/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-55.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 00:54:53,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 00:54:53,490 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 00:54:53,495 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 00:54:53,495 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 00:54:53,522 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 00:54:53,523 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 00:54:53,524 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 00:54:53,524 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 00:54:53,528 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 00:54:53,528 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 00:54:53,529 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 00:54:53,529 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 00:54:53,530 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 00:54:53,531 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 00:54:53,531 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 00:54:53,531 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 00:54:53,531 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 00:54:53,532 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 00:54:53,532 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 00:54:53,533 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 00:54:53,533 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 00:54:53,534 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 00:54:53,534 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 00:54:53,534 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 00:54:53,534 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 00:54:53,535 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 00:54:53,535 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 00:54:53,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 00:54:53,536 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 00:54:53,536 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 00:54:53,537 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 00:54:53,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 00:54:53,537 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 00:54:53,537 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 00:54:53,537 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 00:54:53,538 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 00:54:53,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 00:54:53,538 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 00:54:53,538 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 00:54:53,538 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 00:54:53,539 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 00:54:53,539 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 00:54:53,539 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 00:54:53,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 00:54:53,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 00:54:53,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 00:54:53,800 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 00:54:53,800 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 00:54:53,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-55.i [2023-12-21 00:54:55,020 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 00:54:55,272 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 00:54:55,273 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-55.i [2023-12-21 00:54:55,284 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8864ee25/64a814a4714e4d8ea40fc046b8b93095/FLAG1d77345b4 [2023-12-21 00:54:55,295 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8864ee25/64a814a4714e4d8ea40fc046b8b93095 [2023-12-21 00:54:55,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 00:54:55,298 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 00:54:55,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 00:54:55,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 00:54:55,306 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 00:54:55,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:55,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242a37c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55, skipping insertion in model container [2023-12-21 00:54:55,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:55,361 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 00:54:55,489 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_amount500_file-55.i[916,929] [2023-12-21 00:54:55,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 00:54:55,765 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 00:54:55,776 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_amount500_file-55.i[916,929] [2023-12-21 00:54:55,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 00:54:55,927 INFO L206 MainTranslator]: Completed translation [2023-12-21 00:54:55,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55 WrapperNode [2023-12-21 00:54:55,927 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 00:54:55,928 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 00:54:55,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 00:54:55,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 00:54:55,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:55,975 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,078 INFO L138 Inliner]: procedures = 26, calls = 91, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 686 [2023-12-21 00:54:56,080 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 00:54:56,080 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 00:54:56,081 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 00:54:56,081 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 00:54:56,090 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,110 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,195 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-21 00:54:56,196 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,196 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,233 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,246 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,252 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,269 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 00:54:56,269 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 00:54:56,270 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 00:54:56,270 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 00:54:56,270 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (1/1) ... [2023-12-21 00:54:56,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 00:54:56,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:54:56,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 00:54:56,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 00:54:56,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 00:54:56,328 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 00:54:56,328 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 00:54:56,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 00:54:56,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 00:54:56,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 00:54:56,455 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 00:54:56,457 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 00:54:57,364 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 00:54:57,424 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 00:54:57,424 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 00:54:57,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:54:57 BoogieIcfgContainer [2023-12-21 00:54:57,425 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 00:54:57,427 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 00:54:57,427 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 00:54:57,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 00:54:57,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:54:55" (1/3) ... [2023-12-21 00:54:57,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba80149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:54:57, skipping insertion in model container [2023-12-21 00:54:57,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:54:55" (2/3) ... [2023-12-21 00:54:57,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba80149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:54:57, skipping insertion in model container [2023-12-21 00:54:57,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:54:57" (3/3) ... [2023-12-21 00:54:57,433 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-55.i [2023-12-21 00:54:57,450 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 00:54:57,450 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 00:54:57,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 00:54:57,508 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;@7bf1d95b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 00:54:57,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 00:54:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 254 states, 173 states have (on average 1.5317919075144508) internal successors, (265), 174 states have internal predecessors, (265), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-21 00:54:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-21 00:54:57,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:54:57,547 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:54:57,548 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:54:57,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:54:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash -449465841, now seen corresponding path program 1 times [2023-12-21 00:54:57,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:54:57,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019141635] [2023-12-21 00:54:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:54:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:54:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:54:57,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:54:57,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019141635] [2023-12-21 00:54:57,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 00:54:57,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255098283] [2023-12-21 00:54:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:54:57,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:54:57,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:54:57,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:54:57,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 00:54:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:54:58,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 00:54:58,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:54:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2023-12-21 00:54:58,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:54:58,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255098283] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:54:58,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:54:58,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 00:54:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806315492] [2023-12-21 00:54:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:54:58,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 00:54:58,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:54:58,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 00:54:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 00:54:58,486 INFO L87 Difference]: Start difference. First operand has 254 states, 173 states have (on average 1.5317919075144508) internal successors, (265), 174 states have internal predecessors, (265), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) [2023-12-21 00:54:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:54:58,582 INFO L93 Difference]: Finished difference Result 504 states and 916 transitions. [2023-12-21 00:54:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 00:54:58,584 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) Word has length 530 [2023-12-21 00:54:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:54:58,595 INFO L225 Difference]: With dead ends: 504 [2023-12-21 00:54:58,595 INFO L226 Difference]: Without dead ends: 251 [2023-12-21 00:54:58,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 00:54:58,603 INFO L413 NwaCegarLoop]: 410 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, 410 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 [2023-12-21 00:54:58,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 410 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 00:54:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-12-21 00:54:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2023-12-21 00:54:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 171 states have (on average 1.5029239766081872) internal successors, (257), 171 states have internal predecessors, (257), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-21 00:54:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 413 transitions. [2023-12-21 00:54:58,673 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 413 transitions. Word has length 530 [2023-12-21 00:54:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:54:58,673 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 413 transitions. [2023-12-21 00:54:58,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.5) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) [2023-12-21 00:54:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 413 transitions. [2023-12-21 00:54:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-21 00:54:58,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:54:58,685 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:54:58,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 00:54:58,886 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 [2023-12-21 00:54:58,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:54:58,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:54:58,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2078235583, now seen corresponding path program 1 times [2023-12-21 00:54:58,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:54:58,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226966636] [2023-12-21 00:54:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:54:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:54:59,000 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:54:59,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885693133] [2023-12-21 00:54:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:54:59,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:54:59,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:54:59,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:54:59,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 00:54:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:54:59,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-21 00:54:59,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:00,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:00,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:00,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226966636] [2023-12-21 00:55:00,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:00,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885693133] [2023-12-21 00:55:00,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885693133] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:00,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:00,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 00:55:00,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034393068] [2023-12-21 00:55:00,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:00,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 00:55:00,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:00,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 00:55:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 00:55:00,579 INFO L87 Difference]: Start difference. First operand 251 states and 413 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:00,788 INFO L93 Difference]: Finished difference Result 509 states and 836 transitions. [2023-12-21 00:55:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 00:55:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 530 [2023-12-21 00:55:00,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:00,794 INFO L225 Difference]: With dead ends: 509 [2023-12-21 00:55:00,794 INFO L226 Difference]: Without dead ends: 259 [2023-12-21 00:55:00,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:55:00,797 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 12 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:00,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1218 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 00:55:00,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-12-21 00:55:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 253. [2023-12-21 00:55:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 173 states have (on average 1.4971098265895955) internal successors, (259), 173 