,241 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:39,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181701223] [2023-12-19 13:17:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:39,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:39,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:39,242 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 13:17:39,280 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 13:17:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:39,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 13:17:39,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-12-19 13:17:39,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:17:39,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:39,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936064314] [2023-12-19 13:17:39,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:39,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181701223] [2023-12-19 13:17:39,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181701223] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:17:39,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:17:39,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 13:17:39,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364248107] [2023-12-19 13:17:39,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:17:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 13:17:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 13:17:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-19 13:17:39,809 INFO L87 Difference]: Start difference. First operand 170 states and 280 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:40,651 INFO L93 Difference]: Finished difference Result 832 states and 1375 transitions. [2023-12-19 13:17:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 13:17:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 271 [2023-12-19 13:17:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:40,656 INFO L225 Difference]: With dead ends: 832 [2023-12-19 13:17:40,656 INFO L226 Difference]: Without dead ends: 663 [2023-12-19 13:17:40,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-12-19 13:17:40,658 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 641 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 2381 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:40,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 2381 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 13:17:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-12-19 13:17:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 410. [2023-12-19 13:17:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 329 states have (on average 1.5927051671732524) internal successors, (524), 329 states have internal predecessors, (524), 78 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 13:17:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 680 transitions. [2023-12-19 13:17:40,695 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 680 transitions. Word has length 271 [2023-12-19 13:17:40,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:40,695 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 680 transitions. [2023-12-19 13:17:40,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 680 transitions. [2023-12-19 13:17:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-12-19 13:17:40,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:40,698 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:40,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 13:17:40,904 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,SelfDestructingSolverStorable1 [2023-12-19 13:17:40,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:40,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1687591849, now seen corresponding path program 1 times [2023-12-19 13:17:40,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:40,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747898791] [2023-12-19 13:17:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:40,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:40,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016830235] [2023-12-19 13:17:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:40,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:40,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:40,985 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 13:17:41,000 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 13:17:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:41,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 13:17:41,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-12-19 13:17:41,470 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:17:41,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:41,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747898791] [2023-12-19 13:17:41,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:41,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016830235] [2023-12-19 13:17:41,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016830235] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:17:41,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:17:41,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 13:17:41,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697645562] [2023-12-19 13:17:41,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:17:41,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 13:17:41,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 13:17:41,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-19 13:17:41,473 INFO L87 Difference]: Start difference. First operand 410 states and 680 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:42,201 INFO L93 Difference]: Finished difference Result 1085 states and 1792 transitions. [2023-12-19 13:17:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 13:17:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 271 [2023-12-19 13:17:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:42,205 INFO L225 Difference]: With dead ends: 1085 [2023-12-19 13:17:42,205 INFO L226 Difference]: Without dead ends: 676 [2023-12-19 13:17:42,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-12-19 13:17:42,207 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 820 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:42,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 1902 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 13:17:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2023-12-19 13:17:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 408. [2023-12-19 13:17:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 327 states have (on average 1.5932721712538227) internal successors, (521), 327 states have internal predecessors, (521), 78 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 13:17:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 677 transitions. [2023-12-19 13:17:42,236 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 677 transitions. Word has length 271 [2023-12-19 13:17:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:42,237 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 677 transitions. [2023-12-19 13:17:42,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 7 states have internal predecessors, (79), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 677 transitions. [2023-12-19 13:17:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-12-19 13:17:42,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:42,240 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:42,258 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 13:17:42,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:42,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:42,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:42,447 INFO L85 PathProgramCache]: Analyzing trace with hash 988854075, now seen corresponding path program 1 times [2023-12-19 13:17:42,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:42,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80950675] [2023-12-19 13:17:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:42,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:42,493 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:42,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105903023] [2023-12-19 13:17:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:42,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:42,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:42,498 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 13:17:42,537 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 13:17:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:42,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 13:17:42,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-12-19 13:17:42,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:17:42,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:42,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80950675] [2023-12-19 13:17:42,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:42,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105903023] [2023-12-19 13:17:42,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105903023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:17:42,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:17:42,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 13:17:42,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976821359] [2023-12-19 13:17:42,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:17:42,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 13:17:42,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 13:17:42,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 13:17:42,735 INFO L87 Difference]: Start difference. First operand 408 states and 677 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:42,893 INFO L93 Difference]: Finished difference Result 1136 states and 1887 transitions. [2023-12-19 13:17:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 13:17:42,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 272 [2023-12-19 13:17:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:42,897 INFO L225 Difference]: With dead ends: 1136 [2023-12-19 13:17:42,897 INFO L226 Difference]: Without dead ends: 729 [2023-12-19 13:17:42,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 13:17:42,899 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 408 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:42,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 585 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 13:17:42,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-12-19 13:17:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 725. [2023-12-19 13:17:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 606 states have (on average 1.608910891089109) internal successors, (975), 608 states have internal predecessors, (975), 114 states have call successors, (114), 4 states have call predecessors, (114), 4 states have return successors, (114), 112 states have call predecessors, (114), 114 states have call successors, (114) [2023-12-19 13:17:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1203 transitions. [2023-12-19 13:17:42,939 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1203 transitions. Word has length 272 [2023-12-19 13:17:42,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:42,940 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1203 transitions. [2023-12-19 13:17:42,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1203 transitions. [2023-12-19 13:17:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-12-19 13:17:42,942 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:42,942 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:42,955 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 13:17:43,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:43,149 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:43,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:43,150 INFO L85 PathProgramCache]: Analyzing trace with hash -651580507, now seen corresponding