/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-97.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 21:23:41,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 21:23:41,456 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 21:23:41,459 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 21:23:41,459 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 21:23:41,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 21:23:41,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 21:23:41,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 21:23:41,474 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 21:23:41,474 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 21:23:41,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 21:23:41,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 21:23:41,475 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 21:23:41,475 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 21:23:41,476 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 21:23:41,476 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 21:23:41,476 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 21:23:41,476 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 21:23:41,476 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 21:23:41,477 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 21:23:41,477 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 21:23:41,477 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 21:23:41,477 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 21:23:41,477 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 21:23:41,478 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 21:23:41,478 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 21:23:41,478 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 21:23:41,478 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 21:23:41,478 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 21:23:41,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 21:23:41,479 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 21:23:41,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 21:23:41,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:23:41,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 21:23:41,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 21:23:41,480 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 21:23:41,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 21:23:41,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 21:23:41,480 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 21:23:41,480 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 21:23:41,480 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 21:23:41,480 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 21:23:41,480 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 21:23:41,480 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 21:23:41,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 21:23:41,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 21:23:41,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 21:23:41,633 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 21:23:41,633 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 21:23:41,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-97.i [2023-12-15 21:23:42,611 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 21:23:42,841 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 21:23:42,842 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-97.i [2023-12-15 21:23:42,855 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c415c763/d9d5a52d64a94b03a6e04107217a4a4e/FLAG50826bb61 [2023-12-15 21:23:42,866 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c415c763/d9d5a52d64a94b03a6e04107217a4a4e [2023-12-15 21:23:42,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 21:23:42,869 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 21:23:42,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 21:23:42,869 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 21:23:42,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 21:23:42,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:23:42" (1/1) ... [2023-12-15 21:23:42,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a15a8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:42, skipping insertion in model container [2023-12-15 21:23:42,879 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:23:42" (1/1) ... [2023-12-15 21:23:42,922 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 21:23:43,040 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-97.i[916,929] [2023-12-15 21:23:43,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:23:43,238 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 21:23:43,246 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-97.i[916,929] [2023-12-15 21:23:43,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:23:43,332 INFO L206 MainTranslator]: Completed translation [2023-12-15 21:23:43,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43 WrapperNode [2023-12-15 21:23:43,332 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 21:23:43,333 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 21:23:43,333 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 21:23:43,333 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 21:23:43,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,367 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,454 INFO L138 Inliner]: procedures = 26, calls = 85, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 803 [2023-12-15 21:23:43,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 21:23:43,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 21:23:43,455 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 21:23:43,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 21:23:43,463 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,476 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,532 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]. [2023-12-15 21:23:43,532 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,532 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,577 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,598 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,623 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,639 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 21:23:43,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 21:23:43,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 21:23:43,641 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 21:23:43,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (1/1) ... [2023-12-15 21:23:43,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:23:43,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:43,697 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) [2023-12-15 21:23:43,727 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 [2023-12-15 21:23:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 21:23:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 21:23:43,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 21:23:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 21:23:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 21:23:43,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 21:23:43,918 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 21:23:43,920 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 21:23:44,757 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 21:23:44,820 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 21:23:44,820 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 21:23:44,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:23:44 BoogieIcfgContainer [2023-12-15 21:23:44,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 21:23:44,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 21:23:44,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 21:23:44,824 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 21:23:44,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:23:42" (1/3) ... [2023-12-15 21:23:44,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b311a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:23:44, skipping insertion in model container [2023-12-15 21:23:44,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:23:43" (2/3) ... [2023-12-15 21:23:44,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b311a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:23:44, skipping insertion in model container [2023-12-15 21:23:44,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:23:44" (3/3) ... [2023-12-15 21:23:44,826 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-97.i [2023-12-15 21:23:44,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 21:23:44,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 21:23:44,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 21:23:44,880 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;@4f5817cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 21:23:44,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 21:23:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 224 states have (on average 1.6160714285714286) internal successors, (362), 225 states have internal predecessors, (362), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-12-15 21:23:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-12-15 21:23:44,902 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:44,903 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:44,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:44,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:44,908 INFO L85 PathProgramCache]: Analyzing trace with hash 864953944, now seen corresponding path program 1 times [2023-12-15 21:23:44,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:44,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70281240] [2023-12-15 21:23:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:44,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:45,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70281240] [2023-12-15 21:23:45,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 21:23:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898426423] [2023-12-15 21:23:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:45,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:45,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:45,114 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) [2023-12-15 21:23:45,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 21:23:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:45,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 21:23:45,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2023-12-15 21:23:45,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:45,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898426423] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:45,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:45,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 21:23:45,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417516454] [2023-12-15 21:23:45,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:45,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 21:23:45,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 21:23:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:23:45,524 INFO L87 Difference]: Start difference. First operand has 299 states, 224 states have (on average 1.6160714285714286) internal successors, (362), 225 states have internal predecessors, (362), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-12-15 