states have internal predecessors, (259), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-21 00:55:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 415 transitions. [2023-12-21 00:55:00,821 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 415 transitions. Word has length 530 [2023-12-21 00:55:00,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:00,824 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 415 transitions. [2023-12-21 00:55:00,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:00,824 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 415 transitions. [2023-12-21 00:55:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-21 00:55:00,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:00,830 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:00,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:01,039 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 [2023-12-21 00:55:01,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:01,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2135493885, now seen corresponding path program 1 times [2023-12-21 00:55:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:01,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554750813] [2023-12-21 00:55:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:01,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:01,161 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:01,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292533340] [2023-12-21 00:55:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:01,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:01,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:01,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:01,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 00:55:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:01,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-21 00:55:01,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:01,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:01,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:01,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554750813] [2023-12-21 00:55:01,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:01,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292533340] [2023-12-21 00:55:01,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292533340] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:01,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:01,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 00:55:01,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769359523] [2023-12-21 00:55:01,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:01,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 00:55:01,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:01,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 00:55:01,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 00:55:01,610 INFO L87 Difference]: Start difference. First operand 253 states and 415 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:01,684 INFO L93 Difference]: Finished difference Result 509 states and 834 transitions. [2023-12-21 00:55:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 00:55:01,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 530 [2023-12-21 00:55:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:01,688 INFO L225 Difference]: With dead ends: 509 [2023-12-21 00:55:01,688 INFO L226 Difference]: Without dead ends: 257 [2023-12-21 00:55:01,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:55:01,691 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 3 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:01,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1219 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 00:55:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-12-21 00:55:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2023-12-21 00:55:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 175 states have (on average 1.4914285714285713) internal successors, (261), 175 states have internal predecessors, (261), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-21 00:55:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 417 transitions. [2023-12-21 00:55:01,752 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 417 transitions. Word has length 530 [2023-12-21 00:55:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:01,756 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 417 transitions. [2023-12-21 00:55:01,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 417 transitions. [2023-12-21 00:55:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-21 00:55:01,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:01,762 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:01,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:01,972 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 [2023-12-21 00:55:01,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:01,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:01,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2135553467, now seen corresponding path program 1 times [2023-12-21 00:55:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:01,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991744407] [2023-12-21 00:55:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:02,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:02,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189435641] [2023-12-21 00:55:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:02,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:02,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:02,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:02,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 00:55:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:02,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:55:02,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:02,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:02,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991744407] [2023-12-21 00:55:02,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189435641] [2023-12-21 00:55:02,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189435641] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:02,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:02,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:55:02,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647463578] [2023-12-21 00:55:02,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:02,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:55:02,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:02,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:55:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:02,588 INFO L87 Difference]: Start difference. First operand 255 states and 417 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:02,637 INFO L93 Difference]: Finished difference Result 678 states and 1111 transitions. [2023-12-21 00:55:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:55:02,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 530 [2023-12-21 00:55:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:02,643 INFO L225 Difference]: With dead ends: 678 [2023-12-21 00:55:02,644 INFO L226 Difference]: Without dead ends: 424 [2023-12-21 00:55:02,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:02,648 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 212 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:02,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 807 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 00:55:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-12-21 00:55:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 421. [2023-12-21 00:55:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 301 states have (on average 1.521594684385382) internal successors, (458), 302 states have internal predecessors, (458), 117 states have call successors, (117), 2 states have call predecessors, (117), 2 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2023-12-21 00:55:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 692 transitions. [2023-12-21 00:55:02,688 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 692 transitions. Word has length 530 [2023-12-21 00:55:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:02,691 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 692 transitions. [2023-12-21 00:55:02,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 692 transitions. [2023-12-21 00:55:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-21 00:55:02,696 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:02,696 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:02,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:02,905 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 [2023-12-21 00:55:02,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:02,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1548747453, now seen corresponding path program 1 times [2023-12-21 00:55:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:02,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207050338] [2023-12-21 00:55:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:02,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:02,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466504586] [2023-12-21 00:55:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:02,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:02,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:02,974 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:02,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 00:55:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:03,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:55:03,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:03,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:03,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207050338] [2023-12-21 00:55:03,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466504586] [2023-12-21 00:55:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466504586] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:03,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:03,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:55:03,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641487624] [2023-12-21 00:55:03,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:03,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:55:03,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:03,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:55:03,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:03,467 INFO L87 Difference]: Start difference. First operand 421 states and 692 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:03,529 INFO L93 Difference]: Finished difference Result 1158 states and 1914 transitions. [2023-12-21 00:55:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:55:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 530 [2023-12-21 00:55:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:03,535 INFO L225 Difference]: With dead ends: 1158 [2023-12-21 00:55:03,536 INFO L226 Difference]: Without dead ends: 738 [2023-12-21 00:55:03,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:03,538 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 409 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:03,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1219 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 00:55:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2023-12-21 00:55:03,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 554. [2023-12-21 00:55:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 354 states have (on average 1.4406779661016949) internal successors, (510), 356 states have internal predecessors, (510), 195 states have call successors, (195), 4 states have call predecessors, (195), 4 states have return successors, (195), 193 states have call predecessors, (195), 195 states have call successors, (195) [2023-12-21 00:55:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 900 transitions. [2023-12-21 00:55:03,586 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 900 transitions. Word has length 530 [2023-12-21 00:55:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:03,587 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 900 transitions. [2023-12-21 00:55:03,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 900 transitions. [2023-12-21 00:55:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-21 00:55:03,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:03,591 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:03,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:03,800 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 [2023-12-21 00:55:03,801 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:03,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1248330621, now seen corresponding path program 1 times [2023-12-21 00:55:03,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:03,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583244726] [2023-12-21 00:55:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:03,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:03,873 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:03,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683939432] [2023-12-21 00:55:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:03,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:03,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:03,875 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:03,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 00:55:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:04,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:55:04,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:04,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:04,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:04,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583244726] [2023-12-21 00:55:04,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:04,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683939432] [2023-12-21 00:55:04,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683939432] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:04,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:04,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:55:04,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946228300] [2023-12-21 00:55:04,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:04,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:55:04,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:04,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:55:04,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:04,319 INFO L87 Difference]: Start difference. First operand 554 states and 900 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:04,406 INFO L93 Difference]: Finished difference Result 1508 states and 2452 transitions. [2023-12-21 00:55:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:55:04,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 530 [2023-12-21 00:55:04,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:04,414 INFO L225 Difference]: With dead ends: 1508 [2023-12-21 00:55:04,414 INFO L226 Difference]: Without dead ends: 1020 [2023-12-21 00:55:04,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:04,417 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 388 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:04,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 803 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 00:55:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2023-12-21 00:55:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 568. [2023-12-21 00:55:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 368 states have (on average 1.4456521739130435) internal successors, (532), 370 states have internal predecessors, (532), 195 states have call successors, (195), 4 states have call predecessors, (195), 4 states have return successors, (195), 193 states have call predecessors, (195), 195 states have call successors, (195) [2023-12-21 00:55:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 922 transitions. [2023-12-21 00:55:04,519 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 922 transitions. Word has length 530 [2023-12-21 00:55:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:04,520 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 922 transitions. [2023-12-21 00:55:04,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 922 transitions. [2023-12-21 00:55:04,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-21 00:55:04,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:04,525 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:04,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:04,734 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 [2023-12-21 00:55:04,734 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:04,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash 742023741, now seen corresponding path program 1 times [2023-12-21 