path program 1 times [2023-12-19 13:17:43,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:43,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745048032] [2023-12-19 13:17:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:43,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:43,175 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:43,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726596878] [2023-12-19 13:17:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:43,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:43,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:43,191 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 13:17:43,217 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 13:17:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:43,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 13:17:43,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-12-19 13:17:43,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:17:43,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745048032] [2023-12-19 13:17:43,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726596878] [2023-12-19 13:17:43,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726596878] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:17:43,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:17:43,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 13:17:43,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515209405] [2023-12-19 13:17:43,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:17:43,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 13:17:43,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 13:17:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 13:17:43,381 INFO L87 Difference]: Start difference. First operand 725 states and 1203 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:43,448 INFO L93 Difference]: Finished difference Result 2111 states and 3507 transitions. [2023-12-19 13:17:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 13:17:43,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 272 [2023-12-19 13:17:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:43,454 INFO L225 Difference]: With dead ends: 2111 [2023-12-19 13:17:43,454 INFO L226 Difference]: Without dead ends: 1387 [2023-12-19 13:17:43,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 13:17:43,456 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 331 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:43,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 989 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 13:17:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2023-12-19 13:17:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 737. [2023-12-19 13:17:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 618 states have (on average 1.5970873786407767) internal successors, (987), 620 states have internal predecessors, (987), 114 states have call successors, (114), 4 states have call predecessors, (114), 4 states have return successors, (114), 112 states have call predecessors, (114), 114 states have call successors, (114) [2023-12-19 13:17:43,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1215 transitions. [2023-12-19 13:17:43,516 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1215 transitions. Word has length 272 [2023-12-19 13:17:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:43,517 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1215 transitions. [2023-12-19 13:17:43,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1215 transitions. [2023-12-19 13:17:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-12-19 13:17:43,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:43,519 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:43,556 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 13:17:43,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:43,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:43,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1045947293, now seen corresponding path program 1 times [2023-12-19 13:17:43,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:43,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069110809] [2023-12-19 13:17:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:43,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:43,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192169811] [2023-12-19 13:17:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:43,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:43,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:43,784 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 13:17:43,836 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 13:17:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:44,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 13:17:44,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-12-19 13:17:44,292 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:17:44,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:44,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069110809] [2023-12-19 13:17:44,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:44,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192169811] [2023-12-19 13:17:44,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192169811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:17:44,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:17:44,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-19 13:17:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060248624] [2023-12-19 13:17:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:17:44,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-19 13:17:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-19 13:17:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-19 13:17:44,295 INFO L87 Difference]: Start difference. First operand 737 states and 1215 transitions. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:45,018 INFO L93 Difference]: Finished difference Result 3903 states and 6479 transitions. [2023-12-19 13:17:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-19 13:17:45,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 272 [2023-12-19 13:17:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:45,029 INFO L225 Difference]: With dead ends: 3903 [2023-12-19 13:17:45,029 INFO L226 Difference]: Without dead ends: 3605 [2023-12-19 13:17:45,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2023-12-19 13:17:45,030 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 2613 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2613 SdHoareTripleChecker+Valid, 2810 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:45,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2613 Valid, 2810 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 13:17:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2023-12-19 13:17:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2163. [2023-12-19 13:17:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 1817 states have (on average 1.5987892129884425) internal successors, (2905), 1825 states have internal predecessors, (2905), 331 states have call successors, (331), 14 states have call predecessors, (331), 14 states have return successors, (331), 323 states have call predecessors, (331), 331 states have call successors, (331) [2023-12-19 13:17:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3567 transitions. [2023-12-19 13:17:45,132 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3567 transitions. Word has length 272 [2023-12-19 13:17:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:45,132 INFO L495 AbstractCegarLoop]: Abstraction has 2163 states and 3567 transitions. [2023-12-19 13:17:45,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 10 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3567 transitions. [2023-12-19 13:17:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-12-19 13:17:45,136 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:45,137 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:45,145 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 13:17:45,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:45,346 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:45,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1179960799, now seen corresponding path program 1 times [2023-12-19 13:17:45,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:45,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894954813] [2023-12-19 13:17:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:45,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:45,387 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:45,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170828647] [2023-12-19 13:17:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:45,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:45,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:45,408 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 13:17:45,456 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 13:17:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:45,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 13:17:45,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-12-19 13:17:45,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:17:45,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:45,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894954813] [2023-12-19 13:17:45,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:45,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170828647] [2023-12-19 13:17:45,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170828647] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:17:45,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:17:45,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-19 13:17:45,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945392530] [2023-12-19 13:17:45,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:17:45,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 13:17:45,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:45,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 13:17:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 13:17:45,683 INFO L87 Difference]: Start difference. First operand 2163 states and 3567 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:46,015 INFO L93 Difference]: Finished difference Result 4273 states and 7036 transitions. [2023-12-19 13:17:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 13:17:46,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 272 [2023-12-19 13:17:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:46,023 INFO L225 Difference]: With dead ends: 4273 [2023-12-19 13:17:46,023 INFO L226 Difference]: Without dead ends: 2201 [2023-12-19 13:17:46,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-19 13:17:46,032 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 426 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:46,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1148 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 13:17:46,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2023-12-19 13:17:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2199. [2023-12-19 13:17:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 1847 states have (on average 1.589063345966432) internal successors, (2935), 1855 states have internal predecessors, (2935), 331 states have call successors, (331), 20 states have call predecessors, (331), 20 states have return successors, (331), 323 states have call predecessors, (331), 331 states have call successors, (331) [2023-12-19 13:17:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3597 transitions. [2023-12-19 13:17:46,118 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3597 transitions. Word has length 272 [2023-12-19 13:17:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:46,119 INFO L495 AbstractCegarLoop]: Abstraction has 2199 states and 3597 transitions. [2023-12-19 13:17:46,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3597 transitions. [2023-12-19 13:17:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-12-19 13:17:46,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:46,123 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:46,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 13:17:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:46,329 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:46,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash -552244438, now seen corresponding path program 1 times [2023-12-19 13:17:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:46,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024065352] [2023-12-19 13:17:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:46,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:46,355 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334833396] [2023-12-19 13:17:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:46,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:46,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:46,374 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 13:17:46,394 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 13:17:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:46,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 13:17:46,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1478 proven. 