21:23:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:45,583 INFO L93 Difference]: Finished difference Result 595 states and 1082 transitions. [2023-12-15 21:23:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 21:23:45,585 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) Word has length 499 [2023-12-15 21:23:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:45,593 INFO L225 Difference]: With dead ends: 595 [2023-12-15 21:23:45,593 INFO L226 Difference]: Without dead ends: 297 [2023-12-15 21:23:45,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 21:23:45,599 INFO L413 NwaCegarLoop]: 495 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, 495 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 [2023-12-15 21:23:45,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 495 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:23:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-12-15 21:23:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2023-12-15 21:23:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 223 states have (on average 1.5874439461883407) internal successors, (354), 223 states have internal predecessors, (354), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-12-15 21:23:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 498 transitions. [2023-12-15 21:23:45,673 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 498 transitions. Word has length 499 [2023-12-15 21:23:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:45,673 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 498 transitions. [2023-12-15 21:23:45,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-12-15 21:23:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 498 transitions. [2023-12-15 21:23:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-12-15 21:23:45,681 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:45,681 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:45,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:45,888 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 [2023-12-15 21:23:45,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:45,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:45,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2068244440, now seen corresponding path program 1 times [2023-12-15 21:23:45,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:45,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859800852] [2023-12-15 21:23:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:45,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:45,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:45,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162836720] [2023-12-15 21:23:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:45,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:45,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:45,983 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) [2023-12-15 21:23:46,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 21:23:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:46,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-15 21:23:46,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-15 21:23:46,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:46,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859800852] [2023-12-15 21:23:46,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:46,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162836720] [2023-12-15 21:23:46,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162836720] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:46,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:46,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:23:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88392908] [2023-12-15 21:23:46,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:46,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:23:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:23:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:46,386 INFO L87 Difference]: Start difference. First operand 297 states and 498 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:23:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:46,527 INFO L93 Difference]: Finished difference Result 764 states and 1280 transitions. [2023-12-15 21:23:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:23:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 499 [2023-12-15 21:23:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:46,538 INFO L225 Difference]: With dead ends: 764 [2023-12-15 21:23:46,538 INFO L226 Difference]: Without dead ends: 468 [2023-12-15 21:23:46,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:23:46,545 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 256 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:46,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1013 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:23:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-12-15 21:23:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 465. [2023-12-15 21:23:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 368 states have (on average 1.6032608695652173) internal successors, (590), 369 states have internal predecessors, (590), 94 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2023-12-15 21:23:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 778 transitions. [2023-12-15 21:23:46,600 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 778 transitions. Word has length 499 [2023-12-15 21:23:46,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:46,602 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 778 transitions. [2023-12-15 21:23:46,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:23:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 778 transitions. [2023-12-15 21:23:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-12-15 21:23:46,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:46,613 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:46,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:46,820 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 [2023-12-15 21:23:46,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:46,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash -287560810, now seen corresponding path program 1 times [2023-12-15 21:23:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:46,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352111735] [2023-12-15 21:23:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:46,909 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:46,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174506049] [2023-12-15 21:23:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:46,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:46,916 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) [2023-12-15 21:23:46,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 21:23:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:47,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:23:47,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-15 21:23:47,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:47,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:47,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352111735] [2023-12-15 21:23:47,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:47,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174506049] [2023-12-15 21:23:47,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174506049] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:47,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:47,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:23:47,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714581735] [2023-12-15 21:23:47,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:47,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:23:47,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:23:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:47,249 INFO L87 Difference]: Start difference. First operand 465 states and 778 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:23:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:47,708 INFO L93 Difference]: Finished difference Result 2038 states and 3394 transitions. [2023-12-15 21:23:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:23:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 499 [2023-12-15 21:23:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:47,715 INFO L225 Difference]: With dead ends: 2038 [2023-12-15 21:23:47,715 INFO L226 Difference]: Without dead ends: 1574 [2023-12-15 21:23:47,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:23:47,717 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 878 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:47,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 1625 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 21:23:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2023-12-15 21:23:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1566. [2023-12-15 21:23:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1273 states have (on average 1.5993715632364494) internal successors, (2036), 1279 states have internal predecessors, (2036), 284 states have call successors, (284), 8 states have call predecessors, (284), 8 states have return successors, (284), 278 states have call predecessors, (284), 284 states have call successors, (284) [2023-12-15 21:23:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2604 transitions. [2023-12-15 21:23:47,782 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2604 transitions. Word has length 499 [2023-12-15 21:23:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:47,783 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 2604 transitions. [2023-12-15 21:23:47,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:23:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2604 transitions. [2023-12-15 21:23:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-12-15 21:23:47,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:47,787 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:47,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:47,994 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 [2023-12-15 21:23:47,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:47,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:47,995 INFO L85 PathProgramCache]: Analyzing trace with hash -12801196, now seen corresponding path program 1 times [2023-12-15 21:23:47,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:47,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024896061] [2023-12-15 21:23:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:47,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:48,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:48,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867868063] [2023-12-15 21:23:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:48,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:48,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:48,069 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) [2023-12-15 21:23:48,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 21:23:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:48,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:48,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4427 proven. 147 refuted. 0 times theorem prover too weak. 5650 trivial. 0 not checked. [2023-12-15 21:23:48,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 66 proven. 