00:55:04,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:04,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176936221] [2023-12-21 00:55:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:04,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:04,800 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:04,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112391874] [2023-12-21 00:55:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:04,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:04,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:04,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 00:55:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:05,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:55:05,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:05,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:05,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176936221] [2023-12-21 00:55:05,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112391874] [2023-12-21 00:55:05,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112391874] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:05,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:05,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:55:05,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034622155] [2023-12-21 00:55:05,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:05,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:55:05,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:05,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:55:05,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:05,283 INFO L87 Difference]: Start difference. First operand 568 states and 922 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:05,392 INFO L93 Difference]: Finished difference Result 1397 states and 2276 transitions. [2023-12-21 00:55:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:55:05,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 530 [2023-12-21 00:55:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:05,397 INFO L225 Difference]: With dead ends: 1397 [2023-12-21 00:55:05,397 INFO L226 Difference]: Without dead ends: 895 [2023-12-21 00:55:05,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:05,400 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 231 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:05,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 958 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 00:55:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-12-21 00:55:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 891. [2023-12-21 00:55:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 631 states have (on average 1.4896988906497624) internal successors, (940), 635 states have internal predecessors, (940), 253 states have call successors, (253), 6 states have call predecessors, (253), 6 states have return successors, (253), 249 states have call predecessors, (253), 253 states have call successors, (253) [2023-12-21 00:55:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1446 transitions. [2023-12-21 00:55:05,459 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1446 transitions. Word has length 530 [2023-12-21 00:55:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:05,460 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1446 transitions. [2023-12-21 00:55:05,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1446 transitions. [2023-12-21 00:55:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-21 00:55:05,464 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:05,465 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:05,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:05,675 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 [2023-12-21 00:55:05,675 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:05,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:05,676 INFO L85 PathProgramCache]: Analyzing trace with hash -728686433, now seen corresponding path program 1 times [2023-12-21 00:55:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:05,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450669069] [2023-12-21 00:55:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:05,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:05,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402231581] [2023-12-21 00:55:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:05,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:05,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:05,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:05,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 00:55:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:06,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:55:06,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:06,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:06,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450669069] [2023-12-21 00:55:06,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402231581] [2023-12-21 00:55:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402231581] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:06,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:06,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:55:06,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886653308] [2023-12-21 00:55:06,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:06,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:55:06,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:55:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:06,298 INFO L87 Difference]: Start difference. First operand 891 states and 1446 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:06,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:06,422 INFO L93 Difference]: Finished difference Result 2533 states and 4114 transitions. [2023-12-21 00:55:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:55:06,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 530 [2023-12-21 00:55:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:06,432 INFO L225 Difference]: With dead ends: 2533 [2023-12-21 00:55:06,432 INFO L226 Difference]: Without dead ends: 1708 [2023-12-21 00:55:06,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:55:06,436 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 395 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:06,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 829 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 00:55:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2023-12-21 00:55:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1706. [2023-12-21 00:55:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1227 states have (on average 1.4775876120619398) internal successors, (1813), 1234 states have internal predecessors, (1813), 467 states have call successors, (467), 11 states have call predecessors, (467), 11 states have return successors, (467), 460 states have call predecessors, (467), 467 states have call successors, (467) [2023-12-21 00:55:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2747 transitions. [2023-12-21 00:55:06,558 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2747 transitions. Word has length 530 [2023-12-21 00:55:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:06,559 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 2747 transitions. [2023-12-21 00:55:06,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2747 transitions. [2023-12-21 00:55:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-12-21 00:55:06,563 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:06,564 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:06,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:06,773 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 [2023-12-21 00:55:06,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:06,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:06,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1086252515, now seen corresponding path program 1 times [2023-12-21 00:55:06,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084190043] [2023-12-21 00:55:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:06,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:06,840 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:06,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550589924] [2023-12-21 00:55:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:06,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:06,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:06,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:06,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 00:55:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:07,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-21 00:55:07,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:07,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:07,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:07,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084190043] [2023-12-21 00:55:07,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:07,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550589924] [2023-12-21 00:55:07,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550589924] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:07,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:07,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 00:55:07,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755416489] [2023-12-21 00:55:07,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:07,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 00:55:07,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 00:55:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 00:55:07,359 INFO L87 Difference]: Start difference. First operand 1706 states and 2747 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:07,818 INFO L93 Difference]: Finished difference Result 3529 states and 5674 transitions. [2023-12-21 00:55:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 00:55:07,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 530 [2023-12-21 00:55:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:07,828 INFO L225 Difference]: With dead ends: 3529 [2023-12-21 00:55:07,828 INFO L226 Difference]: Without dead ends: 1771 [2023-12-21 00:55:07,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:55:07,833 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 641 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:07,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 1156 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 00:55:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2023-12-21 00:55:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1199. [2023-12-21 00:55:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 978 states have (on average 1.5460122699386503) internal successors, (1512), 980 states have internal predecessors, (1512), 214 states have call successors, (214), 6 states have call predecessors, (214), 6 states have return successors, (214), 212 states have call predecessors, (214), 214 states have call successors, (214) [2023-12-21 00:55:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1940 transitions. [2023-12-21 00:55:07,928 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1940 transitions. Word has length 530 [2023-12-21 00:55:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:07,929 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 1940 transitions. [2023-12-21 00:55:07,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1940 transitions. [2023-12-21 00:55:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-21 00:55:07,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:07,934 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:07,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:08,143 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 [2023-12-21 00:55:08,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:08,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:08,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1020906031, now seen corresponding path program 1 times [2023-12-21 00:55:08,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:08,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960537103] [2023-12-21 00:55:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:08,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:08,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160304347] [2023-12-21 00:55:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:08,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:08,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:08,200 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:08,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 00:55:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:08,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-21 00:55:08,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:08,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:08,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:08,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960537103] [2023-12-21 00:55:08,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:08,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160304347] [2023-12-21 00:55:08,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160304347] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:08,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:08,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 00:55:08,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276516729] [2023-12-21 00:55:08,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:08,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 00:55:08,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:08,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 00:55:08,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 00:55:08,716 INFO L87 Difference]: Start difference. First operand 1199 states and 1940 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:09,066 INFO L93 Difference]: Finished difference Result 3487 states and 5608 transitions. [2023-12-21 00:55:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 00:55:09,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 531 [2023-12-21 00:55:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:09,076 INFO L225 Difference]: With dead ends: 3487 [2023-12-21 00:55:09,076 INFO L226 Difference]: Without dead ends: 2289 [2023-12-21 00:55:09,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:55:09,080 INFO L413 NwaCegarLoop]: 845 mSDtfsCounter, 791 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:09,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 2015 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 00:55:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2023-12-21 00:55:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1101. [2023-12-21 00:55:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 938 states have (on average 1.537313432835821) internal successors, (1442), 938 states have internal predecessors, (1442), 156 states have call successors, (156), 6 states have call predecessors, (156), 6 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-12-21 00:55:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1754 transitions. [2023-12-21 00:55:09,170 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1754 transitions. Word has length 531 [2023-12-21 00:55:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:09,171 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1754 transitions. [2023-12-21 00:55:09,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1754 transitions. [2023-12-21 00:55:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-21 00:55:09,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:09,176 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:09,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:09,385 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 [2023-12-21 00:55:09,386 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:09,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:09,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1908128877, now seen corresponding path program 1 times [2023-12-21 00:55:09,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:09,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904448843] [2023-12-21 00:55:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:09,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:09,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:09,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461267576] [2023-12-21 00:55:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:09,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:09,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:09,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:09,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 00:55:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:09,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-21 00:55:09,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:09,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:09,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:09,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904448843] [2023-12-21 