66 refuted. 0 times theorem prover too weak. 1420 trivial. 0 not checked. [2023-12-19 13:17:46,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:17:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 48 proven. 66 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-12-19 13:17:46,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:46,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024065352] [2023-12-19 13:17:46,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:46,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334833396] [2023-12-19 13:17:46,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334833396] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:17:46,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:17:46,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-19 13:17:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009293057] [2023-12-19 13:17:46,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:17:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 13:17:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:46,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 13:17:46,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-19 13:17:46,964 INFO L87 Difference]: Start difference. First operand 2199 states and 3597 transitions. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-12-19 13:17:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:47,309 INFO L93 Difference]: Finished difference Result 3757 states and 6099 transitions. [2023-12-19 13:17:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 13:17:47,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) Word has length 273 [2023-12-19 13:17:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:47,314 INFO L225 Difference]: With dead ends: 3757 [2023-12-19 13:17:47,314 INFO L226 Difference]: Without dead ends: 1649 [2023-12-19 13:17:47,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-12-19 13:17:47,316 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 503 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:47,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 658 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 13:17:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2023-12-19 13:17:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 839. [2023-12-19 13:17:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 672 states have (on average 1.5431547619047619) internal successors, (1037), 675 states have internal predecessors, (1037), 153 states have call successors, (153), 13 states have call predecessors, (153), 13 states have return successors, (153), 150 states have call predecessors, (153), 153 states have call successors, (153) [2023-12-19 13:17:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1343 transitions. [2023-12-19 13:17:47,364 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1343 transitions. Word has length 273 [2023-12-19 13:17:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:47,364 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1343 transitions. [2023-12-19 13:17:47,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 3 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-12-19 13:17:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1343 transitions. [2023-12-19 13:17:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-12-19 13:17:47,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:47,367 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:47,372 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 13:17:47,572 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,SelfDestructingSolverStorable7 [2023-12-19 13:17:47,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:47,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2064600346, now seen corresponding path program 1 times [2023-12-19 13:17:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:47,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975398449] [2023-12-19 13:17:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:47,611 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:47,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806076671] [2023-12-19 13:17:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:47,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:47,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:47,613 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 13:17:47,637 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 13:17:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:47,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 13:17:47,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 398 proven. 6 refuted. 0 times theorem prover too weak. 2560 trivial. 0 not checked. [2023-12-19 13:17:47,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:17:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-12-19 13:17:47,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975398449] [2023-12-19 13:17:47,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806076671] [2023-12-19 13:17:47,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806076671] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:17:47,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:17:47,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 13:17:47,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437633827] [2023-12-19 13:17:47,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:17:47,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 13:17:47,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 13:17:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 13:17:47,962 INFO L87 Difference]: Start difference. First operand 839 states and 1343 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 2 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-12-19 13:17:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:48,187 INFO L93 Difference]: Finished difference Result 1637 states and 2606 transitions. [2023-12-19 13:17:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 13:17:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 2 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 273 [2023-12-19 13:17:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:48,191 INFO L225 Difference]: With dead ends: 1637 [2023-12-19 13:17:48,191 INFO L226 Difference]: Without dead ends: 873 [2023-12-19 13:17:48,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-19 13:17:48,193 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 399 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:48,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 615 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 13:17:48,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-12-19 13:17:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 851. [2023-12-19 13:17:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 681 states have (on average 1.5301027900146842) internal successors, (1042), 684 states have internal predecessors, (1042), 153 states have call successors, (153), 16 states have call predecessors, (153), 16 states have return successors, (153), 150 states have call predecessors, (153), 153 states have call successors, (153) [2023-12-19 13:17:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1348 transitions. [2023-12-19 13:17:48,237 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1348 transitions. Word has length 273 [2023-12-19 13:17:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:48,237 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1348 transitions. [2023-12-19 13:17:48,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 2 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2023-12-19 13:17:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1348 transitions. [2023-12-19 13:17:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-12-19 13:17:48,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:48,241 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:48,247 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 13:17:48,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:48,448 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:48,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 384999784, now seen corresponding path program 1 times [2023-12-19 13:17:48,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:48,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271801457] [2023-12-19 13:17:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:48,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:48,473 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:48,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368070548] [2023-12-19 13:17:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:48,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:48,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:48,474 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 13:17:48,502 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 13:17:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:48,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 13:17:48,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-12-19 13:17:49,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:17:49,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:49,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271801457] [2023-12-19 13:17:49,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:49,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368070548] [2023-12-19 13:17:49,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368070548] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:17:49,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:17:49,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 13:17:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515340925] [2023-12-19 13:17:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:17:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 13:17:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:49,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 13:17:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-19 13:17:49,509 INFO L87 Difference]: Start difference. First operand 851 states and 1348 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:49,802 INFO L93 Difference]: Finished difference Result 2093 states and 3364 transitions. [2023-12-19 13:17:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 13:17:49,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 273 [2023-12-19 13:17:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:49,806 INFO L225 Difference]: With dead ends: 2093 [2023-12-19 13:17:49,807 INFO L226 Difference]: Without dead ends: 1321 [2023-12-19 13:17:49,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-19 13:17:49,808 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 495 