147 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-15 21:23:49,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:49,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024896061] [2023-12-15 21:23:49,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:49,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867868063] [2023-12-15 21:23:49,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867868063] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:49,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:49,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:23:49,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468383382] [2023-12-15 21:23:49,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:49,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:23:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:49,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:23:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:49,026 INFO L87 Difference]: Start difference. First operand 1566 states and 2604 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-12-15 21:23:49,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:49,369 INFO L93 Difference]: Finished difference Result 2511 states and 4164 transitions. [2023-12-15 21:23:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:23:49,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) Word has length 499 [2023-12-15 21:23:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:49,374 INFO L225 Difference]: With dead ends: 2511 [2023-12-15 21:23:49,374 INFO L226 Difference]: Without dead ends: 946 [2023-12-15 21:23:49,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 990 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:49,377 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 615 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:49,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1054 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-12-15 21:23:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 938. [2023-12-15 21:23:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 733 states have (on average 1.5702592087312415) internal successors, (1151), 735 states have internal predecessors, (1151), 196 states have call successors, (196), 8 states have call predecessors, (196), 8 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-12-15 21:23:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1543 transitions. [2023-12-15 21:23:49,431 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1543 transitions. Word has length 499 [2023-12-15 21:23:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:49,431 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1543 transitions. [2023-12-15 21:23:49,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-12-15 21:23:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1543 transitions. [2023-12-15 21:23:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-12-15 21:23:49,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:49,436 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:49,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-15 21:23:49,643 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 [2023-12-15 21:23:49,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:49,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1674529174, now seen corresponding path program 1 times [2023-12-15 21:23:49,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:49,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989170734] [2023-12-15 21:23:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:49,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:49,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:49,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801778639] [2023-12-15 21:23:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:49,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:49,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:49,690 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) [2023-12-15 21:23:49,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 21:23:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:49,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:49,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4631 proven. 141 refuted. 0 times theorem prover too weak. 5452 trivial. 0 not checked. [2023-12-15 21:23:50,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 72 proven. 141 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-15 21:23:50,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:50,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989170734] [2023-12-15 21:23:50,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:50,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801778639] [2023-12-15 21:23:50,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801778639] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:50,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:50,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-15 21:23:50,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748886243] [2023-12-15 21:23:50,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:50,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:23:50,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:50,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:23:50,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:23:50,647 INFO L87 Difference]: Start difference. First operand 938 states and 1543 transitions. Second operand has 8 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-12-15 21:23:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:50,965 INFO L93 Difference]: Finished difference Result 1899 states and 3105 transitions. [2023-12-15 21:23:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:23:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) Word has length 501 [2023-12-15 21:23:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:50,970 INFO L225 Difference]: With dead ends: 1899 [2023-12-15 21:23:50,970 INFO L226 Difference]: Without dead ends: 962 [2023-12-15 21:23:50,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 994 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:23:50,972 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 507 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:50,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1028 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:23:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2023-12-15 21:23:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 954. [2023-12-15 21:23:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 745 states have (on average 1.5355704697986576) internal successors, (1144), 747 states have internal predecessors, (1144), 196 states have call successors, (196), 12 states have call predecessors, (196), 12 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-12-15 21:23:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1536 transitions. [2023-12-15 21:23:51,015 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1536 transitions. Word has length 501 [2023-12-15 21:23:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:51,016 INFO L495 AbstractCegarLoop]: Abstraction has 954 states and 1536 transitions. [2023-12-15 21:23:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-12-15 21:23:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1536 transitions. [2023-12-15 21:23:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-12-15 21:23:51,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:51,019 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:51,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-15 21:23:51,227 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 [2023-12-15 21:23:51,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:51,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash -175616658, now seen corresponding path program 1 times [2023-12-15 21:23:51,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:51,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626355097] [2023-12-15 21:23:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:51,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:51,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:51,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192577088] [2023-12-15 21:23:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:51,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:51,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:51,275 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) [2023-12-15 21:23:51,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 21:23:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:51,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:51,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5183 proven. 105 refuted. 0 times theorem prover too weak. 4936 trivial. 0 not checked. [2023-12-15 21:23:51,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 108 proven. 105 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-15 21:23:52,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:52,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626355097] [2023-12-15 21:23:52,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:52,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192577088] [2023-12-15 21:23:52,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192577088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:52,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:52,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:23:52,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817487856] [2023-12-15 21:23:52,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:52,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:23:52,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:52,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:23:52,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:52,056 INFO L87 Difference]: Start difference. First operand 954 states and 1536 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, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-12-15 21:23:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:52,455 INFO L93 Difference]: Finished difference Result 1923 states and 3085 transitions. [2023-12-15 21:23:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:23:52,456 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, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) Word has length 502 [2023-12-15 21:23:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:52,459 INFO L225 Difference]: With dead ends: 1923 [2023-12-15 21:23:52,459 INFO L226 Difference]: Without dead ends: 970 [2023-12-15 21:23:52,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 996 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:52,462 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 872 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:52,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1043 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2023-12-15 21:23:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 962. [2023-12-15 21:23:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 751 states have (on average 1.5246338215712383) internal successors, (1145), 753 states have internal predecessors, (1145), 196 states have call successors, (196), 14 states have call predecessors, (196), 14 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-12-15 21:23:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1537 transitions. [2023-12-15 21:23:52,504 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1537 