00:55:09,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:09,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461267576] [2023-12-21 00:55:09,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461267576] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:09,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:09,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 00:55:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73973265] [2023-12-21 00:55:09,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:09,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 00:55:09,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 00:55:09,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 00:55:09,984 INFO L87 Difference]: Start difference. First operand 1101 states and 1754 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:10,298 INFO L93 Difference]: Finished difference Result 3336 states and 5265 transitions. [2023-12-21 00:55:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 00:55:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 531 [2023-12-21 00:55:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:10,309 INFO L225 Difference]: With dead ends: 3336 [2023-12-21 00:55:10,309 INFO L226 Difference]: Without dead ends: 2236 [2023-12-21 00:55:10,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:55:10,313 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 835 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 2085 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:10,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 2085 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 00:55:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2023-12-21 00:55:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1073. [2023-12-21 00:55:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 910 states have (on average 1.5340659340659342) internal successors, (1396), 910 states have internal predecessors, (1396), 156 states have call successors, (156), 6 states have call predecessors, (156), 6 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-12-21 00:55:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1708 transitions. [2023-12-21 00:55:10,392 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1708 transitions. Word has length 531 [2023-12-21 00:55:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:10,393 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1708 transitions. [2023-12-21 00:55:10,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1708 transitions. [2023-12-21 00:55:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-21 00:55:10,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:10,397 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:10,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:10,606 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 [2023-12-21 00:55:10,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:10,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash -646204462, now seen corresponding path program 1 times [2023-12-21 00:55:10,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:10,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209474710] [2023-12-21 00:55:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:10,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:10,660 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:10,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433128092] [2023-12-21 00:55:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:10,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:10,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:10,662 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:10,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 00:55:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:11,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 00:55:11,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:11,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:11,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:11,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209474710] [2023-12-21 00:55:11,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:11,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433128092] [2023-12-21 00:55:11,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433128092] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:11,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:11,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 00:55:11,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719360334] [2023-12-21 00:55:11,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:11,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 00:55:11,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 00:55:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:55:11,215 INFO L87 Difference]: Start difference. First operand 1073 states and 1708 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:11,603 INFO L93 Difference]: Finished difference Result 3201 states and 5102 transitions. [2023-12-21 00:55:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 00:55:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 531 [2023-12-21 00:55:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:11,612 INFO L225 Difference]: With dead ends: 3201 [2023-12-21 00:55:11,612 INFO L226 Difference]: Without dead ends: 2129 [2023-12-21 00:55:11,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:55:11,615 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 598 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:11,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 1360 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 00:55:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2023-12-21 00:55:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2119. [2023-12-21 00:55:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 1794 states have (on average 1.5306577480490524) internal successors, (2746), 1794 states have internal predecessors, (2746), 312 states have call successors, (312), 12 states have call predecessors, (312), 12 states have return successors, (312), 312 states have call predecessors, (312), 312 states have call successors, (312) [2023-12-21 00:55:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3370 transitions. [2023-12-21 00:55:11,740 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3370 transitions. Word has length 531 [2023-12-21 00:55:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:11,741 INFO L495 AbstractCegarLoop]: Abstraction has 2119 states and 3370 transitions. [2023-12-21 00:55:11,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:11,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3370 transitions. [2023-12-21 00:55:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-12-21 00:55:11,746 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:11,746 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:11,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:11,955 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 [2023-12-21 00:55:11,956 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:11,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash 55395412, now seen corresponding path program 1 times [2023-12-21 00:55:11,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:11,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731024832] [2023-12-21 00:55:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:11,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:12,008 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:12,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031841217] [2023-12-21 00:55:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:12,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:12,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:12,010 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:12,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 00:55:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:12,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 00:55:12,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:12,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:12,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:12,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731024832] [2023-12-21 00:55:12,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:12,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031841217] [2023-12-21 00:55:12,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031841217] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:12,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:12,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 00:55:12,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127443659] [2023-12-21 00:55:12,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 00:55:12,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 00:55:12,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:55:12,626 INFO L87 Difference]: Start difference. First operand 2119 states and 3370 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:13,057 INFO L93 Difference]: Finished difference Result 4947 states and 7834 transitions. [2023-12-21 00:55:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 00:55:13,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 531 [2023-12-21 00:55:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:13,069 INFO L225 Difference]: With dead ends: 4947 [2023-12-21 00:55:13,069 INFO L226 Difference]: Without dead ends: 2829 [2023-12-21 00:55:13,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-21 00:55:13,075 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 1079 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 2199 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:13,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 2199 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 00:55:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2023-12-21 00:55:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2119. [2023-12-21 00:55:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 1794 states have (on average 1.5306577480490524) internal successors, (2746), 1794 states have internal predecessors, (2746), 312 states have call successors, (312), 12 states have call predecessors, (312), 12 states have return successors, (312), 312 states have call predecessors, (312), 312 states have call successors, (312) [2023-12-21 00:55:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3370 transitions. [2023-12-21 00:55:13,251 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3370 transitions. Word has length 531 [2023-12-21 00:55:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:13,251 INFO L495 AbstractCegarLoop]: Abstraction has 2119 states and 3370 transitions. [2023-12-21 00:55:13,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3370 transitions. [2023-12-21 00:55:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2023-12-21 00:55:13,262 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:13,263 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:13,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:13,474 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 [2023-12-21 00:55:13,475 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:13,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 71372537, now seen corresponding path program 1 times [2023-12-21 00:55:13,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:13,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128252975] [2023-12-21 00:55:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:13,550 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:13,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366576061] [2023-12-21 00:55:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:13,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:13,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:13,552 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:13,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 00:55:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:14,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-21 00:55:14,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:14,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:14,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128252975] [2023-12-21 00:55:14,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366576061] [2023-12-21 00:55:14,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366576061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:14,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:14,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 00:55:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099081205] [2023-12-21 00:55:14,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:14,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 00:55:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 00:55:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:55:14,284 INFO L87 Difference]: Start difference. First operand 2119 states and 3370 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:15,615 INFO L93 Difference]: Finished difference Result 7709 states and 12175 transitions. [2023-12-21 00:55:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 00:55:15,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 532 [2023-12-21 00:55:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:15,637 INFO L225 Difference]: With dead ends: 7709 [2023-12-21 00:55:15,637 INFO L226 Difference]: Without dead ends: 5591 [2023-12-21 00:55:15,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-21 00:55:15,643 INFO L413 NwaCegarLoop]: 884 mSDtfsCounter, 1902 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:15,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 2890 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 00:55:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5591 states. [2023-12-21 00:55:15,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5591 to 2567. [2023-12-21 00:55:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2567 states, 2242 states have (on average 1.5405887600356825) internal successors, (3454), 2242 states have internal predecessors, (3454), 312 states have call successors, (312), 12 states have call predecessors, (312), 12 states have return successors, (312), 312 states have call predecessors, (312), 312 states have call successors, (312) [2023-12-21 00:55:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2567 states to 2567 states and 4078 transitions. [2023-12-21 00:55:15,847 INFO L78 Accepts]: Start accepts. Automaton has 2567 states and 4078 transitions. Word has length 532 [2023-12-21 00:55:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:15,849 INFO L495 AbstractCegarLoop]: Abstraction has 2567 states and 4078 transitions. [2023-12-21 00:55:15,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2567 states and 4078 transitions. [2023-12-21 00:55:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2023-12-21 00:55:15,859 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:15,860 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:15,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:16,069 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 [2023-12-21 00:55:16,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:16,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash 937666194, now seen corresponding path program 1 times [2023-12-21 00:55:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:16,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398953778] [2023-12-21 00:55:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:16,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:16,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:16,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039571496] [2023-12-21 00:55:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:16,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:16,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:16,140 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:16,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 00:55:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:16,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 00:55:16,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5703 proven. 144 refuted. 0 times theorem prover too weak. 6165 trivial. 0 not checked. [2023-12-21 00:55:17,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:55:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 87 proven. 