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:49,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1208 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 13:17:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2023-12-19 13:17:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 865. [2023-12-19 13:17:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 695 states have (on average 1.5294964028776978) internal successors, (1063), 697 states have internal predecessors, (1063), 153 states have call successors, (153), 16 states have call predecessors, (153), 16 states have return successors, (153), 151 states have call predecessors, (153), 153 states have call successors, (153) [2023-12-19 13:17:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1369 transitions. [2023-12-19 13:17:49,850 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1369 transitions. Word has length 273 [2023-12-19 13:17:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:49,851 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1369 transitions. [2023-12-19 13:17:49,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:17:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1369 transitions. [2023-12-19 13:17:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-12-19 13:17:49,852 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:49,852 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:49,859 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 13:17:50,058 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,SelfDestructingSolverStorable9 [2023-12-19 13:17:50,060 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:50,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash 31911402, now seen corresponding path program 1 times [2023-12-19 13:17:50,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:50,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696668513] [2023-12-19 13:17:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:50,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:50,083 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:50,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455751542] [2023-12-19 13:17:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:50,084 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 13:17:50,109 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 13:17:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:50,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 13:17:50,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1400 proven. 78 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2023-12-19 13:17:51,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:17:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-12-19 13:17:51,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:51,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696668513] [2023-12-19 13:17:51,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:51,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455751542] [2023-12-19 13:17:51,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455751542] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:17:51,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:17:51,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-12-19 13:17:51,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157416141] [2023-12-19 13:17:51,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:17:51,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 13:17:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 13:17:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-12-19 13:17:51,643 INFO L87 Difference]: Start difference. First operand 865 states and 1369 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 24 states have internal predecessors, (152), 6 states have call successors, (78), 4 states have call predecessors, (78), 6 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-12-19 13:17:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:57,574 INFO L93 Difference]: Finished difference Result 7120 states and 11242 transitions. [2023-12-19 13:17:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-12-19 13:17:57,574 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 24 states have internal predecessors, (152), 6 states have call successors, (78), 4 states have call predecessors, (78), 6 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) Word has length 273 [2023-12-19 13:17:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:57,595 INFO L225 Difference]: With dead ends: 7120 [2023-12-19 13:17:57,595 INFO L226 Difference]: Without dead ends: 6348 [2023-12-19 13:17:57,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6635 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3347, Invalid=13165, Unknown=0, NotChecked=0, Total=16512 [2023-12-19 13:17:57,601 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 7927 mSDsluCounter, 4099 mSDsCounter, 0 mSdLazyCounter, 4887 mSolverCounterSat, 1636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7941 SdHoareTripleChecker+Valid, 4391 SdHoareTripleChecker+Invalid, 6523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1636 IncrementalHoareTripleChecker+Valid, 4887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:57,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7941 Valid, 4391 Invalid, 6523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1636 Valid, 4887 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-19 13:17:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2023-12-19 13:17:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 4339. [2023-12-19 13:17:57,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 3773 states have (on average 1.5809700503578055) internal successors, (5965), 3787 states have internal predecessors, (5965), 498 states have call successors, (498), 67 states have call predecessors, (498), 67 states have return successors, (498), 484 states have call predecessors, (498), 498 states have call successors, (498) [2023-12-19 13:17:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 6961 transitions. [2023-12-19 13:17:57,814 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 6961 transitions. Word has length 273 [2023-12-19 13:17:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:57,814 INFO L495 AbstractCegarLoop]: Abstraction has 4339 states and 6961 transitions. [2023-12-19 13:17:57,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 24 states have internal predecessors, (152), 6 states have call successors, (78), 4 states have call predecessors, (78), 6 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-12-19 13:17:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 6961 transitions. [2023-12-19 13:17:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-12-19 13:17:57,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:57,816 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:57,831 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 13:17:58,022 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,SelfDestructingSolverStorable10 [2023-12-19 13:17:58,022 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:58,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:58,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1773526932, now seen corresponding path program 1 times [2023-12-19 13:17:58,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:58,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978758233] [2023-12-19 13:17:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:58,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:58,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:58,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835533188] [2023-12-19 13:17:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:58,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:58,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:58,051 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 13:17:58,075 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 13:17:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:58,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 13:17:58,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1730 proven. 78 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2023-12-19 13:17:58,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:17:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-12-19 13:17:58,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:58,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978758233] [2023-12-19 13:17:58,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:58,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835533188] [2023-12-19 13:17:58,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835533188] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:17:58,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:17:58,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-19 13:17:58,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727011774] [2023-12-19 13:17:58,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:17:58,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 13:17:58,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:58,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 13:17:58,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-12-19 13:17:58,739 INFO L87 Difference]: Start difference. First operand 4339 states and 6961 transitions. Second operand has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 5 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (66), 5 states have call predecessors, (66), 5 states have call successors, (66) [2023-12-19 13:17:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:17:59,158 INFO L93 Difference]: Finished difference Result 5916 states and 9480 transitions. [2023-12-19 13:17:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 13:17:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 5 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (66), 5 states have call predecessors, (66), 5 states have call successors, (66) Word has length 273 [2023-12-19 13:17:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:17:59,163 INFO L225 Difference]: With dead ends: 5916 [2023-12-19 13:17:59,163 INFO L226 Difference]: Without dead ends: 1678 [2023-12-19 13:17:59,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2023-12-19 13:17:59,171 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 768 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 13:17:59,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 555 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 13:17:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2023-12-19 13:17:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1638. [2023-12-19 13:17:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1372 states have (on average 1.564139941690962) internal successors, (2146), 1376 states have internal predecessors, (2146), 235 states have call successors, (235), 30 states have call predecessors, (235), 30 states have return successors, (235), 231 states have call predecessors, (235), 235 states have call successors, (235) [2023-12-19 13:17:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2616 transitions. [2023-12-19 13:17:59,255 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2616 transitions. Word has length 273 [2023-12-19 13:17:59,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:17:59,255 INFO L495 AbstractCegarLoop]: Abstraction has 1638 states and 2616 transitions. [2023-12-19 13:17:59,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 5 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (66), 5 states have call predecessors, (66), 5 states have call successors, (66) [2023-12-19 13:17:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2616 transitions. [2023-12-19 13:17:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-12-19 13:17:59,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:17:59,257 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:17:59,265 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 13:17:59,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 13:17:59,465 