transitions. Word has length 502 [2023-12-15 21:23:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:52,504 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 1537 transitions. [2023-12-15 21:23:52,505 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, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-12-15 21:23:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1537 transitions. [2023-12-15 21:23:52,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-12-15 21:23:52,507 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:52,508 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:52,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:52,714 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 [2023-12-15 21:23:52,714 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:52,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:52,715 INFO L85 PathProgramCache]: Analyzing trace with hash 190629636, now seen corresponding path program 1 times [2023-12-15 21:23:52,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:52,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055565161] [2023-12-15 21:23:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:52,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:52,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:52,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14402042] [2023-12-15 21:23:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:52,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:52,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:52,780 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) [2023-12-15 21:23:52,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 21:23:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:53,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 21:23:53,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-15 21:23:53,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:23:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055565161] [2023-12-15 21:23:53,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14402042] [2023-12-15 21:23:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14402042] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:23:53,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:23:53,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:23:53,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838024384] [2023-12-15 21:23:53,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:23:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:23:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:23:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:53,186 INFO L87 Difference]: Start difference. First operand 962 states and 1537 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, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:23:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:53,452 INFO L93 Difference]: Finished difference Result 2912 states and 4643 transitions. [2023-12-15 21:23:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:23:53,453 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, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 504 [2023-12-15 21:23:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:53,463 INFO L225 Difference]: With dead ends: 2912 [2023-12-15 21:23:53,463 INFO L226 Difference]: Without dead ends: 1951 [2023-12-15 21:23:53,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:23:53,467 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 446 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:53,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1349 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:23:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2023-12-15 21:23:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1839. [2023-12-15 21:23:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1416 states have (on average 1.5070621468926553) internal successors, (2134), 1422 states have internal predecessors, (2134), 392 states have call successors, (392), 30 states have call predecessors, (392), 30 states have return successors, (392), 386 states have call predecessors, (392), 392 states have call successors, (392) [2023-12-15 21:23:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2918 transitions. [2023-12-15 21:23:53,584 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2918 transitions. Word has length 504 [2023-12-15 21:23:53,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:53,584 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 2918 transitions. [2023-12-15 21:23:53,584 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, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:23:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2918 transitions. [2023-12-15 21:23:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-12-15 21:23:53,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:53,588 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:53,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:53,794 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 [2023-12-15 21:23:53,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:53,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:53,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1576833030, now seen corresponding path program 1 times [2023-12-15 21:23:53,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:53,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963785720] [2023-12-15 21:23:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:53,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:53,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:53,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769233131] [2023-12-15 21:23:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:53,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:53,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:53,852 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) [2023-12-15 21:23:53,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 21:23:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:54,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:54,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5163 proven. 99 refuted. 0 times theorem prover too weak. 4962 trivial. 0 not checked. [2023-12-15 21:23:54,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 114 proven. 99 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-15 21:23:54,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:54,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963785720] [2023-12-15 21:23:54,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:54,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769233131] [2023-12-15 21:23:54,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769233131] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:54,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:54,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-15 21:23:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334579604] [2023-12-15 21:23:54,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:54,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:23:54,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:23:54,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:23:54,571 INFO L87 Difference]: Start difference. First operand 1839 states and 2918 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-12-15 21:23:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:55,131 INFO L93 Difference]: Finished difference Result 3789 states and 5977 transitions. [2023-12-15 21:23:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:23:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) Word has length 504 [2023-12-15 21:23:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:55,138 INFO L225 Difference]: With dead ends: 3789 [2023-12-15 21:23:55,138 INFO L226 Difference]: Without dead ends: 1951 [2023-12-15 21:23:55,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 1000 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:23:55,142 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 639 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:55,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1189 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:23:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2023-12-15 21:23:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1928. [2023-12-15 21:23:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1459 states have (on average 1.485263879369431) internal successors, (2167), 1466 states have internal predecessors, (2167), 430 states have call successors, (430), 38 states have call predecessors, (430), 38 states have return successors, (430), 423 states have call predecessors, (430), 430 states have call successors, (430) [2023-12-15 21:23:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 3027 transitions. [2023-12-15 21:23:55,311 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 3027 transitions. Word has length 504 [2023-12-15 21:23:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:55,312 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 3027 transitions. [2023-12-15 21:23:55,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-12-15 21:23:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 3027 transitions. [2023-12-15 21:23:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-12-15 21:23:55,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:55,316 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:55,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:55,522 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 [2023-12-15 21:23:55,523 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:55,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash -841651448, now seen corresponding path program 1 times [2023-12-15 21:23:55,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:55,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974143594] [2023-12-15 21:23:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:55,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:55,561 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:55,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534593864] [2023-12-15 21:23:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:55,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:55,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:55,576 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) [2023-12-15 21:23:55,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 21:23:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:55,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:55,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3851 proven. 51 refuted. 0 times theorem prover too weak. 6322 trivial. 0 not checked. [2023-12-15 21:23:56,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 162 proven. 