144 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-12-21 00:55:17,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:17,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398953778] [2023-12-21 00:55:17,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:17,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039571496] [2023-12-21 00:55:17,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039571496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:55:17,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:55:17,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-21 00:55:17,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790853509] [2023-12-21 00:55:17,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:55:17,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 00:55:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 00:55:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:55:17,397 INFO L87 Difference]: Start difference. First operand 2567 states and 4078 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (126), 2 states have call predecessors, (126), 4 states have return successors, (127), 2 states have call predecessors, (127), 2 states have call successors, (127) [2023-12-21 00:55:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:18,071 INFO L93 Difference]: Finished difference Result 4592 states and 7260 transitions. [2023-12-21 00:55:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 00:55:18,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (126), 2 states have call predecessors, (126), 4 states have return successors, (127), 2 states have call predecessors, (127), 2 states have call successors, (127) Word has length 532 [2023-12-21 00:55:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:18,082 INFO L225 Difference]: With dead ends: 4592 [2023-12-21 00:55:18,082 INFO L226 Difference]: Without dead ends: 2026 [2023-12-21 00:55:18,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1056 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-21 00:55:18,087 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 235 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:18,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 888 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 00:55:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2023-12-21 00:55:18,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1919. [2023-12-21 00:55:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1590 states have (on average 1.509433962264151) internal successors, (2400), 1590 states have internal predecessors, (2400), 312 states have call successors, (312), 16 states have call predecessors, (312), 16 states have return successors, (312), 312 states have call predecessors, (312), 312 states have call successors, (312) [2023-12-21 00:55:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 3024 transitions. [2023-12-21 00:55:18,285 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 3024 transitions. Word has length 532 [2023-12-21 00:55:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:18,286 INFO L495 AbstractCegarLoop]: Abstraction has 1919 states and 3024 transitions. [2023-12-21 00:55:18,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (126), 2 states have call predecessors, (126), 4 states have return successors, (127), 2 states have call predecessors, (127), 2 states have call successors, (127) [2023-12-21 00:55:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 3024 transitions. [2023-12-21 00:55:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-12-21 00:55:18,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:18,291 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:18,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:18,500 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 [2023-12-21 00:55:18,501 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:18,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1389347947, now seen corresponding path program 1 times [2023-12-21 00:55:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:18,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72983132] [2023-12-21 00:55:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:18,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:18,556 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:18,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818408334] [2023-12-21 00:55:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:18,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:18,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:18,557 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:18,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 00:55:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:19,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 00:55:19,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5843 proven. 138 refuted. 0 times theorem prover too weak. 6031 trivial. 0 not checked. [2023-12-21 00:55:19,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:55:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 93 proven. 138 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-12-21 00:55:19,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:19,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72983132] [2023-12-21 00:55:19,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:19,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818408334] [2023-12-21 00:55:19,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818408334] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:55:19,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:55:19,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-21 00:55:19,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542445781] [2023-12-21 00:55:19,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:55:19,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 00:55:19,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:19,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 00:55:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:55:19,706 INFO L87 Difference]: Start difference. First operand 1919 states and 3024 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-12-21 00:55:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:20,246 INFO L93 Difference]: Finished difference Result 3537 states and 5521 transitions. [2023-12-21 00:55:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 00:55:20,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) Word has length 533 [2023-12-21 00:55:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:20,260 INFO L225 Difference]: With dead ends: 3537 [2023-12-21 00:55:20,260 INFO L226 Difference]: Without dead ends: 1619 [2023-12-21 00:55:20,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1068 GetRequests, 1058 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-21 00:55:20,265 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 618 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:20,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 764 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 00:55:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2023-12-21 00:55:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1527. [2023-12-21 00:55:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1194 states have (on average 1.4556113902847572) internal successors, (1738), 1194 states have internal predecessors, (1738), 312 states have call successors, (312), 20 states have call predecessors, (312), 20 states have return successors, (312), 312 states have call predecessors, (312), 312 states have call successors, (312) [2023-12-21 00:55:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2362 transitions. [2023-12-21 00:55:20,437 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2362 transitions. Word has length 533 [2023-12-21 00:55:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:20,438 INFO L495 AbstractCegarLoop]: Abstraction has 1527 states and 2362 transitions. [2023-12-21 00:55:20,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-12-21 00:55:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2362 transitions. [2023-12-21 00:55:20,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:55:20,443 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:20,443 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:20,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:20,654 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 [2023-12-21 00:55:20,655 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:20,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:20,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1813086849, now seen corresponding path program 1 times [2023-12-21 00:55:20,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:20,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958046246] [2023-12-21 00:55:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:20,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:20,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:20,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723685117] [2023-12-21 00:55:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:20,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:20,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:20,717 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) [2023-12-21 00:55:20,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 00:55:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:21,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 00:55:21,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6063 proven. 108 refuted. 0 times theorem prover too weak. 5841 trivial. 0 not checked. [2023-12-21 00:55:22,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:55:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 123 proven. 108 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-12-21 00:55:22,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:22,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958046246] [2023-12-21 00:55:22,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:22,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723685117] [2023-12-21 00:55:22,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723685117] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:55:22,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:55:22,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-21 00:55:22,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491180858] [2023-12-21 00:55:22,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:55:22,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 00:55:22,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:22,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 00:55:22,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-12-21 00:55:22,608 INFO L87 Difference]: Start difference. First operand 1527 states and 2362 transitions. Second operand has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 13 states have internal predecessors, (190), 3 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 3 states have call predecessors, (156), 3 states have call successors, (156) [2023-12-21 00:55:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:24,233 INFO L93 Difference]: Finished difference Result 5471 states and 8456 transitions. [2023-12-21 00:55:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 00:55:24,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 13 states have internal predecessors, (190), 3 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 3 states have call predecessors, (156), 3 states have call successors, (156) Word has length 534 [2023-12-21 00:55:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:24,249 INFO L225 Difference]: With dead ends: 5471 [2023-12-21 00:55:24,250 INFO L226 Difference]: Without dead ends: 3945 [2023-12-21 00:55:24,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 1055 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2023-12-21 00:55:24,256 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 1000 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:24,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 2458 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-21 00:55:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2023-12-21 00:55:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 1551. [2023-12-21 00:55:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1214 states have (on average 1.4481054365733115) internal successors, (1758), 1214 states have internal predecessors, (1758), 312 states have call successors, (312), 24 states have call predecessors, (312), 24 states have return successors, (312), 312 states have call predecessors, (312), 312 states have call successors, (312) [2023-12-21 00:55:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2382 transitions. [2023-12-21 00:55:24,518 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2382 transitions. Word has length 534 [2023-12-21 00:55:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:24,519 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 2382 transitions. [2023-12-21 00:55:24,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 13 states have internal predecessors, (190), 3 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 3 states have call predecessors, (156), 3 states have call successors, (156) [2023-12-21 00:55:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2382 transitions. [2023-12-21 00:55:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:55:24,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:24,525 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:24,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:24,734 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 [2023-12-21 00:55:24,735 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:24,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:24,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1042353283, now seen corresponding path program 1 times [2023-12-21 00:55:24,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:24,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625058823] [2023-12-21 00:55:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:24,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:24,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:24,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161985215] [2023-12-21 00:55:24,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:24,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:24,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:24,801 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) [2023-12-21 00:55:24,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 00:55:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:25,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 00:55:25,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 4823 proven. 168 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2023-12-21 00:55:25,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:55:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 63 proven. 168 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-12-21 00:55:26,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:26,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625058823] [2023-12-21 00:55:26,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:26,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161985215] [2023-12-21 00:55:26,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161985215] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:55:26,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:55:26,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-21 00:55:26,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19012894] [2023-12-21 00:55:26,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:55:26,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 00:55:26,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 00:55:26,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-12-21 00:55:26,081 INFO L87 Difference]: Start difference. First operand 1551 states and 2382 transitions. Second operand has 14 states, 14 states have (on average 15.571428571428571) internal successors, (218), 14 states have internal predecessors, (218), 3 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 3 states have call predecessors, (135), 3 states have call successors, (135) [2023-12-21 00:55:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:27,742 INFO L93 Difference]: Finished difference Result 6683 states and 10228 transitions. [2023-12-21 00:55:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 00:55:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 15.571428571428571) internal successors, (218), 14 states have internal predecessors, (218), 3 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 3 states have call predecessors, (135), 3 states have call successors, (135) Word has length 534 [2023-12-21 00:55:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:27,754 INFO L225 Difference]: With dead ends: 6683 [2023-12-21 00:55:27,755 INFO L226 Difference]: Without dead ends: 5133 [2023-12-21 00:55:27,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1056 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=785, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 00:55:27,760 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 2390 mSDsluCounter, 2587 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2411 SdHoareTripleChecker+Valid, 3053 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:27,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2411 Valid, 3053 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 00:55:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2023-12-21 00:55:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 3283. [2023-12-21 00:55:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3283 states, 2594 