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:17:59,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:17:59,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1240135188, now seen corresponding path program 1 times [2023-12-19 13:17:59,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:17:59,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384894998] [2023-12-19 13:17:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:59,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:17:59,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:17:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81279037] [2023-12-19 13:17:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:17:59,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:17:59,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:17:59,493 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 13:17:59,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 13:17:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:17:59,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-19 13:17:59,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:17:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-12-19 13:17:59,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:17:59,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:17:59,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384894998] [2023-12-19 13:17:59,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:17:59,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81279037] [2023-12-19 13:17:59,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81279037] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:17:59,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:17:59,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 13:17:59,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889714413] [2023-12-19 13:17:59,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:17:59,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 13:17:59,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:17:59,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 13:17:59,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 13:17:59,967 INFO L87 Difference]: Start difference. First operand 1638 states and 2616 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:18:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:18:00,319 INFO L93 Difference]: Finished difference Result 6495 states and 10437 transitions. [2023-12-19 13:18:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 13:18:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 273 [2023-12-19 13:18:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:18:00,343 INFO L225 Difference]: With dead ends: 6495 [2023-12-19 13:18:00,343 INFO L226 Difference]: Without dead ends: 4962 [2023-12-19 13:18:00,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 13:18:00,347 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 833 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 13:18:00,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 1215 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 13:18:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2023-12-19 13:18:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3483. [2023-12-19 13:18:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2989 states have (on average 1.5690866510538641) internal successors, (4690), 2997 states have internal predecessors, (4690), 435 states have call successors, (435), 58 states have call predecessors, (435), 58 states have return successors, (435), 427 states have call predecessors, (435), 435 states have call successors, (435) [2023-12-19 13:18:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5560 transitions. [2023-12-19 13:18:00,565 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5560 transitions. Word has length 273 [2023-12-19 13:18:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:18:00,566 INFO L495 AbstractCegarLoop]: Abstraction has 3483 states and 5560 transitions. [2023-12-19 13:18:00,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:18:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5560 transitions. [2023-12-19 13:18:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-12-19 13:18:00,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:18:00,567 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:18:00,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 13:18:00,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 13:18:00,774 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:18:00,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:18:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1414397526, now seen corresponding path program 1 times [2023-12-19 13:18:00,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:18:00,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665851096] [2023-12-19 13:18:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:00,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:18:00,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:18:00,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138785846] [2023-12-19 13:18:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:00,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:18:00,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:18:00,796 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 13:18:00,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 13:18:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:18:00,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 13:18:01,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:18:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1679 proven. 57 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2023-12-19 13:18:01,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:18:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 165 proven. 60 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2023-12-19 13:18:01,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:18:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665851096] [2023-12-19 13:18:01,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:18:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138785846] [2023-12-19 13:18:01,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138785846] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:18:01,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:18:01,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-19 13:18:01,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429509845] [2023-12-19 13:18:01,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:18:01,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 13:18:01,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:18:01,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 13:18:01,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-12-19 13:18:01,749 INFO L87 Difference]: Start difference. First operand 3483 states and 5560 transitions. Second operand has 23 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-12-19 13:18:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:18:04,314 INFO L93 Difference]: Finished difference Result 24744 states and 39945 transitions. [2023-12-19 13:18:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-19 13:18:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) Word has length 273 [2023-12-19 13:18:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:18:04,347 INFO L225 Difference]: With dead ends: 24744 [2023-12-19 13:18:04,348 INFO L226 Difference]: Without dead ends: 21360 [2023-12-19 13:18:04,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=870, Invalid=2436, Unknown=0, NotChecked=0, Total=3306 [2023-12-19 13:18:04,357 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 6789 mSDsluCounter, 2919 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 1505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6837 SdHoareTripleChecker+Valid, 3140 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1505 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 13:18:04,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6837 Valid, 3140 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1505 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 13:18:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21360 states. [2023-12-19 13:18:04,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21360 to 10300. [2023-12-19 13:18:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10300 states, 9020 states have (on average 1.5633037694013303) internal successors, (14101), 9052 states have internal predecessors, (14101), 1099 states have call successors, (1099), 180 states have call predecessors, (1099), 180 states have return successors, (1099), 1067 states have call predecessors, (1099), 1099 states have call successors, (1099) [2023-12-19 13:18:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10300 states to 10300 states and 16299 transitions. [2023-12-19 13:18:04,955 INFO L78 Accepts]: Start accepts. Automaton has 10300 states and 16299 transitions. Word has length 273 [2023-12-19 13:18:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:18:04,956 INFO L495 AbstractCegarLoop]: Abstraction has 10300 states and 16299 transitions. [2023-12-19 13:18:04,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.391304347826087) internal successors, (147), 23 states have internal predecessors, (147), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-12-19 13:18:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10300 states and 16299 transitions. [2023-12-19 13:18:04,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 13:18:04,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:18:04,958 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:18:04,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 13:18:05,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:18:05,175 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:18:05,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:18:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash 970948287, now seen corresponding path program 1 times [2023-12-19 13:18:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:18:05,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358657142] [2023-12-19 13:18:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:05,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:18:05,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:18:05,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146627084] [2023-12-19 13:18:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:05,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:18:05,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:18:05,200 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 13:18:05,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 13:18:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:18:05,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-19 13:18:05,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:18:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-12-19 13:18:06,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 13:18:06,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:18:06,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358657142] [2023-12-19 13:18:06,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:18:06,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146627084] [2023-12-19 13:18:06,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146627084] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 13:18:06,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 13:18:06,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-19 13:18:06,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993401686] [2023-12-19 13:18:06,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 13:18:06,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-19 13:18:06,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:18:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-19 13:18:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-19 13:18:06,350 INFO L87 Difference]: Start difference. First operand 10300 states and 16299 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:18:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:18:08,716 INFO L93 Difference]: Finished difference Result 51931 states and 83639 transitions. [2023-12-19 13:18:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-19 13:18:08,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 274 [2023-12-19 13:18:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:18:08,780 INFO L225 Difference]: With dead ends: 51931 [2023-12-19 13:18:08,780 INFO L226 Difference]: Without dead ends: 41757 [2023-12-19 13:18:08,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 13:18:08,805 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 2571 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2571 SdHoareTripleChecker+Valid, 5047 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 13:18:08,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2571 Valid, 5047 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 13:18:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41757 states. [2023-12-19 13:18:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41757 to 22367. [2023-12-19 13:18:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22367 states, 20098 states have (on average 1.6030948353069958) internal successors, (32219), 20178 states have internal predecessors, (32219), 1945 states have call successors, (1945), 323 states have call predecessors, (1945), 323 states have return successors, (1945), 1865 states have call predecessors, (1945), 1945 states have call successors, (1945) [2023-12-19 13:18:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22367 states to 22367 states and 36109 transitions. [2023-12-19 13:18:09,963 INFO L78 Accepts]: Start accepts. Automaton has 22367 states and 36109 transitions. Word has length 274 [2023-12-19 13:18:09,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:18:09,963 INFO L495 AbstractCegarLoop]: Abstraction has 22367 states and 36109 transitions. [2023-12-19 13:18:09,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-12-19 13:18:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 22367 states and 36109 transitions. [2023-12-19 13:18:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 13:18:09,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:18:09,969 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:18:09,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 13:18:10,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 13:18:10,194 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:18:10,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:18:10,194 INFO L85 PathProgramCache]: Analyzing trace with hash -812729850, now seen corresponding path program 1 times [2023-12-19 13:18:10,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:18:10,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651616789] [2023-12-19 13:18:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:10,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:18:10,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:18:10,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772695270] [2023-12-19 13:18:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:10,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:18:10,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:18:10,217 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 13:18:10,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 13:18:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:18:10,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 13:18:10,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:18:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1400 proven. 78 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2023-12-19 13:18:11,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:18:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-12-19 13:18:11,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:18:11,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651616789] [2023-12-19 13:18:11,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:18:11,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772695270] [2023-12-19 13:18:11,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772695270] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:18:11,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:18:11,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-12-19 13:18:11,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088288672] [2023-12-19 13:18:11,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:18:11,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 13:18:11,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:18:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 13:18:11,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-12-19 13:18:11,870 INFO L87 Difference]: Start difference. First operand 22367 states and 36109 transitions. Second operand has 26 states, 26 states have (on average 6.115384615384615) internal successors, (159), 26 states have internal predecessors, (159), 6 states have call successors, (78), 4 states have call predecessors, (78), 6 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-12-19 13:18:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:18:18,106 INFO L93 Difference]: Finished difference Result 64982 states and 104917 transitions. [2023-12-19 13:18:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-19 13:18:18,107 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.115384615384615) internal successors, (159), 26 states have internal predecessors, (159), 6 states have call successors, (78), 4 states have call predecessors, (78), 6 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) Word has length 274 [2023-12-19 13:18:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:18:18,178 INFO L225 Difference]: With dead ends: 64982 [2023-12-19 13:18:18,178 INFO L226 Difference]: Without dead ends: 42758 [2023-12-19 13:18:18,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1866, Invalid=4614, Unknown=0, NotChecked=0, Total=6480 [2023-12-19 13:18:18,202 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 7841 mSDsluCounter, 3064 mSDsCounter, 0 mSdLazyCounter, 3181 mSolverCounterSat, 1587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7841 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 4768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1587 IncrementalHoareTripleChecker+Valid, 3181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-19 13:18:18,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7841 Valid, 3266 Invalid, 4768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1587 Valid, 3181 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-19 13:18:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42758 states. [2023-12-19 13:18:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42758 to 32137. [2023-12-19 13:18:19,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32137 states, 29588 states have (on average 1.6224482898472354) internal successors, (48005), 29688 states have internal predecessors, (48005), 2185 states have call successors, (2185), 363 states have call predecessors, (2185), 363 states have return successors, (2185), 2085 states have call predecessors, (2185), 2185 states have call successors, (2185) [2023-12-19 13:18:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32137 states to 32137 states and 52375 transitions. [2023-12-19 13:18:19,602 INFO L78 Accepts]: Start accepts. Automaton has 32137 states and 52375 transitions. Word has length 274 [2023-12-19 13:18:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:18:19,602 INFO L495 AbstractCegarLoop]: Abstraction has 32137 states and 52375 transitions. [2023-12-19 13:18:19,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.115384615384615) internal successors, (159), 26 states have internal predecessors, (159), 6 states have call successors, (78), 4 states have call predecessors, (78), 6 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-12-19 13:18:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 32137 states and 52375 transitions. [2023-12-19 13:18:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 13:18:19,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:18:19,609 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:18:19,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-19 13:18:19,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 13:18:19,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:18:19,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:18:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2052986907, now seen corresponding path program 1 times [2023-12-19 13:18:19,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:18:19,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987047317] [2023-12-19 13:18:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:19,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:18:19,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:18:19,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402710640] [2023-12-19 13:18:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:19,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:18:19,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:18:19,846 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 13:18:19,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 13:18:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:18:20,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 13:18:20,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:18:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1490 proven. 48 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2023-12-19 13:18:20,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:18:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 66 proven. 48 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-12-19 13:18:21,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:18:21,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987047317] [2023-12-19 13:18:21,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:18:21,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402710640] [2023-12-19 13:18:21,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402710640] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:18:21,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:18:21,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-12-19 13:18:21,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525134591] [2023-12-19 13:18:21,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:18:21,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 13:18:21,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:18:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 13:18:21,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-12-19 13:18:21,369 INFO L87 Difference]: Start difference. First operand 32137 states and 52375 transitions. Second operand has 26 states, 26 states have (on average 5.769230769230769) internal successors, (150), 26 states have internal predecessors, (150), 4 states have call successors, (78), 3 states have call predecessors, (78), 5 states have return successors, (78), 4 states have call predecessors, (78), 4 states have call successors, (78) [2023-12-19 13:18:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:18:38,594 INFO L93 Difference]: Finished difference Result 174164 states and 278411 transitions. [2023-12-19 13:18:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-12-19 13:18:38,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.769230769230769) internal successors, (150), 26 states have internal predecessors, (150), 4 states have call successors, (78), 3 states have call predecessors, (78), 5 states have return successors, (78), 4 states have call predecessors, (78), 4 states have call successors, (78) Word has length 275 [2023-12-19 13:18:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:18:39,066 INFO L225 Difference]: With dead ends: 174164 [2023-12-19 13:18:39,067 INFO L226 Difference]: Without dead ends: 