51 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-15 21:23:56,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974143594] [2023-12-15 21:23:56,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534593864] [2023-12-15 21:23:56,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534593864] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:56,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:56,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-15 21:23:56,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000631920] [2023-12-15 21:23:56,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:56,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:23:56,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:56,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:23:56,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:23:56,285 INFO L87 Difference]: Start difference. First operand 1928 states and 3027 transitions. Second operand has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2023-12-15 21:23:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:56,665 INFO L93 Difference]: Finished difference Result 3820 states and 5980 transitions. [2023-12-15 21:23:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:23:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) Word has length 504 [2023-12-15 21:23:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:56,673 INFO L225 Difference]: With dead ends: 3820 [2023-12-15 21:23:56,673 INFO L226 Difference]: Without dead ends: 1966 [2023-12-15 21:23:56,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:23:56,681 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 794 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:56,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 1043 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2023-12-15 21:23:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1944. [2023-12-15 21:23:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1471 states have (on average 1.470428280081577) internal successors, (2163), 1478 states have internal predecessors, (2163), 430 states have call successors, (430), 42 states have call predecessors, (430), 42 states have return successors, (430), 423 states have call predecessors, (430), 430 states have call successors, (430) [2023-12-15 21:23:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 3023 transitions. [2023-12-15 21:23:56,827 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 3023 transitions. Word has length 504 [2023-12-15 21:23:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:56,828 INFO L495 AbstractCegarLoop]: Abstraction has 1944 states and 3023 transitions. [2023-12-15 21:23:56,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2023-12-15 21:23:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 3023 transitions. [2023-12-15 21:23:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-12-15 21:23:56,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:56,831 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:56,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-15 21:23:57,038 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 [2023-12-15 21:23:57,038 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:57,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash -120698157, now seen corresponding path program 1 times [2023-12-15 21:23:57,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:57,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780474123] [2023-12-15 21:23:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:57,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:57,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:57,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766415208] [2023-12-15 21:23:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:57,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:57,098 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) [2023-12-15 21:23:57,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 21:23:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:57,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 21:23:57,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2531 proven. 183 refuted. 0 times theorem prover too weak. 7510 trivial. 0 not checked. [2023-12-15 21:23:57,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:23:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 30 proven. 183 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-15 21:23:58,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:23:58,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780474123] [2023-12-15 21:23:58,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:23:58,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766415208] [2023-12-15 21:23:58,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766415208] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:23:58,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:23:58,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-15 21:23:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988729417] [2023-12-15 21:23:58,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:23:58,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:23:58,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:23:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:23:58,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:23:58,204 INFO L87 Difference]: Start difference. First operand 1944 states and 3023 transitions. Second operand has 8 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2023-12-15 21:23:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:23:58,633 INFO L93 Difference]: Finished difference Result 3872 states and 5987 transitions. [2023-12-15 21:23:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:23:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) Word has length 505 [2023-12-15 21:23:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:23:58,640 INFO L225 Difference]: With dead ends: 3872 [2023-12-15 21:23:58,640 INFO L226 Difference]: Without dead ends: 2002 [2023-12-15 21:23:58,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:23:58,643 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 269 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:23:58,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1025 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:23:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2023-12-15 21:23:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1980. [2023-12-15 21:23:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1498 states have (on average 1.4566088117489986) internal successors, (2182), 1505 states have internal predecessors, (2182), 430 states have call successors, (430), 51 states have call predecessors, (430), 51 states have return successors, (430), 423 states have call predecessors, (430), 430 states have call successors, (430) [2023-12-15 21:23:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3042 transitions. [2023-12-15 21:23:58,756 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3042 transitions. Word has length 505 [2023-12-15 21:23:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:23:58,757 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 3042 transitions. [2023-12-15 21:23:58,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2023-12-15 21:23:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3042 transitions. [2023-12-15 21:23:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-12-15 21:23:58,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:23:58,761 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:23:58,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 21:23:58,967 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 [2023-12-15 21:23:58,967 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:23:58,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:23:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 313030929, now seen corresponding path program 1 times [2023-12-15 21:23:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:23:58,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863728970] [2023-12-15 21:23:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:58,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:23:59,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:23:59,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735219602] [2023-12-15 21:23:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:23:59,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:23:59,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:23:59,021 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) [2023-12-15 21:23:59,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 21:23:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:23:59,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 21:23:59,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:23:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4127 proven. 57 refuted. 0 times theorem prover too weak. 6040 trivial. 0 not checked. [2023-12-15 21:23:59,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 156 proven. 57 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-15 21:24:00,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:00,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863728970] [2023-12-15 21:24:00,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:00,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735219602] [2023-12-15 21:24:00,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735219602] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:24:00,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:24:00,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-15 21:24:00,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700847158] [2023-12-15 21:24:00,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:00,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 21:24:00,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:00,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 21:24:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-15 21:24:00,236 INFO L87 Difference]: Start difference. First operand 1980 states and 3042 transitions. Second operand has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-12-15 21:24:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:02,300 INFO L93 Difference]: Finished difference Result 10074 states and 15468 transitions. [2023-12-15 21:24:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 21:24:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) Word has length 505 [2023-12-15 21:24:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:02,324 INFO L225 Difference]: With dead ends: 10074 [2023-12-15 21:24:02,324 INFO L226 Difference]: Without dead ends: 8172 [2023-12-15 21:24:02,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-12-15 21:24:02,330 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 5069 mSDsluCounter, 3655 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5140 SdHoareTripleChecker+Valid, 4155 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:02,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5140 Valid, 4155 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-15 21:24:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2023-12-15 21:24:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 6580. [2023-12-15 21:24:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 5203 states have (on average 1.4543532577359215) internal successors, (7567), 5223 states have internal predecessors, (7567), 1226 states have call successors, (1226), 150 states have call predecessors, (1226), 150 states have return successors, (1226), 1206 states have call predecessors, (1226), 1226 states have call successors, (1226) [2023-12-15 21:24:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 10019 transitions. [2023-12-15 21:24:02,727 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 10019 transitions. Word has length 505 [2023-12-15 21:24:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:02,727 INFO L495 AbstractCegarLoop]: Abstraction has 6580 states and 10019 transitions. [2023-12-15 21:24:02,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-12-15 21:24:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 10019 transitions. [2023-12-15 21:24:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-12-15 21:24:02,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:02,732 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:02,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:02,939 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 [2023-12-15 21:24:02,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:02,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:02,940 INFO L85 PathProgramCache]: Analyzing trace with hash -857720303, now seen corresponding path program 1 times [2023-12-15 21:24:02,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:02,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304541699] [2023-12-15 21:24:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:02,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:02,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388044756] [2023-12-15 21:24:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:02,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:02,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:02,979 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) [2023-12-15 21:24:03,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 21:24:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:03,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-15 21:24:03,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5408 proven. 