states have (on average 1.441017733230532) internal successors, (3738), 2594 states have internal predecessors, (3738), 624 states have call successors, (624), 64 states have call predecessors, (624), 64 states have return successors, (624), 624 states have call predecessors, (624), 624 states have call successors, (624) [2023-12-21 00:55:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3283 states to 3283 states and 4986 transitions. [2023-12-21 00:55:28,161 INFO L78 Accepts]: Start accepts. Automaton has 3283 states and 4986 transitions. Word has length 534 [2023-12-21 00:55:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:28,162 INFO L495 AbstractCegarLoop]: Abstraction has 3283 states and 4986 transitions. [2023-12-21 00:55:28,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.571428571428571) internal successors, (218), 14 states have internal predecessors, (218), 3 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 3 states have call predecessors, (135), 3 states have call successors, (135) [2023-12-21 00:55:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3283 states and 4986 transitions. [2023-12-21 00:55:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:55:28,167 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:28,167 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:28,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:28,377 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 [2023-12-21 00:55:28,378 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:28,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash -866104507, now seen corresponding path program 1 times [2023-12-21 00:55:28,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:28,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521385345] [2023-12-21 00:55:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:28,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:28,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:28,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367869546] [2023-12-21 00:55:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:28,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:28,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:28,447 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) [2023-12-21 00:55:28,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 00:55:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:28,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 00:55:28,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:29,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:55:29,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:29,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521385345] [2023-12-21 00:55:29,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:29,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367869546] [2023-12-21 00:55:29,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367869546] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:55:29,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:55:29,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 00:55:29,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602908751] [2023-12-21 00:55:29,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:29,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 00:55:29,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:29,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 00:55:29,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-21 00:55:29,102 INFO L87 Difference]: Start difference. First operand 3283 states and 4986 transitions. Second operand has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:30,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:30,632 INFO L93 Difference]: Finished difference Result 13432 states and 20183 transitions. [2023-12-21 00:55:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 00:55:30,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 534 [2023-12-21 00:55:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:30,656 INFO L225 Difference]: With dead ends: 13432 [2023-12-21 00:55:30,657 INFO L226 Difference]: Without dead ends: 9414 [2023-12-21 00:55:30,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-12-21 00:55:30,666 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 1597 mSDsluCounter, 2070 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 2713 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:30,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1597 Valid, 2713 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 00:55:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9414 states. [2023-12-21 00:55:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9414 to 6747. [2023-12-21 00:55:31,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6747 states, 5362 states have (on average 1.4371503170458784) internal successors, (7706), 5362 states have internal predecessors, (7706), 1248 states have call successors, (1248), 136 states have call predecessors, (1248), 136 states have return successors, (1248), 1248 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-12-21 00:55:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6747 states to 6747 states and 10202 transitions. [2023-12-21 00:55:31,446 INFO L78 Accepts]: Start accepts. Automaton has 6747 states and 10202 transitions. Word has length 534 [2023-12-21 00:55:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:31,447 INFO L495 AbstractCegarLoop]: Abstraction has 6747 states and 10202 transitions. [2023-12-21 00:55:31,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 6747 states and 10202 transitions. [2023-12-21 00:55:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:55:31,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:31,453 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:31,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:31,662 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 [2023-12-21 00:55:31,662 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:31,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:31,663 INFO L85 PathProgramCache]: Analyzing trace with hash 87927361, now seen corresponding path program 1 times [2023-12-21 00:55:31,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:31,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000208462] [2023-12-21 00:55:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:31,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:31,712 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:31,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893768074] [2023-12-21 00:55:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:31,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:31,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:31,714 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) [2023-12-21 00:55:31,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 00:55:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:32,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 00:55:32,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 3731 proven. 42 refuted. 0 times theorem prover too weak. 8239 trivial. 0 not checked. [2023-12-21 00:55:32,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:55:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 189 proven. 42 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-12-21 00:55:33,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000208462] [2023-12-21 00:55:33,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893768074] [2023-12-21 00:55:33,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893768074] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:55:33,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:55:33,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-12-21 00:55:33,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301669372] [2023-12-21 00:55:33,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:55:33,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 00:55:33,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:33,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 00:55:33,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-21 00:55:33,270 INFO L87 Difference]: Start difference. First operand 6747 states and 10202 transitions. Second operand has 12 states, 12 states have (on average 17.416666666666668) internal successors, (209), 12 states have internal predecessors, (209), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) [2023-12-21 00:55:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:35,445 INFO L93 Difference]: Finished difference Result 16213 states and 24609 transitions. [2023-12-21 00:55:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 00:55:35,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.416666666666668) internal successors, (209), 12 states have internal predecessors, (209), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) Word has length 534 [2023-12-21 00:55:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:35,468 INFO L225 Difference]: With dead ends: 16213 [2023-12-21 00:55:35,468 INFO L226 Difference]: Without dead ends: 9467 [2023-12-21 00:55:35,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 1058 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2023-12-21 00:55:35,481 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 1127 mSDsluCounter, 1900 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:35,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 2212 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 00:55:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9467 states. [2023-12-21 00:55:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9467 to 6910. [2023-12-21 00:55:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6910 states, 5438 states have (on average 1.4310408238322914) internal successors, (7782), 5438 states have internal predecessors, (7782), 1326 states have call successors, (1326), 145 states have call predecessors, (1326), 145 states have return successors, (1326), 1326 states have call predecessors, (1326), 1326 states have call successors, (1326) [2023-12-21 00:55:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6910 states to 6910 states and 10434 transitions. [2023-12-21 00:55:36,327 INFO L78 Accepts]: Start accepts. Automaton has 6910 states and 10434 transitions. Word has length 534 [2023-12-21 00:55:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:36,328 INFO L495 AbstractCegarLoop]: Abstraction has 6910 states and 10434 transitions. [2023-12-21 00:55:36,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.416666666666668) internal successors, (209), 12 states have internal predecessors, (209), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) [2023-12-21 00:55:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6910 states and 10434 transitions. [2023-12-21 00:55:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:55:36,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:36,334 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:36,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:36,544 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 [2023-12-21 00:55:36,545 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:36,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1651405663, now seen corresponding path program 1 times [2023-12-21 00:55:36,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:36,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926247421] [2023-12-21 00:55:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:36,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:36,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:36,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350242156] [2023-12-21 00:55:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:36,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:36,604 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) [2023-12-21 00:55:36,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 00:55:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:37,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 00:55:37,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5870 proven. 168 refuted. 0 times theorem prover too weak. 5974 trivial. 0 not checked. [2023-12-21 00:55:38,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:55:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 288 proven. 171 refuted. 0 times theorem prover too weak. 11553 trivial. 0 not checked. [2023-12-21 00:55:38,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:38,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926247421] [2023-12-21 00:55:38,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350242156] [2023-12-21 00:55:38,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350242156] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:55:38,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:55:38,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-12-21 00:55:38,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522407868] [2023-12-21 00:55:38,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:55:38,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 00:55:38,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:38,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 00:55:38,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-12-21 00:55:38,591 INFO L87 Difference]: Start difference. First operand 6910 states and 10434 transitions. Second operand has 20 states, 19 states have (on average 12.263157894736842) internal successors, (233), 20 states have internal predecessors, (233), 7 states have call successors, (133), 4 states have call predecessors, (133), 7 states have return successors, (133), 5 states have call predecessors, (133), 7 states have call successors, (133) [2023-12-21 00:55:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:40,436 INFO L93 Difference]: Finished difference Result 13928 states and 20856 transitions. [2023-12-21 00:55:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 00:55:40,437 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 12.263157894736842) internal successors, (233), 20 states have internal predecessors, (233), 7 states have call successors, (133), 4 states have call predecessors, (133), 7 states have return successors, (133), 5 states have call predecessors, (133), 7 states have call successors, (133) Word has length 534 [2023-12-21 00:55:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:40,448 INFO L225 Difference]: With dead ends: 13928 [2023-12-21 00:55:40,448 INFO L226 Difference]: Without dead ends: 7182 [2023-12-21 00:55:40,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1049 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 00:55:40,459 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1579 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:40,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1579 Valid, 1348 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-21 00:55:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2023-12-21 00:55:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 7114. [2023-12-21 00:55:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 5591 states have (on average 1.404936505097478) internal successors, (7855), 5591 states have internal predecessors, (7855), 1326 states have call successors, (1326), 196 states have call predecessors, (1326), 196 states have return successors, (1326), 1326 states have call predecessors, (1326), 1326 states have call successors, (1326) [2023-12-21 00:55:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 10507 transitions. [2023-12-21 00:55:41,230 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 10507 transitions. Word has length 534 [2023-12-21 00:55:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:41,231 INFO L495 AbstractCegarLoop]: Abstraction has 7114 states and 10507 transitions. [2023-12-21 00:55:41,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 12.263157894736842) internal successors, (233), 20 states have internal predecessors, (233), 7 states have call successors, (133), 4 states have call predecessors, (133), 7 states have return successors, (133), 5 states have call predecessors, (133), 7 states have call successors, (133) [2023-12-21 00:55:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 10507 transitions. [2023-12-21 00:55:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:55:41,236 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:41,237 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:41,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:41,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:41,447 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:41,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1705798561, now seen corresponding path program 1 times [2023-12-21 00:55:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:41,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289328589] [2023-12-21 00:55:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:41,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:41,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:41,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675878048] [2023-12-21 00:55:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:41,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:41,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:41,498 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:41,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 00:55:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:42,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 00:55:42,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 3071 proven. 