162103 [2023-12-19 13:18:39,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8367 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4331, Invalid=15129, Unknown=0, NotChecked=0, Total=19460 [2023-12-19 13:18:39,113 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 9010 mSDsluCounter, 6495 mSDsCounter, 0 mSdLazyCounter, 4937 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9054 SdHoareTripleChecker+Valid, 7015 SdHoareTripleChecker+Invalid, 6229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 4937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-19 13:18:39,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9054 Valid, 7015 Invalid, 6229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1292 Valid, 4937 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-12-19 13:18:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162103 states. [2023-12-19 13:18:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162103 to 91917. [2023-12-19 13:18:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91917 states, 82528 states have (on average 1.6048856145792942) internal successors, (132448), 83104 states have internal predecessors, (132448), 7983 states have call successors, (7983), 1405 states have call predecessors, (7983), 1405 states have return successors, (7983), 7407 states have call predecessors, (7983), 7983 states have call successors, (7983) [2023-12-19 13:18:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91917 states to 91917 states and 148414 transitions. [2023-12-19 13:18:45,268 INFO L78 Accepts]: Start accepts. Automaton has 91917 states and 148414 transitions. Word has length 275 [2023-12-19 13:18:45,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:18:45,270 INFO L495 AbstractCegarLoop]: Abstraction has 91917 states and 148414 transitions. [2023-12-19 13:18:45,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.769230769230769) internal successors, (150), 26 states have internal predecessors, (150), 4 states have call successors, (78), 3 states have call predecessors, (78), 5 states have return successors, (78), 4 states have call predecessors, (78), 4 states have call successors, (78) [2023-12-19 13:18:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 91917 states and 148414 transitions. [2023-12-19 13:18:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 13:18:45,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:18:45,288 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:18:45,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 13:18:45,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 13:18:45,495 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:18:45,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:18:45,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1818415602, now seen corresponding path program 1 times [2023-12-19 13:18:45,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:18:45,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462794045] [2023-12-19 13:18:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:18:45,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:18:45,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321943737] [2023-12-19 13:18:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:18:45,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:18:45,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:18:45,531 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 13:18:45,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 13:18:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:18:45,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 13:18:45,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:18:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1934 proven. 129 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2023-12-19 13:18:46,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:18:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 93 proven. 132 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2023-12-19 13:18:47,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:18:47,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462794045] [2023-12-19 13:18:47,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:18:47,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321943737] [2023-12-19 13:18:47,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321943737] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:18:47,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:18:47,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-12-19 13:18:47,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018521333] [2023-12-19 13:18:47,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:18:47,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 13:18:47,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:18:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 13:18:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-12-19 13:18:47,677 INFO L87 Difference]: Start difference. First operand 91917 states and 148414 transitions. Second operand has 26 states, 26 states have (on average 6.230769230769231) internal successors, (162), 26 states have internal predecessors, (162), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-12-19 13:19:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:19:33,457 INFO L93 Difference]: Finished difference Result 478953 states and 754724 transitions. [2023-12-19 13:19:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-12-19 13:19:33,458 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.230769230769231) internal successors, (162), 26 states have internal predecessors, (162), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) Word has length 275 [2023-12-19 13:19:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:19:34,937 INFO L225 Difference]: With dead ends: 478953 [2023-12-19 13:19:34,937 INFO L226 Difference]: Without dead ends: 437509 [2023-12-19 13:19:35,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9285 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4868, Invalid=15438, Unknown=0, NotChecked=0, Total=20306 [2023-12-19 13:19:35,055 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 6784 mSDsluCounter, 6770 mSDsCounter, 0 mSdLazyCounter, 6261 mSolverCounterSat, 1423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6821 SdHoareTripleChecker+Valid, 7140 SdHoareTripleChecker+Invalid, 7684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1423 IncrementalHoareTripleChecker+Valid, 6261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-19 13:19:35,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6821 Valid, 7140 Invalid, 7684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1423 Valid, 6261 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-12-19 13:19:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437509 states. [2023-12-19 13:19:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437509 to 163032. [2023-12-19 13:19:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163032 states, 147601 states have (on average 1.6112831213880665) internal successors, (237827), 148544 states have internal predecessors, (237827), 12726 states have call successors, (12726), 2704 states have call predecessors, (12726), 2704 states have return successors, (12726), 11783 states have call predecessors, (12726), 12726 states have call successors, (12726) [2023-12-19 13:19:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163032 states to 163032 states and 263279 transitions. [2023-12-19 13:19:49,582 INFO L78 Accepts]: Start accepts. Automaton has 163032 states and 263279 transitions. Word has length 275 [2023-12-19 13:19:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:19:49,583 INFO L495 AbstractCegarLoop]: Abstraction has 163032 states and 263279 transitions. [2023-12-19 13:19:49,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.230769230769231) internal successors, (162), 26 states have internal predecessors, (162), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-12-19 13:19:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 163032 states and 263279 transitions. [2023-12-19 13:19:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 13:19:49,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:19:49,612 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:19:49,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 13:19:49,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 13:19:49,829 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:19:49,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:19:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 12977268, now seen corresponding path program 1 times [2023-12-19 13:19:49,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:19:49,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951811868] [2023-12-19 13:19:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:19:49,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:19:49,851 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:19:49,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313290009] [2023-12-19 13:19:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:19:49,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:19:49,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:19:49,852 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 13:19:49,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 13:19:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:19:50,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 13:19:50,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:19:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1934 proven. 129 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2023-12-19 13:19:50,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:19:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 93 proven. 132 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2023-12-19 13:19:51,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:19:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951811868] [2023-12-19 13:19:51,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:19:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313290009] [2023-12-19 13:19:51,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313290009] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:19:51,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:19:51,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-12-19 13:19:51,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113716402] [2023-12-19 13:19:51,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:19:51,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 13:19:51,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:19:51,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 13:19:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2023-12-19 13:19:51,788 INFO L87 Difference]: Start difference. First operand 163032 states and 263279 transitions. Second operand has 24 states, 24 states have (on average 6.125) internal successors, (147), 24 states have internal predecessors, (147), 5 states have call successors, (67), 3 states have call predecessors, (67), 7 states have return successors, (68), 5 states have call predecessors, (68), 5 states have call successors, (68) [2023-12-19 13:20:56,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:20:56,077 INFO L93 Difference]: Finished difference Result 788393 states and 1271502 transitions. [2023-12-19 13:20:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-19 13:20:56,078 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.125) internal successors, (147), 24 states have internal predecessors, (147), 5 states have call successors, (67), 3 states have call predecessors, (67), 7 states have return successors, (68), 5 states have call predecessors, (68), 5 states have call successors, (68) Word has length 275 [2023-12-19 13:20:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:20:57,540 INFO L225 Difference]: With dead ends: 788393 [2023-12-19 13:20:57,540 INFO L226 Difference]: Without dead ends: 626646 [2023-12-19 13:20:57,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1386, Invalid=3444, Unknown=0, NotChecked=0, Total=4830 [2023-12-19 13:20:57,741 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 3476 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3487 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-19 13:20:57,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3487 Valid, 2550 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-19 13:20:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626646 states. [2023-12-19 13:21:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626646 to 131006. [2023-12-19 13:21:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131006 states, 126293 states have (on average 1.6826031529855179) internal successors, (212501), 126417 states have internal predecessors, (212501), 3599 states have call successors, (3599), 1113 states have call predecessors, (3599), 1113 states have return successors, (3599), 3475 states have call predecessors, (3599), 3599 states have call successors, (3599) [2023-12-19 13:21:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131006 states to 131006 states and 219699 transitions. [2023-12-19 13:21:08,163 INFO L78 Accepts]: Start accepts. Automaton has 131006 states and 219699 transitions. Word has length 275 [2023-12-19 13:21:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:21:08,163 INFO L495 AbstractCegarLoop]: Abstraction has 131006 states and 219699 transitions. [2023-12-19 13:21:08,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.125) internal successors, (147), 24 states have internal predecessors, (147), 5 states have call successors, (67), 3 states have call predecessors, (67), 7 states have return successors, (68), 5 states have call predecessors, (68), 5 states have call successors, (68) [2023-12-19 13:21:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 131006 states and 219699 transitions. [2023-12-19 13:21:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 13:21:08,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:21:08,182 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:21:08,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 13:21:08,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:21:08,389 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:21:08,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:21:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash -129758873, now seen corresponding path program 1 times [2023-12-19 13:21:08,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:21:08,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398541358] [2023-12-19 13:21:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:21:08,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:21:08,410 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:21:08,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632304391] [2023-12-19 13:21:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:21:08,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:21:08,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:21:08,413 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 13:21:08,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 13:21:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:21:08,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 13:21:08,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:21:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1832 proven. 111 refuted. 0 times theorem prover too weak. 1021 trivial. 0 not checked. [2023-12-19 13:21:09,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:21:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 111 proven. 114 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2023-12-19 13:21:09,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:21:09,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398541358] [2023-12-19 13:21:09,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:21:09,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632304391] [2023-12-19 13:21:09,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632304391] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:21:09,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:21:09,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-12-19 13:21:09,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029984900] [2023-12-19 13:21:09,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:21:09,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 13:21:09,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:21:09,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 13:21:09,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-12-19 13:21:09,717 INFO L87 Difference]: Start difference. First operand 131006 states and 219699 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 4 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2023-12-19 13:21:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:21:29,295 INFO L93 Difference]: Finished difference Result 261067 states and 436608 transitions. [2023-12-19 13:21:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-19 13:21:29,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 4 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) Word has length 275 [2023-12-19 13:21:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:21:29,618 INFO L225 Difference]: With dead ends: 261067 [2023-12-19 13:21:29,618 INFO L226 Difference]: Without dead ends: 202068 [2023-12-19 13:21:29,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 532 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=1754, Unknown=0, NotChecked=0, Total=2352 [2023-12-19 13:21:29,683 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 2508 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2525 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 13:21:29,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2525 Valid, 1877 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 13:21:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202068 states. [2023-12-19 13:21:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202068 to 120030. [2023-12-19 13:21:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120030 states, 115924 states have (on average 1.6826627790621442) internal successors, (195061), 116012 states have internal predecessors, (195061), 3071 states have call successors, (3071), 1034 states have call predecessors, (3071), 1034 states have return successors, (3071), 2983 states have call predecessors, (3071), 3071 states have call successors, (3071) [2023-12-19 13:21:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120030 states to 120030 states and 201203 transitions. [2023-12-19 13:21:35,876 INFO L78 Accepts]: Start accepts. Automaton has 120030 states and 201203 transitions. Word has length 275 [2023-12-19 13:21:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 13:21:35,877 INFO L495 AbstractCegarLoop]: Abstraction has 120030 states and 201203 transitions. [2023-12-19 13:21:35,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 23 states have internal predecessors, (144), 4 states have call successors, (61), 3 states have call predecessors, (61), 7 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2023-12-19 13:21:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 120030 states and 201203 transitions. [2023-12-19 13:21:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 13:21:35,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 13:21:35,914 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 13:21:35,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 13:21:36,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:21:36,121 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 13:21:36,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 13:21:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash 10789737, now seen corresponding path program 1 times [2023-12-19 13:21:36,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 13:21:36,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729008371] [2023-12-19 13:21:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:21:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 13:21:36,141 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 13:21:36,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818578133] [2023-12-19 13:21:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 13:21:36,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 13:21:36,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 13:21:36,142 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 13:21:36,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 13:21:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 13:21:36,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 13:21:36,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 13:21:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1248 proven. 81 refuted. 0 times theorem prover too weak. 1635 trivial. 0 not checked. [2023-12-19 13:21:37,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 13:21:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 33 proven. 81 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-12-19 13:21:37,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 13:21:37,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729008371] [2023-12-19 13:21:37,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 13:21:37,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818578133] [2023-12-19 13:21:37,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818578133] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 13:21:37,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 13:21:37,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2023-12-19 13:21:37,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902337497] [2023-12-19 13:21:37,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 13:21:37,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 13:21:37,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 13:21:37,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 13:21:37,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-19 13:21:37,915 INFO L87 Difference]: Start difference. First operand 120030 states and 201203 transitions. Second operand has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 22 states have internal predecessors, (153), 4 states have call successors, (78), 3 states have call predecessors, (78), 5 states have return successors, (78), 4 states have call predecessors, (78), 4 states have call successors, (78) [2023-12-19 13:21:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 13:21:57,335 INFO L93 Difference]: Finished difference Result 439952 states and 728578 transitions. [2023-12-19 13:21:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-19 13:21:57,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 22 states have internal predecessors, (153), 4 states have call successors, (78), 3 states have call predecessors, (78), 5 states have return successors, (78), 4 states have call predecessors, (78), 4 states have call successors, (78) Word has length 275 [2023-12-19 13:21:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 13:21:58,005 INFO L225 Difference]: With dead ends: 439952 [2023-12-19 13:21:58,005 INFO L226 Difference]: Without dead ends: 322808 [2023-12-19 13:21:58,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=901, Invalid=2521, Unknown=0, NotChecked=0, Total=3422 [2023-12-19 13:21:58,123 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 6524 mSDsluCounter, 4746 mSDsCounter, 0 mSdLazyCounter, 3764 mSolverCounterSat, 1071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6584 SdHoareTripleChecker+Valid, 5041 SdHoareTripleChecker+Invalid, 4835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1071 IncrementalHoareTripleChecker+Valid, 3764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-19 13:21:58,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6584 Valid, 5041 Invalid, 4835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1071 Valid, 3764 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-19 13:21:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322808 states.