93 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2023-12-15 21:24:03,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 327 proven. 96 refuted. 0 times theorem prover too weak. 9801 trivial. 0 not checked. [2023-12-15 21:24:04,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:04,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304541699] [2023-12-15 21:24:04,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:04,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388044756] [2023-12-15 21:24:04,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388044756] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:24:04,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:24:04,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-12-15 21:24:04,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848137325] [2023-12-15 21:24:04,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:04,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 21:24:04,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:04,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 21:24:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-12-15 21:24:04,611 INFO L87 Difference]: Start difference. First operand 6580 states and 10019 transitions. Second operand has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-12-15 21:24:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:05,707 INFO L93 Difference]: Finished difference Result 18549 states and 28176 transitions. [2023-12-15 21:24:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-15 21:24:05,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) Word has length 505 [2023-12-15 21:24:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:05,736 INFO L225 Difference]: With dead ends: 18549 [2023-12-15 21:24:05,736 INFO L226 Difference]: Without dead ends: 12047 [2023-12-15 21:24:05,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 993 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2023-12-15 21:24:05,787 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 823 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:05,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 1632 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:24:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12047 states. [2023-12-15 21:24:06,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12047 to 11881. [2023-12-15 21:24:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11881 states, 9828 states have (on average 1.455942205942206) internal successors, (14309), 9872 states have internal predecessors, (14309), 1802 states have call successors, (1802), 250 states have call predecessors, (1802), 250 states have return successors, (1802), 1758 states have call predecessors, (1802), 1802 states have call successors, (1802) [2023-12-15 21:24:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11881 states to 11881 states and 17913 transitions. [2023-12-15 21:24:06,401 INFO L78 Accepts]: Start accepts. Automaton has 11881 states and 17913 transitions. Word has length 505 [2023-12-15 21:24:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:06,403 INFO L495 AbstractCegarLoop]: Abstraction has 11881 states and 17913 transitions. [2023-12-15 21:24:06,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-12-15 21:24:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 11881 states and 17913 transitions. [2023-12-15 21:24:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-12-15 21:24:06,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:06,411 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:06,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-15 21:24:06,617 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 [2023-12-15 21:24:06,617 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:06,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:06,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1367193393, now seen corresponding path program 1 times [2023-12-15 21:24:06,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:06,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399800291] [2023-12-15 21:24:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:06,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:06,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:06,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688144826] [2023-12-15 21:24:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:06,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:06,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:06,651 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) [2023-12-15 21:24:06,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 21:24:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:07,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-15 21:24:07,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-15 21:24:07,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:24:07,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:07,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399800291] [2023-12-15 21:24:07,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:07,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688144826] [2023-12-15 21:24:07,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688144826] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:24:07,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:24:07,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 21:24:07,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870836943] [2023-12-15 21:24:07,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:24:07,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:24:07,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:24:07,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:24:07,429 INFO L87 Difference]: Start difference. First operand 11881 states and 17913 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:24:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:10,059 INFO L93 Difference]: Finished difference Result 53556 states and 80867 transitions. [2023-12-15 21:24:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:24:10,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 505 [2023-12-15 21:24:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:10,129 INFO L225 Difference]: With dead ends: 53556 [2023-12-15 21:24:10,129 INFO L226 Difference]: Without dead ends: 41753 [2023-12-15 21:24:10,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-15 21:24:10,149 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 1976 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1976 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:10,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1976 Valid, 2476 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 21:24:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41753 states. [2023-12-15 21:24:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41753 to 29367. [2023-12-15 21:24:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29367 states, 25846 states have (on average 1.5028631122804303) internal successors, (38843), 25944 states have internal predecessors, (38843), 3086 states have call successors, (3086), 434 states have call predecessors, (3086), 434 states have return successors, (3086), 2988 states have call predecessors, (3086), 3086 states have call successors, (3086) [2023-12-15 21:24:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29367 states to 29367 states and 45015 transitions. [2023-12-15 21:24:11,538 INFO L78 Accepts]: Start accepts. Automaton has 29367 states and 45015 transitions. Word has length 505 [2023-12-15 21:24:11,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:11,539 INFO L495 AbstractCegarLoop]: Abstraction has 29367 states and 45015 transitions. [2023-12-15 21:24:11,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:24:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 29367 states and 45015 transitions. [2023-12-15 21:24:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-12-15 21:24:11,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:11,576 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:11,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:11,776 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 [2023-12-15 21:24:11,777 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:11,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash 233877713, now seen corresponding path program 1 times [2023-12-15 21:24:11,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:11,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423935115] [2023-12-15 21:24:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:11,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:11,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:11,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578920795] [2023-12-15 21:24:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:11,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:11,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:11,811 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) [2023-12-15 21:24:11,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 21:24:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:12,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 21:24:12,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-15 21:24:12,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:24:12,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:12,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423935115] [2023-12-15 21:24:12,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:12,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578920795] [2023-12-15 21:24:12,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578920795] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:24:12,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:24:12,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:24:12,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132927515] [2023-12-15 