390 refuted. 0 times theorem prover too weak. 8551 trivial. 0 not checked. [2023-12-21 00:55:43,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:55:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:43,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289328589] [2023-12-21 00:55:43,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:43,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675878048] [2023-12-21 00:55:43,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675878048] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 00:55:43,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 00:55:43,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-12-21 00:55:43,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254416110] [2023-12-21 00:55:43,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:43,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 00:55:43,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 00:55:43,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-21 00:55:43,601 INFO L87 Difference]: Start difference. First operand 7114 states and 10507 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:44,593 INFO L93 Difference]: Finished difference Result 19600 states and 29006 transitions. [2023-12-21 00:55:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 00:55:44,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 534 [2023-12-21 00:55:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:44,614 INFO L225 Difference]: With dead ends: 19600 [2023-12-21 00:55:44,614 INFO L226 Difference]: Without dead ends: 12662 [2023-12-21 00:55:44,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1057 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-21 00:55:44,625 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 259 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:44,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1168 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 00:55:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2023-12-21 00:55:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 11618. [2023-12-21 00:55:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11618 states, 9887 states have (on average 1.4377465358551633) internal successors, (14215), 9903 states have internal predecessors, (14215), 1502 states have call successors, (1502), 228 states have call predecessors, (1502), 228 states have return successors, (1502), 1486 states have call predecessors, (1502), 1502 states have call successors, (1502) [2023-12-21 00:55:45,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11618 states to 11618 states and 17219 transitions. [2023-12-21 00:55:45,571 INFO L78 Accepts]: Start accepts. Automaton has 11618 states and 17219 transitions. Word has length 534 [2023-12-21 00:55:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:45,572 INFO L495 AbstractCegarLoop]: Abstraction has 11618 states and 17219 transitions. [2023-12-21 00:55:45,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11618 states and 17219 transitions. [2023-12-21 00:55:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:55:45,580 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:45,581 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:45,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:45,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:45,791 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:45,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1283096735, now seen corresponding path program 1 times [2023-12-21 00:55:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:45,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086651597] [2023-12-21 00:55:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:45,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:45,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:45,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318632942] [2023-12-21 00:55:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:45,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:45,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:45,840 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:45,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 00:55:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:46,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 00:55:46,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 3003 proven. 198 refuted. 0 times theorem prover too weak. 8811 trivial. 0 not checked. [2023-12-21 00:55:46,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:55:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-12-21 00:55:47,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:55:47,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086651597] [2023-12-21 00:55:47,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:55:47,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318632942] [2023-12-21 00:55:47,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318632942] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 00:55:47,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 00:55:47,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-21 00:55:47,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030939687] [2023-12-21 00:55:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:55:47,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:55:47,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:55:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:55:47,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:55:47,245 INFO L87 Difference]: Start difference. First operand 11618 states and 17219 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:55:48,264 INFO L93 Difference]: Finished difference Result 24222 states and 35771 transitions. [2023-12-21 00:55:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:55:48,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 534 [2023-12-21 00:55:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:55:48,286 INFO L225 Difference]: With dead ends: 24222 [2023-12-21 00:55:48,286 INFO L226 Difference]: Without dead ends: 11356 [2023-12-21 00:55:48,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1061 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:55:48,303 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 118 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 00:55:48,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 757 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 00:55:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11356 states. [2023-12-21 00:55:49,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11356 to 9322. [2023-12-21 00:55:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9322 states, 7765 states have (on average 1.412105602060528) internal successors, (10965), 7765 states have internal predecessors, (10965), 1326 states have call successors, (1326), 230 states have call predecessors, (1326), 230 states have return successors, (1326), 1326 states have call predecessors, (1326), 1326 states have call successors, (1326) [2023-12-21 00:55:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9322 states to 9322 states and 13617 transitions. [2023-12-21 00:55:49,157 INFO L78 Accepts]: Start accepts. Automaton has 9322 states and 13617 transitions. Word has length 534 [2023-12-21 00:55:49,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:55:49,158 INFO L495 AbstractCegarLoop]: Abstraction has 9322 states and 13617 transitions. [2023-12-21 00:55:49,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-12-21 00:55:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 9322 states and 13617 transitions. [2023-12-21 00:55:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:55:49,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:55:49,164 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:55:49,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-21 00:55:49,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:49,367 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:55:49,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:55:49,367 INFO L85 PathProgramCache]: Analyzing trace with hash -829779555, now seen corresponding path program 1 times [2023-12-21 00:55:49,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:55:49,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598163071] [2023-12-21 00:55:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:49,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:55:49,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:55:49,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35996393] [2023-12-21 00:55:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:55:49,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:55:49,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:55:49,420 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:55:49,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 00:55:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:55:50,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-21 00:55:50,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:55:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 7988 proven. 651 refuted. 0 times theorem prover too weak. 3373 trivial. 0 not checked. [2023-12-21 00:55:52,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:56:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 402 proven. 504 refuted. 0 times theorem prover too weak. 11106 trivial. 0 not checked. [2023-12-21 00:56:00,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:56:00,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598163071] [2023-12-21 00:56:00,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:56:00,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35996393] [2023-12-21 00:56:00,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35996393] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:56:00,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:56:00,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2023-12-21 00:56:00,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938473412] [2023-12-21 00:56:00,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:56:00,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-21 00:56:00,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:56:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-21 00:56:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2023-12-21 00:56:00,386 INFO L87 Difference]: Start difference. First operand 9322 states and 13617 transitions. Second operand has 32 states, 30 states have (on average 8.9) internal successors, (267), 28 states have internal predecessors, (267), 10 states have call successors, (137), 6 states have call predecessors, (137), 13 states have return successors, (138), 10 states have call predecessors, (138), 10 states have call successors, (138) [2023-12-21 00:56:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:56:10,139 INFO L93 Difference]: Finished difference Result 24210 states and 35053 transitions. [2023-12-21 00:56:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-12-21 00:56:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 8.9) internal successors, (267), 28 states have internal predecessors, (267), 10 states have call successors, (137), 6 states have call predecessors, (137), 13 states have return successors, (138), 10 states have call predecessors, (138), 10 states have call successors, (138) Word has length 534 [2023-12-21 00:56:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:56:10,161 INFO L225 Difference]: With dead ends: 24210 [2023-12-21 00:56:10,162 INFO L226 Difference]: Without dead ends: 15072 [2023-12-21 00:56:10,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1044 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3831 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2545, Invalid=8796, Unknown=1, NotChecked=0, Total=11342 [2023-12-21 00:56:10,177 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 6325 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 1524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6342 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 4304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1524 IncrementalHoareTripleChecker+Valid, 2780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-21 00:56:10,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6342 Valid, 2956 Invalid, 4304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1524 Valid, 2780 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-21 00:56:10,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15072 states. [2023-12-21 00:56:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15072 to 9738. [2023-12-21 00:56:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9738 states, 8113 states have (on average 1.3954147664242573) internal successors, (11321), 8113 states have internal predecessors, (11321), 1326 states have call successors, (1326), 298 states have call predecessors, (1326), 298 states have return successors, (1326), 1326 states have call predecessors, (1326), 1326 states have call successors, (1326) [2023-12-21 00:56:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9738 states to 9738 states and 13973 transitions. [2023-12-21 00:56:11,236 INFO L78 Accepts]: Start accepts. Automaton has 9738 states and 13973 transitions. Word has length 534 [2023-12-21 00:56:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:56:11,237 INFO L495 AbstractCegarLoop]: Abstraction has 9738 states and 13973 transitions. [2023-12-21 00:56:11,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 8.9) internal successors, (267), 28 states have internal predecessors, (267), 10 states have call successors, (137), 6 states have call predecessors, (137), 13 states have return successors, (138), 10 states have call predecessors, (138), 10 states have call successors, (138) [2023-12-21 00:56:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 9738 states and 13973 transitions. [2023-12-21 00:56:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:56:11,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:56:11,243 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:56:11,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-21 00:56:11,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:56:11,454 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:56:11,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:56:11,454 INFO L85 PathProgramCache]: Analyzing trace with hash -764993818, now seen corresponding path program 1 times [2023-12-21 00:56:11,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:56:11,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781496104] [2023-12-21 00:56:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:56:11,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:56:11,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:56:11,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131995788] [2023-12-21 00:56:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:56:11,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:56:11,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:56:11,504 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:56:11,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 00:56:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:56:12,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 00:56:12,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:56:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 9092 proven. 366 refuted. 0 times theorem prover too weak. 2554 trivial. 0 not checked. [2023-12-21 00:56:13,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:56:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 477 proven. 207 refuted. 0 times theorem prover too weak. 11328 trivial. 0 not checked. [2023-12-21 00:56:14,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:56:14,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781496104] [2023-12-21 00:56:14,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:56:14,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131995788] [2023-12-21 00:56:14,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131995788] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:56:14,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:56:14,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-12-21 00:56:14,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721711430] [2023-12-21 00:56:14,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:56:14,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 00:56:14,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:56:14,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 00:56:14,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-12-21 00:56:14,457 INFO L87 Difference]: Start difference. First operand 9738 states and 13973 transitions. Second operand has 28 states, 28 states have (on average 10.821428571428571) internal successors, (303), 28 states have internal predecessors, (303), 9 states have call successors, (137), 6 states have call predecessors, (137), 13 states have return successors, (138), 9 states have call predecessors, (138), 9 states have call successors, (138) [2023-12-21 00:56:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:56:19,565 INFO L93 Difference]: Finished difference Result 24286 states and 33942 transitions. [2023-12-21 00:56:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-21 00:56:19,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 10.821428571428571) internal successors, (303), 28 states have internal predecessors, (303), 9 states have call successors, (137), 6 states have call predecessors, (137), 13 states have return successors, (138), 9 states have call predecessors, (138), 9 states have call successors, (138) Word has length 534 [2023-12-21 00:56:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:56:19,594 INFO L225 Difference]: With dead ends: 24286 [2023-12-21 00:56:19,595 INFO L226 Difference]: Without dead ends: 14748 [2023-12-21 00:56:19,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1125 GetRequests, 1044 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1772, Invalid=5034, Unknown=0, NotChecked=0, Total=6806 [2023-12-21 00:56:19,612 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 1630 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 2804 mSolverCounterSat, 1320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 4124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1320 IncrementalHoareTripleChecker+Valid, 2804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-21 00:56:19,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 2229 Invalid, 4124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1320 Valid, 2804 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-21 00:56:19,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14748 states. [2023-12-21 00:56:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14748 to 13434. [2023-12-21 00:56:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13434 states, 10501 states have (on average 1.3359680030473289) internal successors, (14029), 10517 states have internal predecessors, (14029), 2302 states have call successors, (2302), 630 states have call predecessors, (2302), 630 states have return successors, (2302), 2286 states have call predecessors, (2302), 2302 states have call successors, (2302) [2023-12-21 00:56:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13434 states to 13434 states and 18633 transitions. [2023-12-21 00:56:21,250 INFO L78 Accepts]: Start accepts. Automaton has 13434 states and 18633 transitions. Word has length 534 [2023-12-21 00:56:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:56:21,251 INFO L495 AbstractCegarLoop]: Abstraction has 13434 states and 18633 transitions. [2023-12-21 00:56:21,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.821428571428571) internal successors, (303), 28 states have internal predecessors, (303), 9 states have call successors, (137), 6 states have call predecessors, (137), 13 states have return successors, (138), 9 states have call predecessors, (138), 9 states have call successors, (138) [2023-12-21 00:56:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 13434 states and 18633 transitions. [2023-12-21 00:56:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:56:21,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:56:21,256 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:56:21,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-21 00:56:21,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-21 00:56:21,457 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:56:21,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:56:21,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2044857496, now seen corresponding path program 1 times [2023-12-21 00:56:21,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:56:21,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813194256] [2023-12-21 00:56:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:56:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:56:21,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:56:21,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271044118] [2023-12-21 00:56:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:56:21,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:56:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:56:21,507 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:56:21,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-21 00:56:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:56:26,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 00:56:26,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:56:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 8957 proven. 363 refuted. 0 times theorem prover too weak. 2692 trivial. 0 not checked. [2023-12-21 00:56:28,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:56:34,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:56:34,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813194256] [2023-12-21 00:56:34,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:56:34,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271044118] [2023-12-21 00:56:34,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271044118] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 00:56:34,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 00:56:34,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-21 00:56:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553327647] [2023-12-21 00:56:34,407 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 00:56:34,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 00:56:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:56:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 00:56:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-12-21 00:56:34,409 INFO L87 Difference]: Start difference. First operand 13434 states and 18633 transitions. Second operand has 16 states, 16 states have (on average 10.6875) internal successors, (171), 15 states have internal predecessors, (171), 5 states have call successors, (78), 5 states have call predecessors, (78), 9 states have return successors, (78), 5 states have call predecessors, (78), 5 states have call successors, (78) [2023-12-21 00:56:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:56:37,828 INFO L93 Difference]: Finished difference Result 29274 states and 40814 transitions. [2023-12-21 00:56:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 00:56:37,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.6875) internal successors, (171), 15 states have internal predecessors, (171), 5 states have call successors, (78), 5 states have call predecessors, (78), 9 states have return successors, (78), 5 states have call predecessors, (78), 5 states have call successors, (78) Word has length 534 [2023-12-21 00:56:37,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:56:37,855 INFO L225 Difference]: With dead ends: 29274 [2023-12-21 00:56:37,855 INFO L226 Difference]: Without dead ends: 16056 [2023-12-21 00:56:37,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=343, Invalid=917, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 00:56:37,871 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 477 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 00:56:37,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 1570 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 00:56:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16056 states. [2023-12-21 00:56:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16056 to 13443. [2023-12-21 00:56:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13443 states, 10508 states have (on average 1.3357441948991244) internal successors, (14036), 10524 states have internal predecessors, (14036), 2302 states have call successors, (2302), 632 states have call predecessors, (2302), 632 states have return successors, (2302), 2286 states have call predecessors, (2302), 2302 states have call successors, (2302) [2023-12-21 00:56:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13443 states to 13443 states and 18640 transitions. [2023-12-21 00:56:39,536 INFO L78 Accepts]: Start accepts. Automaton has 13443 states and 18640 transitions. Word has length 534 [2023-12-21 00:56:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:56:39,537 INFO L495 AbstractCegarLoop]: Abstraction has 13443 states and 18640 transitions. [2023-12-21 00:56:39,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.6875) internal successors, (171), 15 states have internal predecessors, (171), 5 states have call successors, (78), 5 states have call predecessors, (78), 9 states have return successors, (78), 5 states have call predecessors, (78), 5 states have call successors, (78) [2023-12-21 00:56:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 13443 states and 18640 transitions. [2023-12-21 00:56:39,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2023-12-21 00:56:39,544 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:56:39,544 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:56:39,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-21 00:56:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-21 00:56:39,745 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:56:39,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:56:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash 631134886, now seen corresponding path program 1 times [2023-12-21 00:56:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:56:39,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821304758] [2023-12-21 00:56:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:56:39,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:56:39,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:56:39,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983430748] [2023-12-21 00:56:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:56:39,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:56:39,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:56:39,796 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:56:39,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-21 00:56:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:56:50,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-21 00:56:50,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:57:30,114 WARN L293 SmtUtils]: Spent 21.31s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:58:01,927 WARN L293 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 00:59:00,988 WARN L293 SmtUtils]: Spent 7.56s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:59:15,856 WARN L293 SmtUtils]: Spent 5.10s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 01:00:32,510 WARN L293 SmtUtils]: Spent 6.56s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 01:00:47,030 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 01:02:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 8563 proven. 825 refuted. 0 times theorem prover too weak. 2624 trivial. 0 not checked. [2023-12-21 01:02:51,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 01:03:26,925 WARN L293 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 62 DAG size of output: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 01:04:26,630 WARN L293 SmtUtils]: Spent 8.63s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 01:05:13,116 WARN L293 SmtUtils]: Spent 15.63s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 01:05:43,095 WARN L854 $PredicateComparison]: unable to prove that (or (= (mod c_~var_1_25~0 256) 0) (let ((.cse0 (mod c_~var_1_102~0 65536))) (let ((.cse2 (forall ((v_~var_1_40~0_21 Int) (~var_1_5~0 Int)) (or (< .cse0 (+ 1 (mod (+ (* c_~var_1_60~0 ~var_1_5~0) (* 4294967295 c_~var_1_20~0 ~var_1_5~0)) 4294967296))) (< ~var_1_5~0 (+ (mod v_~var_1_40~0_21 c_~var_1_7~0) 1)) (< v_~var_1_40~0_21 0) (< 0 (+ (* ~var_1_5~0 100) 1 c_~var_1_7~0)) (< v_~var_1_40~0_21 c_~var_1_20~0))))) (and (or (< c_~var_1_7~0 0) (and (forall ((v_~var_1_40~0_21 Int) (~var_1_5~0 Int)) (let ((.cse1 (mod v_~var_1_40~0_21 c_~var_1_7~0))) (or (< .cse0 (+ 1 (mod (+ (* c_~var_1_60~0 ~var_1_5~0) (* 4294967295 c_~var_1_20~0 ~var_1_5~0)) 4294967296))) (< 0 (+ v_~var_1_40~0_21 1)) (< 0 (+ (* ~var_1_5~0 100) 1 c_~var_1_7~0)) (< v_~var_1_40~0_21 c_~var_1_20~0) (< (+ ~var_1_5~0 c_~var_1_7~0) (+ .cse1 1)) (= .cse1 0)))) .cse2)) (or (and (or (forall ((~var_1_5~0 Int)) (or (< ~var_1_5~0 1) (< .cse0 (+ 1 (mod (+ (* c_~var_1_60~0 ~var_1_5~0) (* 4294967295 c_~var_1_20~0 ~var_1_5~0)) 4294967296))) (< 0 (+ (* ~var_1_5~0 100) 1 c_~var_1_7~0)))) (forall ((v_~var_1_40~0_21 Int)) (or (not (= (mod v_~var_1_40~0_21 c_~var_1_7~0) 0)) (< v_~var_1_40~0_21 c_~var_1_20~0)))) (forall ((v_~var_1_40~0_21 Int) (~var_1_5~0 Int)) (let ((.cse3 (mod v_~var_1_40~0_21 c_~var_1_7~0))) (or (< ~var_1_5~0 (+ .cse3 1 c_~var_1_7~0)) (< .cse0 (+ 1 (mod (+ (* c_~var_1_60~0 ~var_1_5~0) (* 4294967295 c_~var_1_20~0 ~var_1_5~0)) 4294967296))) (< 0 (+ v_~var_1_40~0_21 1)) (< 0 (+ (* ~var_1_5~0 100) 1 c_~var_1_7~0)) (< v_~var_1_40~0_21 c_~var_1_20~0) (= .cse3 0)))) .cse2) (< 0 (+ 1 c_~var_1_7~0)))))) (= (mod (+ c_~var_1_60~0 (* 4294967295 c_~var_1_20~0)) 4294967296) (mod c_~var_1_15~0 256))) is different from false [2023-12-21 01:06:26,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 01:06:26,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821304758] [2023-12-21 01:06:26,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 01:06:26,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983430748] [2023-12-21 01:06:26,909 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-12-21 01:06:26,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 139 [2023-12-21 01:06:26,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-21 01:06:27,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-21 01:06:27,110 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:915) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:789) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:579) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 45 more [2023-12-21 01:06:27,114 INFO L158 Benchmark]: Toolchain (without parser) took 691816.57ms. Allocated memory was 200.3MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 154.6MB in the beginning and 1.1GB in the end (delta: -924.7MB). Peak memory consumption was 414.0MB. Max. memory is 8.0GB. [2023-12-21 01:06:27,114 INFO L158 Benchmark]: CDTParser took 0.69ms. Allocated memory is still 200.3MB. Free memory is still 157.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 01:06:27,114 INFO L158 Benchmark]: CACSL2BoogieTranslator took 628.99ms. Allocated memory is still 200.3MB. Free memory was 154.6MB in the beginning and 117.9MB in the end (delta: 36.7MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. [2023-12-21 01:06:27,115 INFO L158 Benchmark]: Boogie Procedure Inliner took 151.69ms. Allocated memory is still 200.3MB. Free memory was 117.9MB in the beginning and 102.2MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-21 01:06:27,115 INFO L158 Benchmark]: Boogie Preprocessor took 188.39ms. Allocated memory is still 200.3MB. Free memory was 102.2MB in the beginning and 145.2MB in the end (delta: -43.0MB). Peak memory consumption was 20.4MB. Max. memory is 8.0GB. [2023-12-21 01:06:27,116 INFO L158 Benchmark]: RCFGBuilder took 1155.38ms. Allocated memory was 200.3MB in the beginning and 272.6MB in the end (delta: 72.4MB). Free memory was 145.2MB in the beginning and 219.2MB in the end (delta: -74.0MB). Peak memory consumption was 86.4MB. Max. memory is 8.0GB. [2023-12-21 01:06:27,116 INFO L158 Benchmark]: TraceAbstraction took 689686.96ms. Allocated memory was 272.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 218.7MB in the beginning and 1.1GB in the end (delta: -860.6MB). Peak memory consumption was 404.7MB. Max. memory is 8.0GB. [2023-12-21 01:06:27,117 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69ms. Allocated memory is still 200.3MB. Free memory is still 157.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 628.99ms. Allocated memory is still 200.3MB. Free memory was 154.6MB in the beginning and 117.9MB in the end (delta: 36.7MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 151.69ms. Allocated memory is still 200.3MB. Free memory was 117.9MB in the beginning and 102.2MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 188.39ms. Allocated memory is still 200.3MB. Free memory was 102.2MB in the beginning and 145.2MB in the end (delta: -43.0MB). Peak memory consumption was 20.4MB. Max. memory is 8.0GB. * RCFGBuilder took 1155.38ms. Allocated memory was 200.3MB in the beginning and 272.6MB in the end (delta: 72.4MB). Free memory was 145.2MB in the beginning and 219.2MB in the end (delta: -74.0MB). Peak memory consumption was 86.4MB. Max. memory is 8.0GB. * TraceAbstraction took 689686.96ms. Allocated memory was 272.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 218.7MB in the beginning and 1.1GB in the end (delta: -860.6MB). Peak memory consumption was 404.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...