21:24:12,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:24:12,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:24:12,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:24:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:24:12,344 INFO L87 Difference]: Start difference. First operand 29367 states and 45015 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:24:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:14,850 INFO L93 Difference]: Finished difference Result 68933 states and 104570 transitions. [2023-12-15 21:24:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:24:14,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 505 [2023-12-15 21:24:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:14,927 INFO L225 Difference]: With dead ends: 68933 [2023-12-15 21:24:14,927 INFO L226 Difference]: Without dead ends: 39644 [2023-12-15 21:24:14,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:24:14,953 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 1224 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:14,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 2498 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 21:24:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39644 states. [2023-12-15 21:24:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39644 to 23512. [2023-12-15 21:24:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23512 states, 20683 states have (on average 1.5050524585408307) internal successors, (31129), 20755 states have internal predecessors, (31129), 2454 states have call successors, (2454), 374 states have call predecessors, (2454), 374 states have return successors, (2454), 2382 states have call predecessors, (2454), 2454 states have call successors, (2454) [2023-12-15 21:24:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23512 states to 23512 states and 36037 transitions. [2023-12-15 21:24:16,084 INFO L78 Accepts]: Start accepts. Automaton has 23512 states and 36037 transitions. Word has length 505 [2023-12-15 21:24:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:16,085 INFO L495 AbstractCegarLoop]: Abstraction has 23512 states and 36037 transitions. [2023-12-15 21:24:16,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:24:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 23512 states and 36037 transitions. [2023-12-15 21:24:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-12-15 21:24:16,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:16,094 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:16,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:16,302 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 [2023-12-15 21:24:16,303 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:16,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash -336152495, now seen corresponding path program 1 times [2023-12-15 21:24:16,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:16,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727001132] [2023-12-15 21:24:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:16,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:16,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:16,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772524287] [2023-12-15 21:24:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:16,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:16,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:16,363 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) [2023-12-15 21:24:16,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 21:24:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:16,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 21:24:16,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-15 21:24:16,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:24:16,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:16,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727001132] [2023-12-15 21:24:16,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:16,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772524287] [2023-12-15 21:24:16,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772524287] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:24:16,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:24:16,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:24:16,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969322971] [2023-12-15 21:24:16,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:24:16,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:24:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:16,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:24:16,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:24:16,844 INFO L87 Difference]: Start difference. First operand 23512 states and 36037 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:24:19,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:19,524 INFO L93 Difference]: Finished difference Result 75005 states and 114560 transitions. [2023-12-15 21:24:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:24:19,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 505 [2023-12-15 21:24:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:19,660 INFO L225 Difference]: With dead ends: 75005 [2023-12-15 21:24:19,660 INFO L226 Difference]: Without dead ends: 51571 [2023-12-15 21:24:19,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:24:19,686 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 1755 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1755 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:19,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1755 Valid, 1551 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 21:24:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51571 states. [2023-12-15 21:24:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51571 to 35972. [2023-12-15 21:24:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35972 states, 32395 states have (on average 1.5176416113597777) internal successors, (49164), 32501 states have internal predecessors, (49164), 3134 states have call successors, (3134), 442 states have call predecessors, (3134), 442 states have return successors, (3134), 3028 states have call predecessors, (3134), 3134 states have call successors, (3134) [2023-12-15 21:24:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35972 states to 35972 states and 55432 transitions. [2023-12-15 21:24:21,212 INFO L78 Accepts]: Start accepts. Automaton has 35972 states and 55432 transitions. Word has length 505 [2023-12-15 21:24:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:21,213 INFO L495 AbstractCegarLoop]: Abstraction has 35972 states and 55432 transitions. [2023-12-15 21:24:21,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:24:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 35972 states and 55432 transitions. [2023-12-15 21:24:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-12-15 21:24:21,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:21,225 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:21,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:21,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-15 21:24:21,433 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:21,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:21,433 INFO L85 PathProgramCache]: Analyzing trace with hash -259251697, now seen corresponding path program 1 times [2023-12-15 21:24:21,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:21,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205253953] [2023-12-15 21:24:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:21,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:21,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:21,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996277730] [2023-12-15 21:24:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:21,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:21,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:21,486 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) [2023-12-15 21:24:21,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 21:24:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:21,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 21:24:21,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4191 proven. 153 refuted. 0 times theorem prover too weak. 5880 trivial. 0 not checked. [2023-12-15 21:24:22,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:24:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 60 proven. 153 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-12-15 21:24:22,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:22,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205253953] [2023-12-15 21:24:22,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:22,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996277730] [2023-12-15 21:24:22,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996277730] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:24:22,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:24:22,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-12-15 21:24:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473314237] [2023-12-15 21:24:22,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:24:22,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:24:22,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:22,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:24:22,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:24:22,387 INFO L87 Difference]: Start difference. First operand 35972 states and 55432 transitions. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-12-15 21:24:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:26,238 INFO L93 Difference]: Finished difference Result 95033 states and 144131 transitions. [2023-12-15 21:24:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-15 21:24:26,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) Word has length 505 [2023-12-15 21:24:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:26,342 INFO L225 Difference]: With dead ends: 95033 [2023-12-15 21:24:26,342 INFO L226 Difference]: Without dead ends: 59070 [2023-12-15 21:24:26,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1019 GetRequests, 1001 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-12-15 21:24:26,377 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 846 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:26,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 1748 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 21:24:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59070 states. [2023-12-15 21:24:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59070 to 58518. [2023-12-15 21:24:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58518 states, 51255 states have (on average 1.4688908399180567) internal successors, (75288), 51466 states have internal predecessors, (75288), 6230 states have call successors, (6230), 1032 states have call predecessors, (6230), 1032 states have return successors, (6230), 6019 states have call predecessors, (6230), 6230 states have call successors, (6230) [2023-12-15 21:24:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58518 states to 58518 states and 87748 transitions. [2023-12-15 21:24:29,362 INFO L78 Accepts]: Start accepts. Automaton has 58518 states and 87748 transitions. Word has length 505 [2023-12-15 21:24:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:29,362 INFO L495 AbstractCegarLoop]: Abstraction has 58518 states and 87748 transitions. [2023-12-15 21:24:29,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-12-15 21:24:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58518 states and 87748 transitions. [2023-12-15 21:24:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-12-15 21:24:29,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:29,379 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:29,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:29,586 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 [2023-12-15 21:24:29,586 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:29,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1858845649, now seen corresponding path program 1 times [2023-12-15 21:24:29,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:29,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281561143] [2023-12-15 21:24:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:29,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:29,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:29,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552992105] [2023-12-15 21:24:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:29,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:29,618 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) [2023-12-15 21:24:29,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 21:24:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:29,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-15 21:24:29,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-12-15 21:24:30,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 21:24:30,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:24:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281561143] [2023-12-15 21:24:30,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 21:24:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552992105] [2023-12-15 21:24:30,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552992105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:24:30,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:24:30,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:24:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523962703] [2023-12-15 21:24:30,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:24:30,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:24:30,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:24:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:24:30,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:24:30,911 INFO L87 Difference]: Start difference. First operand 58518 states and 87748 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:24:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:24:36,190 INFO L93 Difference]: Finished difference Result 143079 states and 213201 transitions. [2023-12-15 21:24:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:24:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 505 [2023-12-15 21:24:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:24:36,352 INFO L225 Difference]: With dead ends: 143079 [2023-12-15 21:24:36,353 INFO L226 Difference]: Without dead ends: 84643 [2023-12-15 21:24:36,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:24:36,407 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 2152 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:24:36,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2152 Valid, 2391 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-15 21:24:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84643 states. [2023-12-15 21:24:40,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84643 to 75619. [2023-12-15 21:24:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75619 states, 65065 states have (on average 1.4471374779067088) internal successors, (94158), 65361 states have internal predecessors, (94158), 8998 states have call successors, (8998), 1555 states have call predecessors, (8998), 1555 states have return successors, (8998), 8702 states have call predecessors, (8998), 8998 states have call successors, (8998) [2023-12-15 21:24:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75619 states to 75619 states and 112154 transitions. [2023-12-15 21:24:40,982 INFO L78 Accepts]: Start accepts. Automaton has 75619 states and 112154 transitions. Word has length 505 [2023-12-15 21:24:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:24:41,004 INFO L495 AbstractCegarLoop]: Abstraction has 75619 states and 112154 transitions. [2023-12-15 21:24:41,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-12-15 21:24:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 75619 states and 112154 transitions. [2023-12-15 21:24:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-12-15 21:24:41,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:24:41,030 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:41,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:41,230 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 [2023-12-15 21:24:41,231 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:24:41,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:24:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1935746447, now seen corresponding path program 1 times [2023-12-15 21:24:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:24:41,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873051794] [2023-12-15 21:24:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:41,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:24:41,286 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 21:24:41,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293476863] [2023-12-15 21:24:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:24:41,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:24:41,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:24:41,292 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) [2023-12-15 21:24:41,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-15 21:24:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:24:41,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-15 21:24:41,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:24:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3366 proven. 702 refuted. 0 times theorem prover too weak. 6156 trivial. 0 not checked. [2023-12-15 21:24:43,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-15 21:24:44,278 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 21:24:44,287 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:24:44,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-15 21:24:44,292 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:24:44,487 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 [2023-12-15 21:24:44,487 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 506 with TraceHistMax 72,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-5-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-5-2-1 context. [2023-12-15 21:24:44,491 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:24:44,492 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 21:24:44,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:24:44 BoogieIcfgContainer [2023-12-15 21:24:44,494 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 21:24:44,494 INFO L158 Benchmark]: Toolchain (without parser) took 61625.53ms. Allocated memory was 206.6MB in the beginning and 4.7GB in the end (delta: 4.5GB). Free memory was 145.5MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2023-12-15 21:24:44,494 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 206.6MB. Free memory is still 159.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 21:24:44,494 INFO L158 Benchmark]: CACSL2BoogieTranslator took 463.24ms. Allocated memory was 206.6MB in the beginning and 347.1MB in the end (delta: 140.5MB). Free memory was 145.2MB in the beginning and 297.8MB in the end (delta: -152.6MB). Peak memory consumption was 26.0MB. Max. memory is 8.0GB. [2023-12-15 21:24:44,495 INFO L158 Benchmark]: Boogie Procedure Inliner took 121.60ms. Allocated memory is still 347.1MB. Free memory was 297.8MB in the beginning and 275.7MB in the end (delta: 22.0MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2023-12-15 21:24:44,495 INFO L158 Benchmark]: Boogie Preprocessor took 184.42ms. Allocated memory is still 347.1MB. Free memory was 275.7MB in the beginning and 232.2MB in the end (delta: 43.5MB). Peak memory consumption was 44.0MB. Max. memory is 8.0GB. [2023-12-15 21:24:44,495 INFO L158 Benchmark]: RCFGBuilder took 1179.91ms. Allocated memory is still 347.1MB. Free memory was 232.2MB in the beginning and 297.3MB in the end (delta: -65.0MB). Peak memory consumption was 132.1MB. Max. memory is 8.0GB. [2023-12-15 21:24:44,495 INFO L158 Benchmark]: TraceAbstraction took 59671.68ms. Allocated memory was 347.1MB in the beginning and 4.7GB in the end (delta: 4.3GB). Free memory was 296.7MB in the beginning and 2.7GB in the end (delta: -2.4GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2023-12-15 21:24:44,496 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 206.6MB. Free memory is still 159.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 463.24ms. Allocated memory was 206.6MB in the beginning and 347.1MB in the end (delta: 140.5MB). Free memory was 145.2MB in the beginning and 297.8MB in the end (delta: -152.6MB). Peak memory consumption was 26.0MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 121.60ms. Allocated memory is still 347.1MB. Free memory was 297.8MB in the beginning and 275.7MB in the end (delta: 22.0MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 184.42ms. Allocated memory is still 347.1MB. Free memory was 275.7MB in the beginning and 232.2MB in the end (delta: 43.5MB). Peak memory consumption was 44.0MB. Max. memory is 8.0GB. * RCFGBuilder took 1179.91ms. Allocated memory is still 347.1MB. Free memory was 232.2MB in the beginning and 297.3MB in the end (delta: -65.0MB). Peak memory consumption was 132.1MB. Max. memory is 8.0GB. * TraceAbstraction took 59671.68ms. Allocated memory was 347.1MB in the beginning and 4.7GB in the end (delta: 4.3GB). Free memory was 296.7MB in the beginning and 2.7GB in the end (delta: -2.4GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was analyzing trace of length 506 with TraceHistMax 72,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-5-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-5-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 299 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 59.6s, OverallIterations: 18, TraceHistogramMax: 72, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 24.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19464 SdHoareTripleChecker+Valid, 8.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19121 mSDsluCounter, 27315 SdHoareTripleChecker+Invalid, 6.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18611 mSDsCounter, 2742 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9434 IncrementalHoareTripleChecker+Invalid, 12176 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2742 mSolverCounterUnsat, 8704 mSDtfsCounter, 9434 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13141 GetRequests, 12977 SyntacticMatches, 5 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75619occurred in iteration=17, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 55665 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 9050 NumberOfCodeBlocks, 9050 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 13055 ConstructedInterpolants, 0 QuantifiedInterpolants, 35833 SizeOfPredicates, 42 NumberOfNonLiveVariables, 21541 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 26 InterpolantComputations, 8 PerfectInterpolantSequences, 263763/265824 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown