/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-23.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 00:33:28,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 00:33:28,519 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 00:33:28,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 00:33:28,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 00:33:28,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 00:33:28,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 00:33:28,545 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 00:33:28,545 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 00:33:28,548 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 00:33:28,548 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 00:33:28,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 00:33:28,549 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 00:33:28,550 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 00:33:28,550 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 00:33:28,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 00:33:28,551 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 00:33:28,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 00:33:28,551 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 00:33:28,551 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 00:33:28,551 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 00:33:28,551 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 00:33:28,552 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 00:33:28,552 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 00:33:28,552 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 00:33:28,552 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 00:33:28,552 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 00:33:28,552 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 00:33:28,553 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 00:33:28,553 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 00:33:28,554 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 00:33:28,554 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 00:33:28,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 00:33:28,554 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 00:33:28,554 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 00:33:28,554 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 00:33:28,554 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 00:33:28,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 00:33:28,554 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 00:33:28,555 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 00:33:28,555 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 00:33:28,555 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 00:33:28,555 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 00:33:28,555 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 00:33:28,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 00:33:28,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 00:33:28,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 00:33:28,742 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 00:33:28,742 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 00:33:28,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-23.i [2023-12-21 00:33:29,839 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 00:33:30,044 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 00:33:30,044 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_operatoramount_amount500_file-23.i [2023-12-21 00:33:30,056 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9539da14b/3243d90a8937485ca6efc59db67113d6/FLAG9986ba0fc [2023-12-21 00:33:30,067 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9539da14b/3243d90a8937485ca6efc59db67113d6 [2023-12-21 00:33:30,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 00:33:30,070 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 00:33:30,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 00:33:30,071 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 00:33:30,074 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 00:33:30,074 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e592e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30, skipping insertion in model container [2023-12-21 00:33:30,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,112 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 00:33:30,206 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-23.i[916,929] [2023-12-21 00:33:30,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 00:33:30,420 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 00:33:30,428 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-23.i[916,929] [2023-12-21 00:33:30,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 00:33:30,556 INFO L206 MainTranslator]: Completed translation [2023-12-21 00:33:30,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30 WrapperNode [2023-12-21 00:33:30,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 00:33:30,557 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 00:33:30,557 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 00:33:30,557 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 00:33:30,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,590 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,696 INFO L138 Inliner]: procedures = 26, calls = 90, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 690 [2023-12-21 00:33:30,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 00:33:30,697 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 00:33:30,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 00:33:30,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 00:33:30,705 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,718 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,755 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-21 00:33:30,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,807 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 00:33:30,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 00:33:30,825 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 00:33:30,825 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 00:33:30,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (1/1) ... [2023-12-21 00:33:30,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 00:33:30,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:30,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 00:33:30,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 00:33:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 00:33:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 00:33:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 00:33:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 00:33:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 00:33:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 00:33:31,027 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 00:33:31,029 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 00:33:31,798 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 00:33:31,833 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 00:33:31,834 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 00:33:31,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:33:31 BoogieIcfgContainer [2023-12-21 00:33:31,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 00:33:31,835 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 00:33:31,835 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 00:33:31,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 00:33:31,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:33:30" (1/3) ... [2023-12-21 00:33:31,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ec3b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:33:31, skipping insertion in model container [2023-12-21 00:33:31,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:30" (2/3) ... [2023-12-21 00:33:31,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ec3b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:33:31, skipping insertion in model container [2023-12-21 00:33:31,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:33:31" (3/3) ... [2023-12-21 00:33:31,840 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-23.i [2023-12-21 00:33:31,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 00:33:31,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 00:33:31,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 00:33:31,908 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;@6e69f039, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 00:33:31,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 00:33:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 259 states, 179 states have (on average 1.547486033519553) internal successors, (277), 180 states have internal predecessors, (277), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-12-21 00:33:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-12-21 00:33:31,947 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:31,948 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:31,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:31,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1005213245, now seen corresponding path program 1 times [2023-12-21 00:33:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:31,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396611816] [2023-12-21 00:33:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:31,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:32,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396611816] [2023-12-21 00:33:32,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 00:33:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805498655] [2023-12-21 00:33:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:32,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:32,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:32,346 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:32,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 00:33:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:32,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 00:33:32,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2023-12-21 00:33:32,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:32,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805498655] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:32,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:32,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 00:33:32,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858638480] [2023-12-21 00:33:32,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:32,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 00:33:32,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:32,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 00:33:32,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 00:33:32,861 INFO L87 Difference]: Start difference. First operand has 259 states, 179 states have (on average 1.547486033519553) internal successors, (277), 180 states have internal predecessors, (277), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) Second operand has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) [2023-12-21 00:33:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:32,952 INFO L93 Difference]: Finished difference Result 515 states and 937 transitions. [2023-12-21 00:33:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 00:33:32,955 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) Word has length 521 [2023-12-21 00:33:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:32,962 INFO L225 Difference]: With dead ends: 515 [2023-12-21 00:33:32,962 INFO L226 Difference]: Without dead ends: 257 [2023-12-21 00:33:32,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 00:33:32,971 INFO L413 NwaCegarLoop]: 423 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, 423 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:32,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 423 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 00:33:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-12-21 00:33:33,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2023-12-21 00:33:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 178 states have (on average 1.5280898876404494) internal successors, (272), 178 states have internal predecessors, (272), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-12-21 00:33:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 426 transitions. [2023-12-21 00:33:33,037 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 426 transitions. Word has length 521 [2023-12-21 00:33:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:33,038 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 426 transitions. [2023-12-21 00:33:33,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.5) internal successors, (141), 2 states have internal predecessors, (141), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) [2023-12-21 00:33:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 426 transitions. [2023-12-21 00:33:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-12-21 00:33:33,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:33,046 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:33,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 00:33:33,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-21 00:33:33,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:33,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash -886706641, now seen corresponding path program 1 times [2023-12-21 00:33:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:33,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963619427] [2023-12-21 00:33:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:33,367 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:33,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584574661] [2023-12-21 00:33:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:33,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:33,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:33,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 00:33:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:33,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-21 00:33:33,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:33:45,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:45,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:45,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963619427] [2023-12-21 00:33:45,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:45,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584574661] [2023-12-21 00:33:45,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584574661] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:45,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:45,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 00:33:45,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999651922] [2023-12-21 00:33:45,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:45,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 00:33:45,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 00:33:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 00:33:45,842 INFO L87 Difference]: Start difference. First operand 257 states and 426 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:45,923 INFO L93 Difference]: Finished difference Result 517 states and 856 transitions. [2023-12-21 00:33:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 00:33:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 521 [2023-12-21 00:33:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:45,927 INFO L225 Difference]: With dead ends: 517 [2023-12-21 00:33:45,927 INFO L226 Difference]: Without dead ends: 261 [2023-12-21 00:33:45,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:33:45,929 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 3 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:45,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1257 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 00:33:45,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-12-21 00:33:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2023-12-21 00:33:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 180 states have (on average 1.5222222222222221) internal successors, (274), 180 states have internal predecessors, (274), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-12-21 00:33:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 428 transitions. [2023-12-21 00:33:45,941 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 428 transitions. Word has length 521 [2023-12-21 00:33:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:45,948 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 428 transitions. [2023-12-21 00:33:45,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 428 transitions. [2023-12-21 00:33:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-12-21 00:33:45,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:45,955 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:45,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:46,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-21 00:33:46,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:46,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -886647059, now seen corresponding path program 1 times [2023-12-21 00:33:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:46,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939401368] [2023-12-21 00:33:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:46,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:46,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:46,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755007236] [2023-12-21 00:33:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:46,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:46,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:46,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:46,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 00:33:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:46,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-21 00:33:46,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 1168 proven. 0 refuted. 0 times theorem prover too weak. 10536 trivial. 0 not checked. [2023-12-21 00:33:46,893 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:46,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:46,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939401368] [2023-12-21 00:33:46,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:46,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755007236] [2023-12-21 00:33:46,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755007236] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:46,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:46,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 00:33:46,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514715288] [2023-12-21 00:33:46,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:46,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 00:33:46,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:46,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 00:33:46,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 00:33:46,896 INFO L87 Difference]: Start difference. First operand 259 states and 428 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-12-21 00:33:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:47,149 INFO L93 Difference]: Finished difference Result 516 states and 853 transitions. [2023-12-21 00:33:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 00:33:47,150 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), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) Word has length 521 [2023-12-21 00:33:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:47,152 INFO L225 Difference]: With dead ends: 516 [2023-12-21 00:33:47,152 INFO L226 Difference]: Without dead ends: 258 [2023-12-21 00:33:47,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 00:33:47,153 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 423 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:47,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 444 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 00:33:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-21 00:33:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2023-12-21 00:33:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 179 states have (on average 1.5139664804469273) internal successors, (271), 179 states have internal predecessors, (271), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-12-21 00:33:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 425 transitions. [2023-12-21 00:33:47,165 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 425 transitions. Word has length 521 [2023-12-21 00:33:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:47,166 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 425 transitions. [2023-12-21 00:33:47,166 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), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-12-21 00:33:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 425 transitions. [2023-12-21 00:33:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-12-21 00:33:47,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:47,169 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:47,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:47,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:47,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:47,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:47,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1244491307, now seen corresponding path program 1 times [2023-12-21 00:33:47,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:47,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375652995] [2023-12-21 00:33:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:47,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:47,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902510242] [2023-12-21 00:33:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:47,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:47,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:47,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:47,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 00:33:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:47,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:33:47,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:33:47,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:47,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:47,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375652995] [2023-12-21 00:33:47,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:47,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902510242] [2023-12-21 00:33:47,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902510242] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:47,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:47,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:33:47,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239866267] [2023-12-21 00:33:47,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:47,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:33:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:33:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:47,764 INFO L87 Difference]: Start difference. First operand 258 states and 425 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:47,849 INFO L93 Difference]: Finished difference Result 669 states and 1102 transitions. [2023-12-21 00:33:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:33:47,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 521 [2023-12-21 00:33:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:47,855 INFO L225 Difference]: With dead ends: 669 [2023-12-21 00:33:47,855 INFO L226 Difference]: Without dead ends: 412 [2023-12-21 00:33:47,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:47,860 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 202 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:47,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 807 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 00:33:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-12-21 00:33:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 409. [2023-12-21 00:33:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 301 states have (on average 1.5448504983388704) internal successors, (465), 302 states have internal predecessors, (465), 105 states have call successors, (105), 2 states have call predecessors, (105), 2 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2023-12-21 00:33:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 675 transitions. [2023-12-21 00:33:47,888 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 675 transitions. Word has length 521 [2023-12-21 00:33:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:47,890 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 675 transitions. [2023-12-21 00:33:47,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 675 transitions. [2023-12-21 00:33:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-12-21 00:33:47,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:47,895 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:47,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-21 00:33:48,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:48,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:48,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:48,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1306530921, now seen corresponding path program 1 times [2023-12-21 00:33:48,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:48,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760048286] [2023-12-21 00:33:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:48,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:48,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:48,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483661246] [2023-12-21 00:33:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:48,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:48,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:48,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:48,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 00:33:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:48,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:33:48,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:33:48,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:48,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:48,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760048286] [2023-12-21 00:33:48,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:48,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483661246] [2023-12-21 00:33:48,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483661246] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:48,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:48,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:33:48,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170245738] [2023-12-21 00:33:48,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:48,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:33:48,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:33:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:48,448 INFO L87 Difference]: Start difference. First operand 409 states and 675 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:48,513 INFO L93 Difference]: Finished difference Result 1225 states and 2023 transitions. [2023-12-21 00:33:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:33:48,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 521 [2023-12-21 00:33:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:48,519 INFO L225 Difference]: With dead ends: 1225 [2023-12-21 00:33:48,520 INFO L226 Difference]: Without dead ends: 817 [2023-12-21 00:33:48,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:48,522 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 414 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:48,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 826 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 00:33:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-12-21 00:33:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 815. [2023-12-21 00:33:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 600 states have (on average 1.5366666666666666) internal successors, (922), 602 states have internal predecessors, (922), 210 states have call successors, (210), 4 states have call predecessors, (210), 4 states have return successors, (210), 208 states have call predecessors, (210), 210 states have call successors, (210) [2023-12-21 00:33:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1342 transitions. [2023-12-21 00:33:48,582 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1342 transitions. Word has length 521 [2023-12-21 00:33:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:48,582 INFO L495 AbstractCegarLoop]: Abstraction has 815 states and 1342 transitions. [2023-12-21 00:33:48,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1342 transitions. [2023-12-21 00:33:48,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-12-21 00:33:48,586 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:48,587 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:48,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:48,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:48,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:48,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:48,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1322049639, now seen corresponding path program 1 times [2023-12-21 00:33:48,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:48,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130298223] [2023-12-21 00:33:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:48,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:48,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:48,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033629787] [2023-12-21 00:33:48,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:48,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:48,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:48,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:48,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 00:33:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:49,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:33:49,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:33:49,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:49,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:49,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130298223] [2023-12-21 00:33:49,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:49,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033629787] [2023-12-21 00:33:49,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033629787] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:49,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:49,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:33:49,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954027796] [2023-12-21 00:33:49,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:49,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:33:49,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:49,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:33:49,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:49,167 INFO L87 Difference]: Start difference. First operand 815 states and 1342 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:49,388 INFO L93 Difference]: Finished difference Result 2067 states and 3407 transitions. [2023-12-21 00:33:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:33:49,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 521 [2023-12-21 00:33:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:49,393 INFO L225 Difference]: With dead ends: 2067 [2023-12-21 00:33:49,394 INFO L226 Difference]: Without dead ends: 1253 [2023-12-21 00:33:49,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:49,396 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 416 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:49,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 838 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 00:33:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2023-12-21 00:33:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 881. [2023-12-21 00:33:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 666 states have (on average 1.5465465465465464) internal successors, (1030), 668 states have internal predecessors, (1030), 210 states have call successors, (210), 4 states have call predecessors, (210), 4 states have return successors, (210), 208 states have call predecessors, (210), 210 states have call successors, (210) [2023-12-21 00:33:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1450 transitions. [2023-12-21 00:33:49,461 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1450 transitions. Word has length 521 [2023-12-21 00:33:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:49,463 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1450 transitions. [2023-12-21 00:33:49,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1450 transitions. [2023-12-21 00:33:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-12-21 00:33:49,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:49,466 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:49,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-21 00:33:49,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:49,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:49,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:49,674 INFO L85 PathProgramCache]: Analyzing trace with hash 716337063, now seen corresponding path program 1 times [2023-12-21 00:33:49,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:49,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281706109] [2023-12-21 00:33:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:49,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:49,712 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:49,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801026509] [2023-12-21 00:33:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:49,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:49,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:49,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:49,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 00:33:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:50,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:33:50,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:33:50,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:50,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281706109] [2023-12-21 00:33:50,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801026509] [2023-12-21 00:33:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801026509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:50,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:50,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:33:50,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329896060] [2023-12-21 00:33:50,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:50,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:33:50,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:33:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:50,066 INFO L87 Difference]: Start difference. First operand 881 states and 1450 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:50,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:50,147 INFO L93 Difference]: Finished difference Result 2613 states and 4298 transitions. [2023-12-21 00:33:50,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:33:50,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 521 [2023-12-21 00:33:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:50,154 INFO L225 Difference]: With dead ends: 2613 [2023-12-21 00:33:50,154 INFO L226 Difference]: Without dead ends: 1733 [2023-12-21 00:33:50,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:50,157 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 403 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:50,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1201 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 00:33:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2023-12-21 00:33:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1171. [2023-12-21 00:33:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 956 states have (on average 1.5815899581589958) internal successors, (1512), 958 states have internal predecessors, (1512), 210 states have call successors, (210), 4 states have call predecessors, (210), 4 states have return successors, (210), 208 states have call predecessors, (210), 210 states have call successors, (210) [2023-12-21 00:33:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1932 transitions. [2023-12-21 00:33:50,244 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1932 transitions. Word has length 521 [2023-12-21 00:33:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:50,244 INFO L495 AbstractCegarLoop]: Abstraction has 1171 states and 1932 transitions. [2023-12-21 00:33:50,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1932 transitions. [2023-12-21 00:33:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-12-21 00:33:50,248 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:50,248 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:50,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:50,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:50,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:50,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:50,456 INFO L85 PathProgramCache]: Analyzing trace with hash 235256805, now seen corresponding path program 1 times [2023-12-21 00:33:50,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:50,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322280681] [2023-12-21 00:33:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:50,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:50,494 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:50,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874016103] [2023-12-21 00:33:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:50,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:50,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:50,518 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:50,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 00:33:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:50,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 00:33:50,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5838 proven. 99 refuted. 0 times theorem prover too weak. 5767 trivial. 0 not checked. [2023-12-21 00:33:51,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:33:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 129 proven. 99 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-12-21 00:33:51,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:51,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322280681] [2023-12-21 00:33:51,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:51,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874016103] [2023-12-21 00:33:51,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874016103] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:33:51,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:33:51,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-21 00:33:51,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771863853] [2023-12-21 00:33:51,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:33:51,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 00:33:51,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:51,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 00:33:51,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-21 00:33:51,339 INFO L87 Difference]: Start difference. First operand 1171 states and 1932 transitions. Second operand has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 3 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 3 states have call predecessors, (111), 3 states have call successors, (111) [2023-12-21 00:33:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:51,717 INFO L93 Difference]: Finished difference Result 2357 states and 3877 transitions. [2023-12-21 00:33:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 00:33:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 3 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 3 states have call predecessors, (111), 3 states have call successors, (111) Word has length 521 [2023-12-21 00:33:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:51,722 INFO L225 Difference]: With dead ends: 2357 [2023-12-21 00:33:51,722 INFO L226 Difference]: Without dead ends: 1187 [2023-12-21 00:33:51,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1034 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-21 00:33:51,724 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 440 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:51,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 832 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 00:33:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2023-12-21 00:33:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1179. [2023-12-21 00:33:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 962 states have (on average 1.5654885654885655) internal successors, (1506), 964 states have internal predecessors, (1506), 210 states have call successors, (210), 6 states have call predecessors, (210), 6 states have return successors, (210), 208 states have call predecessors, (210), 210 states have call successors, (210) [2023-12-21 00:33:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1926 transitions. [2023-12-21 00:33:51,780 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1926 transitions. Word has length 521 [2023-12-21 00:33:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:51,781 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 1926 transitions. [2023-12-21 00:33:51,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 3 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 3 states have call predecessors, (111), 3 states have call successors, (111) [2023-12-21 00:33:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1926 transitions. [2023-12-21 00:33:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-12-21 00:33:51,784 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:51,784 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:51,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:52,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-21 00:33:52,007 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:52,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1417774866, now seen corresponding path program 1 times [2023-12-21 00:33:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:52,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75885308] [2023-12-21 00:33:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:52,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:52,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:52,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569585051] [2023-12-21 00:33:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:52,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:52,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:52,050 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:52,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 00:33:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:52,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 00:33:52,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5928 proven. 114 refuted. 0 times theorem prover too weak. 5662 trivial. 0 not checked. [2023-12-21 00:33:52,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:33:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 114 proven. 114 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-12-21 00:33:52,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75885308] [2023-12-21 00:33:52,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569585051] [2023-12-21 00:33:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569585051] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:33:52,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:33:52,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-21 00:33:52,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173998453] [2023-12-21 00:33:52,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:33:52,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 00:33:52,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:52,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 00:33:52,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:33:52,829 INFO L87 Difference]: Start difference. First operand 1179 states and 1926 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-12-21 00:33:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:53,191 INFO L93 Difference]: Finished difference Result 2377 states and 3869 transitions. [2023-12-21 00:33:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 00:33:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) Word has length 522 [2023-12-21 00:33:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:53,195 INFO L225 Difference]: With dead ends: 2377 [2023-12-21 00:33:53,195 INFO L226 Difference]: Without dead ends: 1199 [2023-12-21 00:33:53,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 1036 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-21 00:33:53,198 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 513 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:53,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 848 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 00:33:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2023-12-21 00:33:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1187. [2023-12-21 00:33:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 968 states have (on average 1.5599173553719008) internal successors, (1510), 970 states have internal predecessors, (1510), 210 states have call successors, (210), 8 states have call predecessors, (210), 8 states have return successors, (210), 208 states have call predecessors, (210), 210 states have call successors, (210) [2023-12-21 00:33:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1930 transitions. [2023-12-21 00:33:53,252 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1930 transitions. Word has length 522 [2023-12-21 00:33:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:53,252 INFO L495 AbstractCegarLoop]: Abstraction has 1187 states and 1930 transitions. [2023-12-21 00:33:53,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-12-21 00:33:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1930 transitions. [2023-12-21 00:33:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-12-21 00:33:53,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:53,256 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:53,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:53,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:53,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:53,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 918617644, now seen corresponding path program 1 times [2023-12-21 00:33:53,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:53,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624503304] [2023-12-21 00:33:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:53,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:53,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:53,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777992111] [2023-12-21 00:33:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:53,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:53,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:53,503 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:53,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 00:33:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:53,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 00:33:53,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5718 proven. 135 refuted. 0 times theorem prover too weak. 5851 trivial. 0 not checked. [2023-12-21 00:33:54,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:33:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 93 proven. 135 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-12-21 00:33:54,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:54,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624503304] [2023-12-21 00:33:54,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:54,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777992111] [2023-12-21 00:33:54,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777992111] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:33:54,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:33:54,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-21 00:33:54,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972054687] [2023-12-21 00:33:54,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:33:54,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 00:33:54,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:54,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 00:33:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:33:54,357 INFO L87 Difference]: Start difference. First operand 1187 states and 1930 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-12-21 00:33:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:54,730 INFO L93 Difference]: Finished difference Result 2389 states and 3865 transitions. [2023-12-21 00:33:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 00:33:54,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) Word has length 522 [2023-12-21 00:33:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:54,735 INFO L225 Difference]: With dead ends: 2389 [2023-12-21 00:33:54,735 INFO L226 Difference]: Without dead ends: 1203 [2023-12-21 00:33:54,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 1036 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-21 00:33:54,738 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 456 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:54,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 809 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 00:33:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2023-12-21 00:33:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1187. [2023-12-21 00:33:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 966 states have (on average 1.5403726708074534) internal successors, (1488), 968 states have internal predecessors, (1488), 210 states have call successors, (210), 10 states have call predecessors, (210), 10 states have return successors, (210), 208 states have call predecessors, (210), 210 states have call successors, (210) [2023-12-21 00:33:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1908 transitions. [2023-12-21 00:33:54,794 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1908 transitions. Word has length 522 [2023-12-21 00:33:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:54,794 INFO L495 AbstractCegarLoop]: Abstraction has 1187 states and 1908 transitions. [2023-12-21 00:33:54,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-12-21 00:33:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1908 transitions. [2023-12-21 00:33:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-12-21 00:33:54,798 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:54,798 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:54,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:55,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 00:33:55,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:55,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1467891862, now seen corresponding path program 1 times [2023-12-21 00:33:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:55,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503830535] [2023-12-21 00:33:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:55,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:55,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880967063] [2023-12-21 00:33:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:55,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:55,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:55,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 00:33:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:55,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-21 00:33:55,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:33:55,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503830535] [2023-12-21 00:33:55,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880967063] [2023-12-21 00:33:55,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880967063] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:55,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:55,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 00:33:55,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731901015] [2023-12-21 00:33:55,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:55,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 00:33:55,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 00:33:55,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:33:55,928 INFO L87 Difference]: Start difference. First operand 1187 states and 1908 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:56,264 INFO L93 Difference]: Finished difference Result 3305 states and 5319 transitions. [2023-12-21 00:33:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 00:33:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 522 [2023-12-21 00:33:56,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:56,272 INFO L225 Difference]: With dead ends: 3305 [2023-12-21 00:33:56,272 INFO L226 Difference]: Without dead ends: 2096 [2023-12-21 00:33:56,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-21 00:33:56,275 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 630 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:56,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 2412 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 00:33:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2023-12-21 00:33:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1340. [2023-12-21 00:33:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1037 states have (on average 1.5101253616200578) internal successors, (1566), 1039 states have internal predecessors, (1566), 287 states have call successors, (287), 15 states have call predecessors, (287), 15 states have return successors, (287), 285 states have call predecessors, (287), 287 states have call successors, (287) [2023-12-21 00:33:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2140 transitions. [2023-12-21 00:33:56,372 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2140 transitions. Word has length 522 [2023-12-21 00:33:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:56,373 INFO L495 AbstractCegarLoop]: Abstraction has 1340 states and 2140 transitions. [2023-12-21 00:33:56,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2140 transitions. [2023-12-21 00:33:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-12-21 00:33:56,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:56,376 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:56,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:56,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 00:33:56,584 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:56,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:56,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1807380236, now seen corresponding path program 1 times [2023-12-21 00:33:56,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:56,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682755289] [2023-12-21 00:33:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:56,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:56,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:56,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176655035] [2023-12-21 00:33:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:56,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:56,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:56,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:56,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 00:33:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:56,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:33:56,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:33:57,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:57,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682755289] [2023-12-21 00:33:57,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176655035] [2023-12-21 00:33:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176655035] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:57,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:57,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:33:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744593333] [2023-12-21 00:33:57,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:57,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:33:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:57,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:33:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:57,016 INFO L87 Difference]: Start difference. First operand 1340 states and 2140 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:57,120 INFO L93 Difference]: Finished difference Result 2562 states and 4096 transitions. [2023-12-21 00:33:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:33:57,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 523 [2023-12-21 00:33:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:57,126 INFO L225 Difference]: With dead ends: 2562 [2023-12-21 00:33:57,126 INFO L226 Difference]: Without dead ends: 1376 [2023-12-21 00:33:57,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:33:57,129 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 259 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:57,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1033 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 00:33:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-12-21 00:33:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1152. [2023-12-21 00:33:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 905 states have (on average 1.5248618784530388) internal successors, (1380), 905 states have internal predecessors, (1380), 231 states have call successors, (231), 15 states have call predecessors, (231), 15 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2023-12-21 00:33:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1842 transitions. [2023-12-21 00:33:57,195 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1842 transitions. Word has length 523 [2023-12-21 00:33:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:57,195 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1842 transitions. [2023-12-21 00:33:57,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1842 transitions. [2023-12-21 00:33:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-12-21 00:33:57,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:57,198 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:57,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-21 00:33:57,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:57,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:57,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1162730866, now seen corresponding path program 1 times [2023-12-21 00:33:57,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:57,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369693146] [2023-12-21 00:33:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:57,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:57,446 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:57,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421399859] [2023-12-21 00:33:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:57,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:57,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:57,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:57,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 00:33:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:33:57,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 00:33:57,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:33:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:33:58,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:33:58,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:33:58,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369693146] [2023-12-21 00:33:58,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:33:58,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421399859] [2023-12-21 00:33:58,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421399859] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:33:58,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:33:58,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 00:33:58,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775008935] [2023-12-21 00:33:58,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:33:58,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 00:33:58,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:33:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 00:33:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:33:58,308 INFO L87 Difference]: Start difference. First operand 1152 states and 1842 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:33:59,277 INFO L93 Difference]: Finished difference Result 6536 states and 10598 transitions. [2023-12-21 00:33:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 00:33:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 523 [2023-12-21 00:33:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:33:59,295 INFO L225 Difference]: With dead ends: 6536 [2023-12-21 00:33:59,295 INFO L226 Difference]: Without dead ends: 5538 [2023-12-21 00:33:59,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-12-21 00:33:59,299 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 2847 mSDsluCounter, 2445 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2847 SdHoareTripleChecker+Valid, 3057 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 00:33:59,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2847 Valid, 3057 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 00:33:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5538 states. [2023-12-21 00:33:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5538 to 3285. [2023-12-21 00:33:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3285 states, 2646 states have (on average 1.529100529100529) internal successors, (4046), 2648 states have internal predecessors, (4046), 599 states have call successors, (599), 39 states have call predecessors, (599), 39 states have return successors, (599), 597 states have call predecessors, (599), 599 states have call successors, (599) [2023-12-21 00:33:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 5244 transitions. [2023-12-21 00:33:59,497 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 5244 transitions. Word has length 523 [2023-12-21 00:33:59,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:33:59,498 INFO L495 AbstractCegarLoop]: Abstraction has 3285 states and 5244 transitions. [2023-12-21 00:33:59,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:33:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 5244 transitions. [2023-12-21 00:33:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-12-21 00:33:59,505 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:33:59,505 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:33:59,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 00:33:59,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 00:33:59,713 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:33:59,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:33:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2111168076, now seen corresponding path program 1 times [2023-12-21 00:33:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:33:59,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479709256] [2023-12-21 00:33:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:59,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:33:59,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:33:59,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60247903] [2023-12-21 00:33:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:33:59,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:33:59,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:33:59,801 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:33:59,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 00:34:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:34:00,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-21 00:34:00,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:34:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5399 proven. 141 refuted. 0 times theorem prover too weak. 6164 trivial. 0 not checked. [2023-12-21 00:34:00,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:34:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 309 proven. 144 refuted. 0 times theorem prover too weak. 11251 trivial. 0 not checked. [2023-12-21 00:34:01,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:34:01,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479709256] [2023-12-21 00:34:01,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:34:01,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60247903] [2023-12-21 00:34:01,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60247903] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:34:01,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:34:01,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-12-21 00:34:01,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326446191] [2023-12-21 00:34:01,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:34:01,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 00:34:01,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:34:01,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 00:34:01,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-12-21 00:34:01,185 INFO L87 Difference]: Start difference. First operand 3285 states and 5244 transitions. Second operand has 17 states, 17 states have (on average 11.941176470588236) internal successors, (203), 17 states have internal predecessors, (203), 4 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 4 states have call predecessors, (103), 4 states have call successors, (103) [2023-12-21 00:34:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:34:02,307 INFO L93 Difference]: Finished difference Result 9457 states and 14985 transitions. [2023-12-21 00:34:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 00:34:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 11.941176470588236) internal successors, (203), 17 states have internal predecessors, (203), 4 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 4 states have call predecessors, (103), 4 states have call successors, (103) Word has length 523 [2023-12-21 00:34:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:34:02,328 INFO L225 Difference]: With dead ends: 9457 [2023-12-21 00:34:02,328 INFO L226 Difference]: Without dead ends: 6331 [2023-12-21 00:34:02,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 1028 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2023-12-21 00:34:02,336 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 929 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 2272 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 00:34:02,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 2272 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 00:34:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6331 states. [2023-12-21 00:34:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6331 to 6201. [2023-12-21 00:34:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6201 states, 5147 states have (on average 1.5366232756945795) internal successors, (7909), 5157 states have internal predecessors, (7909), 965 states have call successors, (965), 88 states have call predecessors, (965), 88 states have return successors, (965), 955 states have call predecessors, (965), 965 states have call successors, (965) [2023-12-21 00:34:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6201 states to 6201 states and 9839 transitions. [2023-12-21 00:34:02,625 INFO L78 Accepts]: Start accepts. Automaton has 6201 states and 9839 transitions. Word has length 523 [2023-12-21 00:34:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:34:02,626 INFO L495 AbstractCegarLoop]: Abstraction has 6201 states and 9839 transitions. [2023-12-21 00:34:02,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.941176470588236) internal successors, (203), 17 states have internal predecessors, (203), 4 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 4 states have call predecessors, (103), 4 states have call successors, (103) [2023-12-21 00:34:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6201 states and 9839 transitions. [2023-12-21 00:34:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-12-21 00:34:02,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:34:02,632 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:34:02,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 00:34:02,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:34:02,841 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:34:02,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:34:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash -133462510, now seen corresponding path program 1 times [2023-12-21 00:34:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:34:02,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889783932] [2023-12-21 00:34:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:34:02,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:34:02,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:34:02,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753170889] [2023-12-21 00:34:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:34:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:34:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:34:02,883 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:34:02,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 00:34:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:34:03,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-21 00:34:03,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:34:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 1372 proven. 12 refuted. 0 times theorem prover too weak. 10320 trivial. 0 not checked. [2023-12-21 00:34:03,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:34:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 216 proven. 12 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-12-21 00:34:04,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:34:04,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889783932] [2023-12-21 00:34:04,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:34:04,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753170889] [2023-12-21 00:34:04,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753170889] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:34:04,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:34:04,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-21 00:34:04,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586824578] [2023-12-21 00:34:04,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:34:04,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 00:34:04,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:34:04,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 00:34:04,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-12-21 00:34:04,137 INFO L87 Difference]: Start difference. First operand 6201 states and 9839 transitions. Second operand has 16 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-12-21 00:34:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:34:09,514 INFO L93 Difference]: Finished difference Result 33543 states and 52712 transitions. [2023-12-21 00:34:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-12-21 00:34:09,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) Word has length 523 [2023-12-21 00:34:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:34:09,598 INFO L225 Difference]: With dead ends: 33543 [2023-12-21 00:34:09,599 INFO L226 Difference]: Without dead ends: 27527 [2023-12-21 00:34:09,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1125 GetRequests, 1040 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2579 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1604, Invalid=5536, Unknown=0, NotChecked=0, Total=7140 [2023-12-21 00:34:09,615 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 6756 mSDsluCounter, 7191 mSDsCounter, 0 mSdLazyCounter, 3582 mSolverCounterSat, 1658 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6902 SdHoareTripleChecker+Valid, 7689 SdHoareTripleChecker+Invalid, 5240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1658 IncrementalHoareTripleChecker+Valid, 3582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-21 00:34:09,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6902 Valid, 7689 Invalid, 5240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1658 Valid, 3582 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-21 00:34:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27527 states. [2023-12-21 00:34:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27527 to 13316. [2023-12-21 00:34:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13316 states, 10685 states have (on average 1.4959288722508188) internal successors, (15984), 10717 states have internal predecessors, (15984), 2389 states have call successors, (2389), 241 states have call predecessors, (2389), 241 states have return successors, (2389), 2357 states have call predecessors, (2389), 2389 states have call successors, (2389) [2023-12-21 00:34:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13316 states to 13316 states and 20762 transitions. [2023-12-21 00:34:10,490 INFO L78 Accepts]: Start accepts. Automaton has 13316 states and 20762 transitions. Word has length 523 [2023-12-21 00:34:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:34:10,491 INFO L495 AbstractCegarLoop]: Abstraction has 13316 states and 20762 transitions. [2023-12-21 00:34:10,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-12-21 00:34:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 13316 states and 20762 transitions. [2023-12-21 00:34:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-12-21 00:34:10,498 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:34:10,498 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:34:10,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 00:34:10,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 00:34:10,706 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:34:10,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:34:10,706 INFO L85 PathProgramCache]: Analyzing trace with hash 908278544, now seen corresponding path program 1 times [2023-12-21 00:34:10,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:34:10,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672524557] [2023-12-21 00:34:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:34:10,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:34:10,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:34:10,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702732599] [2023-12-21 00:34:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:34:10,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:34:10,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:34:10,751 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:34:10,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 00:34:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:34:11,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 00:34:11,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:34:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5871 proven. 132 refuted. 0 times theorem prover too weak. 5701 trivial. 0 not checked. [2023-12-21 00:34:13,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:34:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 318 proven. 135 refuted. 0 times theorem prover too weak. 11251 trivial. 0 not checked. [2023-12-21 00:34:17,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:34:17,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672524557] [2023-12-21 00:34:17,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:34:17,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702732599] [2023-12-21 00:34:17,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702732599] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:34:17,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:34:17,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 31 [2023-12-21 00:34:17,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91713502] [2023-12-21 00:34:17,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:34:17,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 00:34:17,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:34:17,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 00:34:17,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2023-12-21 00:34:17,460 INFO L87 Difference]: Start difference. First operand 13316 states and 20762 transitions. Second operand has 31 states, 30 states have (on average 9.0) internal successors, (270), 29 states have internal predecessors, (270), 8 states have call successors, (154), 5 states have call predecessors, (154), 8 states have return successors, (154), 8 states have call predecessors, (154), 8 states have call successors, (154) [2023-12-21 00:34:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:34:26,279 INFO L93 Difference]: Finished difference Result 55918 states and 87895 transitions. [2023-12-21 00:34:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-21 00:34:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 9.0) internal successors, (270), 29 states have internal predecessors, (270), 8 states have call successors, (154), 5 states have call predecessors, (154), 8 states have return successors, (154), 8 states have call predecessors, (154), 8 states have call successors, (154) Word has length 523 [2023-12-21 00:34:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:34:26,400 INFO L225 Difference]: With dead ends: 55918 [2023-12-21 00:34:26,400 INFO L226 Difference]: Without dead ends: 42799 [2023-12-21 00:34:26,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1099 GetRequests, 1021 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1527, Invalid=4793, Unknown=0, NotChecked=0, Total=6320 [2023-12-21 00:34:26,434 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 4734 mSDsluCounter, 5902 mSDsCounter, 0 mSdLazyCounter, 5048 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4785 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 5973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 5048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-21 00:34:26,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4785 Valid, 6410 Invalid, 5973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 5048 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-21 00:34:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42799 states. [2023-12-21 00:34:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42799 to 22580. [2023-12-21 00:34:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22580 states, 18832 states have (on average 1.5075934579439252) internal successors, (28391), 18880 states have internal predecessors, (28391), 3389 states have call successors, (3389), 358 states have call predecessors, (3389), 358 states have return successors, (3389), 3341 states have call predecessors, (3389), 3389 states have call successors, (3389) [2023-12-21 00:34:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22580 states to 22580 states and 35169 transitions. [2023-12-21 00:34:27,997 INFO L78 Accepts]: Start accepts. Automaton has 22580 states and 35169 transitions. Word has length 523 [2023-12-21 00:34:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:34:27,998 INFO L495 AbstractCegarLoop]: Abstraction has 22580 states and 35169 transitions. [2023-12-21 00:34:27,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 9.0) internal successors, (270), 29 states have internal predecessors, (270), 8 states have call successors, (154), 5 states have call predecessors, (154), 8 states have return successors, (154), 8 states have call predecessors, (154), 8 states have call successors, (154) [2023-12-21 00:34:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 22580 states and 35169 transitions. [2023-12-21 00:34:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-12-21 00:34:28,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:34:28,018 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:34:28,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 00:34:28,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 00:34:28,227 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:34:28,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:34:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash 64273042, now seen corresponding path program 1 times [2023-12-21 00:34:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:34:28,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673951829] [2023-12-21 00:34:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:34:28,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:34:28,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:34:28,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207457582] [2023-12-21 00:34:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:34:28,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:34:28,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:34:28,272 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:34:28,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 00:34:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:34:29,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-21 00:34:29,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:34:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 3032 proven. 1014 refuted. 0 times theorem prover too weak. 7658 trivial. 0 not checked. [2023-12-21 00:34:32,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:34:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 66 proven. 1044 refuted. 0 times theorem prover too weak. 10594 trivial. 0 not checked. [2023-12-21 00:34:53,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:34:53,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673951829] [2023-12-21 00:34:53,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:34:53,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207457582] [2023-12-21 00:34:53,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207457582] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:34:53,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:34:53,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2023-12-21 00:34:53,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950150742] [2023-12-21 00:34:53,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:34:53,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-21 00:34:53,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:34:53,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-21 00:34:53,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2023-12-21 00:34:53,085 INFO L87 Difference]: Start difference. First operand 22580 states and 35169 transitions. Second operand has 41 states, 40 states have (on average 7.15) internal successors, (286), 39 states have internal predecessors, (286), 11 states have call successors, (153), 6 states have call predecessors, (153), 14 states have return successors, (154), 10 states have call predecessors, (154), 11 states have call successors, (154) [2023-12-21 00:34:56,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-21 00:35:00,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-21 00:35:14,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-21 00:35:19,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-21 00:35:33,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-21 00:35:40,620 WARN L293 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 92 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:35:47,979 WARN L293 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 92 DAG size of output: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:36:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:36:01,760 INFO L93 Difference]: Finished difference Result 110551 states and 170185 transitions. [2023-12-21 00:36:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-12-21 00:36:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 7.15) internal successors, (286), 39 states have internal predecessors, (286), 11 states have call successors, (153), 6 states have call predecessors, (153), 14 states have return successors, (154), 10 states have call predecessors, (154), 11 states have call successors, (154) Word has length 523 [2023-12-21 00:36:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:36:01,934 INFO L225 Difference]: With dead ends: 110551 [2023-12-21 00:36:01,934 INFO L226 Difference]: Without dead ends: 89188 [2023-12-21 00:36:01,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1111 GetRequests, 1010 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2789 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=2601, Invalid=7905, Unknown=0, NotChecked=0, Total=10506 [2023-12-21 00:36:01,982 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 6564 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 3712 mSolverCounterSat, 641 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6564 SdHoareTripleChecker+Valid, 3387 SdHoareTripleChecker+Invalid, 4356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 3712 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:36:01,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6564 Valid, 3387 Invalid, 4356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 3712 Invalid, 3 Unknown, 0 Unchecked, 24.0s Time] [2023-12-21 00:36:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89188 states. [2023-12-21 00:36:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89188 to 34645. [2023-12-21 00:36:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34645 states, 30543 states have (on average 1.508790884981829) internal successors, (46083), 30591 states have internal predecessors, (46083), 3389 states have call successors, (3389), 712 states have call predecessors, (3389), 712 states have return successors, (3389), 3341 states have call predecessors, (3389), 3389 states have call successors, (3389) [2023-12-21 00:36:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34645 states to 34645 states and 52861 transitions. [2023-12-21 00:36:04,758 INFO L78 Accepts]: Start accepts. Automaton has 34645 states and 52861 transitions. Word has length 523 [2023-12-21 00:36:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:36:04,758 INFO L495 AbstractCegarLoop]: Abstraction has 34645 states and 52861 transitions. [2023-12-21 00:36:04,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 7.15) internal successors, (286), 39 states have internal predecessors, (286), 11 states have call successors, (153), 6 states have call predecessors, (153), 14 states have return successors, (154), 10 states have call predecessors, (154), 11 states have call successors, (154) [2023-12-21 00:36:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 34645 states and 52861 transitions. [2023-12-21 00:36:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-12-21 00:36:04,786 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:36:04,787 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:36:04,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 00:36:04,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 00:36:04,997 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:36:04,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:36:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 957759380, now seen corresponding path program 1 times [2023-12-21 00:36:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:36:04,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772600380] [2023-12-21 00:36:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:36:04,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:36:05,036 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:36:05,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957443865] [2023-12-21 00:36:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:36:05,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:36:05,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:36:05,037 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:36:05,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 00:36:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:36:11,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-21 00:36:11,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:36:41,326 WARN L293 SmtUtils]: Spent 11.80s on a formula simplification. DAG size of input: 111 DAG size of output: 45 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-12-21 00:36:52,474 WARN L293 SmtUtils]: Spent 11.15s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-12-21 00:37:06,445 WARN L293 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 69 DAG size of output: 43 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-12-21 00:37:47,659 WARN L293 SmtUtils]: Spent 13.12s on a formula simplification. DAG size of input: 61 DAG size of output: 20 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-12-21 00:38:00,119 WARN L293 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 31 DAG size of output: 25 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-12-21 00:39:54,246 WARN L293 SmtUtils]: Spent 52.27s on a formula simplification. DAG size of input: 109 DAG size of output: 85 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:40:11,223 WARN L293 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:40:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 8277 proven. 1227 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2023-12-21 00:40:28,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:40:47,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:40:47,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772600380] [2023-12-21 00:40:47,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:40:47,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957443865] [2023-12-21 00:40:47,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957443865] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 00:40:47,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 00:40:47,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-12-21 00:40:47,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321150447] [2023-12-21 00:40:47,830 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 00:40:47,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-21 00:40:47,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:40:47,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-21 00:40:47,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1345, Unknown=3, NotChecked=0, Total=1640 [2023-12-21 00:40:47,832 INFO L87 Difference]: Start difference. First operand 34645 states and 52861 transitions. Second operand has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 30 states have internal predecessors, (180), 10 states have call successors, (77), 10 states have call predecessors, (77), 14 states have return successors, (77), 10 states have call predecessors, (77), 10 states have call successors, (77) [2023-12-21 00:41:02,511 WARN L293 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 129 DAG size of output: 112 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:41:22,531 WARN L293 SmtUtils]: Spent 11.94s on a formula simplification. DAG size of input: 136 DAG size of output: 115 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:41:42,258 WARN L293 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 127 DAG size of output: 125 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:42:01,335 WARN L293 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 130 DAG size of output: 128 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:42:18,888 WARN L293 SmtUtils]: Spent 9.31s on a formula simplification. DAG size of input: 132 DAG size of output: 130 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:42:20,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-21 00:42:35,376 WARN L293 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 130 DAG size of output: 113 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 00:42:40,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-21 00:42:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:42:46,505 INFO L93 Difference]: Finished difference Result 79722 states and 119588 transitions. [2023-12-21 00:42:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-21 00:42:46,507 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 30 states have internal predecessors, (180), 10 states have call successors, (77), 10 states have call predecessors, (77), 14 states have return successors, (77), 10 states have call predecessors, (77), 10 states have call successors, (77) Word has length 523 [2023-12-21 00:42:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:42:46,596 INFO L225 Difference]: With dead ends: 79722 [2023-12-21 00:42:46,596 INFO L226 Difference]: Without dead ends: 56960 [2023-12-21 00:42:46,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 175.3s TimeCoverageRelationStatistics Valid=1372, Invalid=5096, Unknown=12, NotChecked=0, Total=6480 [2023-12-21 00:42:46,625 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1104 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 3182 mSolverCounterSat, 158 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 2554 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3182 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-12-21 00:42:46,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1110 Valid, 2554 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3182 Invalid, 1 Unknown, 0 Unchecked, 14.5s Time] [2023-12-21 00:42:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56960 states. [2023-12-21 00:42:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56960 to 28147. [2023-12-21 00:42:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28147 states, 25027 states have (on average 1.4927478323410717) internal successors, (37359), 25095 states have internal predecessors, (37359), 2377 states have call successors, (2377), 742 states have call predecessors, (2377), 742 states have return successors, (2377), 2309 states have call predecessors, (2377), 2377 states have call successors, (2377) [2023-12-21 00:42:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28147 states to 28147 states and 42113 transitions. [2023-12-21 00:42:49,481 INFO L78 Accepts]: Start accepts. Automaton has 28147 states and 42113 transitions. Word has length 523 [2023-12-21 00:42:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:42:49,482 INFO L495 AbstractCegarLoop]: Abstraction has 28147 states and 42113 transitions. [2023-12-21 00:42:49,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 30 states have internal predecessors, (180), 10 states have call successors, (77), 10 states have call predecessors, (77), 14 states have return successors, (77), 10 states have call predecessors, (77), 10 states have call successors, (77) [2023-12-21 00:42:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 28147 states and 42113 transitions. [2023-12-21 00:42:49,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2023-12-21 00:42:49,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:42:49,495 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:42:49,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-21 00:42:49,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 00:42:49,708 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:42:49,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:42:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1659359254, now seen corresponding path program 1 times [2023-12-21 00:42:49,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:42:49,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380344888] [2023-12-21 00:42:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:42:49,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:42:49,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:42:49,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162475522] [2023-12-21 00:42:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:42:49,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:42:49,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:42:49,747 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:42:49,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 00:42:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:42:56,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 00:42:56,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:42:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 7309 proven. 498 refuted. 0 times theorem prover too weak. 3897 trivial. 0 not checked. [2023-12-21 00:42:58,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:42:58,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:42:58,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380344888] [2023-12-21 00:42:58,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:42:58,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162475522] [2023-12-21 00:42:58,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162475522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 00:42:58,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 00:42:58,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-21 00:42:58,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600542321] [2023-12-21 00:42:58,780 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 00:42:58,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 00:42:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:42:58,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 00:42:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-12-21 00:42:58,781 INFO L87 Difference]: Start difference. First operand 28147 states and 42113 transitions. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 4 states have call successors, (77), 4 states have call predecessors, (77), 7 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-12-21 00:43:01,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 00:43:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:43:05,812 INFO L93 Difference]: Finished difference Result 56697 states and 84481 transitions. [2023-12-21 00:43:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 00:43:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 4 states have call successors, (77), 4 states have call predecessors, (77), 7 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) Word has length 523 [2023-12-21 00:43:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:43:05,853 INFO L225 Difference]: With dead ends: 56697 [2023-12-21 00:43:05,853 INFO L226 Difference]: Without dead ends: 28831 [2023-12-21 00:43:05,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 830 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-12-21 00:43:05,872 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 770 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:43:05,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 1403 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-12-21 00:43:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28831 states. [2023-12-21 00:43:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28831 to 28359. [2023-12-21 00:43:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28359 states, 25186 states have (on average 1.4874930516953864) internal successors, (37464), 25254 states have internal predecessors, (37464), 2377 states have call successors, (2377), 795 states have call predecessors, (2377), 795 states have return successors, (2377), 2309 states have call predecessors, (2377), 2377 states have call successors, (2377) [2023-12-21 00:43:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28359 states to 28359 states and 42218 transitions. [2023-12-21 00:43:08,403 INFO L78 Accepts]: Start accepts. Automaton has 28359 states and 42218 transitions. Word has length 523 [2023-12-21 00:43:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:43:08,404 INFO L495 AbstractCegarLoop]: Abstraction has 28359 states and 42218 transitions. [2023-12-21 00:43:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 4 states have call successors, (77), 4 states have call predecessors, (77), 7 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-12-21 00:43:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 28359 states and 42218 transitions. [2023-12-21 00:43:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-12-21 00:43:08,416 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:43:08,416 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:43:08,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-21 00:43:08,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:43:08,629 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:43:08,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:43:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1925203923, now seen corresponding path program 1 times [2023-12-21 00:43:08,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:43:08,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922867960] [2023-12-21 00:43:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:43:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:43:08,665 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:43:08,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395193440] [2023-12-21 00:43:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:43:08,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:43:08,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:43:08,682 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:43:08,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 00:43:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:43:09,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-21 00:43:09,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:43:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:43:09,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:43:09,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:43:09,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922867960] [2023-12-21 00:43:09,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:43:09,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395193440] [2023-12-21 00:43:09,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395193440] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:43:09,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:43:09,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 00:43:09,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938798782] [2023-12-21 00:43:09,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:43:09,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 00:43:09,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:43:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 00:43:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:43:09,144 INFO L87 Difference]: Start difference. First operand 28359 states and 42218 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, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:43:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:43:14,344 INFO L93 Difference]: Finished difference Result 77556 states and 115003 transitions. [2023-12-21 00:43:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 00:43:14,345 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, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 524 [2023-12-21 00:43:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:43:14,413 INFO L225 Difference]: With dead ends: 77556 [2023-12-21 00:43:14,413 INFO L226 Difference]: Without dead ends: 49610 [2023-12-21 00:43:14,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 00:43:14,433 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 385 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 00:43:14,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1015 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 00:43:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49610 states. [2023-12-21 00:43:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49610 to 36729. [2023-12-21 00:43:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36729 states, 33556 states have (on average 1.4962152819167958) internal successors, (50207), 33624 states have internal predecessors, (50207), 2377 states have call successors, (2377), 795 states have call predecessors, (2377), 795 states have return successors, (2377), 2309 states have call predecessors, (2377), 2377 states have call successors, (2377) [2023-12-21 00:43:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36729 states to 36729 states and 54961 transitions. [2023-12-21 00:43:17,365 INFO L78 Accepts]: Start accepts. Automaton has 36729 states and 54961 transitions. Word has length 524 [2023-12-21 00:43:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:43:17,366 INFO L495 AbstractCegarLoop]: Abstraction has 36729 states and 54961 transitions. [2023-12-21 00:43:17,366 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, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:43:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 36729 states and 54961 transitions. [2023-12-21 00:43:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-12-21 00:43:17,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:43:17,380 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:43:17,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-21 00:43:17,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:43:17,590 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:43:17,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:43:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2084130865, now seen corresponding path program 1 times [2023-12-21 00:43:17,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:43:17,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179538120] [2023-12-21 00:43:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:43:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:43:17,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:43:17,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149536919] [2023-12-21 00:43:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:43:17,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:43:17,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:43:17,647 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:43:17,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 00:43:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:43:18,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-21 00:43:18,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:43:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:43:18,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:43:18,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:43:18,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179538120] [2023-12-21 00:43:18,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:43:18,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149536919] [2023-12-21 00:43:18,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149536919] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:43:18,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:43:18,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 00:43:18,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948375112] [2023-12-21 00:43:18,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:43:18,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 00:43:18,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:43:18,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 00:43:18,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 00:43:18,135 INFO L87 Difference]: Start difference. First operand 36729 states and 54961 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, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:43:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:43:22,637 INFO L93 Difference]: Finished difference Result 87461 states and 131129 transitions. [2023-12-21 00:43:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 00:43:22,637 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, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 524 [2023-12-21 00:43:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:43:22,707 INFO L225 Difference]: With dead ends: 87461 [2023-12-21 00:43:22,708 INFO L226 Difference]: Without dead ends: 50626 [2023-12-21 00:43:22,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:43:22,727 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 588 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-21 00:43:22,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1107 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-21 00:43:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50626 states. [2023-12-21 00:43:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50626 to 50608. [2023-12-21 00:43:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50608 states, 46421 states have (on average 1.4986751685659507) internal successors, (69570), 46509 states have internal predecessors, (69570), 3141 states have call successors, (3141), 1045 states have call predecessors, (3141), 1045 states have return successors, (3141), 3053 states have call predecessors, (3141), 3141 states have call successors, (3141) [2023-12-21 00:43:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50608 states to 50608 states and 75852 transitions. [2023-12-21 00:43:26,513 INFO L78 Accepts]: Start accepts. Automaton has 50608 states and 75852 transitions. Word has length 524 [2023-12-21 00:43:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:43:26,514 INFO L495 AbstractCegarLoop]: Abstraction has 50608 states and 75852 transitions. [2023-12-21 00:43:26,514 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, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:43:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 50608 states and 75852 transitions. [2023-12-21 00:43:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-12-21 00:43:26,534 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:43:26,534 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:43:26,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-21 00:43:26,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:43:26,741 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:43:26,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:43:26,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1882306931, now seen corresponding path program 1 times [2023-12-21 00:43:26,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:43:26,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096064953] [2023-12-21 00:43:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:43:26,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:43:26,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:43:26,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177660964] [2023-12-21 00:43:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:43:26,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:43:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:43:26,817 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:43:26,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 00:43:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:43:27,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 00:43:27,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:43:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:43:27,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:43:27,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:43:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096064953] [2023-12-21 00:43:27,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:43:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177660964] [2023-12-21 00:43:27,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177660964] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:43:27,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:43:27,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 00:43:27,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272905368] [2023-12-21 00:43:27,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:43:27,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 00:43:27,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:43:27,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 00:43:27,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-21 00:43:27,321 INFO L87 Difference]: Start difference. First operand 50608 states and 75852 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:43:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:43:37,078 INFO L93 Difference]: Finished difference Result 165518 states and 247210 transitions. [2023-12-21 00:43:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 00:43:37,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 524 [2023-12-21 00:43:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:43:37,249 INFO L225 Difference]: With dead ends: 165518 [2023-12-21 00:43:37,249 INFO L226 Difference]: Without dead ends: 125395 [2023-12-21 00:43:37,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:43:37,283 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 781 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 00:43:37,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 2156 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 00:43:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125395 states. [2023-12-21 00:43:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125395 to 114872. [2023-12-21 00:43:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114872 states, 106963 states have (on average 1.4997896468872414) internal successors, (160422), 107219 states have internal predecessors, (160422), 5713 states have call successors, (5713), 2195 states have call predecessors, (5713), 2195 states have return successors, (5713), 5457 states have call predecessors, (5713), 5713 states have call successors, (5713) [2023-12-21 00:43:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114872 states to 114872 states and 171848 transitions. [2023-12-21 00:43:45,815 INFO L78 Accepts]: Start accepts. Automaton has 114872 states and 171848 transitions. Word has length 524 [2023-12-21 00:43:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:43:45,816 INFO L495 AbstractCegarLoop]: Abstraction has 114872 states and 171848 transitions. [2023-12-21 00:43:45,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:43:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 114872 states and 171848 transitions. [2023-12-21 00:43:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-12-21 00:43:45,859 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:43:45,860 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:43:45,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-21 00:43:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:43:46,069 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:43:46,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:43:46,069 INFO L85 PathProgramCache]: Analyzing trace with hash 814000719, now seen corresponding path program 1 times [2023-12-21 00:43:46,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:43:46,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231114016] [2023-12-21 00:43:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:43:46,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:43:46,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:43:46,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945415971] [2023-12-21 00:43:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:43:46,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:43:46,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:43:46,342 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:43:46,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 00:43:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:43:46,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 00:43:46,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:43:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-12-21 00:43:47,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 00:43:47,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:43:47,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231114016] [2023-12-21 00:43:47,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:43:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945415971] [2023-12-21 00:43:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945415971] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 00:43:47,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 00:43:47,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 00:43:47,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420713676] [2023-12-21 00:43:47,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 00:43:47,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 00:43:47,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:43:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 00:43:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-21 00:43:47,366 INFO L87 Difference]: Start difference. First operand 114872 states and 171848 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:43:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:43:59,547 INFO L93 Difference]: Finished difference Result 234265 states and 350651 transitions. [2023-12-21 00:43:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 00:43:59,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 524 [2023-12-21 00:43:59,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:44:00,159 INFO L225 Difference]: With dead ends: 234265 [2023-12-21 00:44:00,159 INFO L226 Difference]: Without dead ends: 180761 [2023-12-21 00:44:00,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-21 00:44:00,214 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 1767 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1767 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 00:44:00,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1767 Valid, 2060 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 00:44:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180761 states. [2023-12-21 00:44:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180761 to 129820. [2023-12-21 00:44:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129820 states, 120888 states have (on average 1.4991231553173185) internal successors, (181226), 121164 states have internal predecessors, (181226), 6477 states have call successors, (6477), 2454 states have call predecessors, (6477), 2454 states have return successors, (6477), 6201 states have call predecessors, (6477), 6477 states have call successors, (6477) [2023-12-21 00:44:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129820 states to 129820 states and 194180 transitions. [2023-12-21 00:44:09,881 INFO L78 Accepts]: Start accepts. Automaton has 129820 states and 194180 transitions. Word has length 524 [2023-12-21 00:44:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:44:09,882 INFO L495 AbstractCegarLoop]: Abstraction has 129820 states and 194180 transitions. [2023-12-21 00:44:09,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-12-21 00:44:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 129820 states and 194180 transitions. [2023-12-21 00:44:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-12-21 00:44:09,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:44:09,963 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:44:09,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-21 00:44:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:44:10,186 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:44:10,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:44:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -83392559, now seen corresponding path program 1 times [2023-12-21 00:44:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:44:10,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315045968] [2023-12-21 00:44:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:44:10,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:44:10,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:44:10,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038639310] [2023-12-21 00:44:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:44:10,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:44:10,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:44:10,242 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:44:10,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 00:44:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:44:10,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 00:44:10,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:44:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5116 proven. 156 refuted. 0 times theorem prover too weak. 6432 trivial. 0 not checked. [2023-12-21 00:44:11,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:44:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 72 proven. 156 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-12-21 00:44:11,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:44:11,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315045968] [2023-12-21 00:44:11,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:44:11,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038639310] [2023-12-21 00:44:11,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038639310] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:44:11,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:44:11,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-21 00:44:11,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82848510] [2023-12-21 00:44:11,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:44:11,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 00:44:11,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:44:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 00:44:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:44:11,671 INFO L87 Difference]: Start difference. First operand 129820 states and 194180 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, (129), 2 states have call predecessors, (129), 4 states have return successors, (130), 2 states have call predecessors, (130), 2 states have call successors, (130) [2023-12-21 00:44:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 00:44:19,533 INFO L93 Difference]: Finished difference Result 210141 states and 313042 transitions. [2023-12-21 00:44:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 00:44:19,534 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, (129), 2 states have call predecessors, (129), 4 states have return successors, (130), 2 states have call predecessors, (130), 2 states have call successors, (130) Word has length 524 [2023-12-21 00:44:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 00:44:19,795 INFO L225 Difference]: With dead ends: 210141 [2023-12-21 00:44:19,795 INFO L226 Difference]: Without dead ends: 100885 [2023-12-21 00:44:19,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 1040 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-12-21 00:44:19,854 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 201 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 00:44:19,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 906 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 00:44:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100885 states. [2023-12-21 00:44:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100885 to 94446. [2023-12-21 00:44:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94446 states, 87365 states have (on average 1.4864991701482286) internal successors, (129868), 87551 states have internal predecessors, (129868), 5127 states have call successors, (5127), 1953 states have call predecessors, (5127), 1953 states have return successors, (5127), 4941 states have call predecessors, (5127), 5127 states have call successors, (5127) [2023-12-21 00:44:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94446 states to 94446 states and 140122 transitions. [2023-12-21 00:44:27,203 INFO L78 Accepts]: Start accepts. Automaton has 94446 states and 140122 transitions. Word has length 524 [2023-12-21 00:44:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 00:44:27,203 INFO L495 AbstractCegarLoop]: Abstraction has 94446 states and 140122 transitions. [2023-12-21 00:44:27,203 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, (129), 2 states have call predecessors, (129), 4 states have return successors, (130), 2 states have call predecessors, (130), 2 states have call successors, (130) [2023-12-21 00:44:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 94446 states and 140122 transitions. [2023-12-21 00:44:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-12-21 00:44:27,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 00:44:27,242 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 00:44:27,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-21 00:44:27,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:44:27,452 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 00:44:27,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 00:44:27,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1527920827, now seen corresponding path program 1 times [2023-12-21 00:44:27,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 00:44:27,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923259181] [2023-12-21 00:44:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:44:27,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 00:44:27,489 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 00:44:27,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428984861] [2023-12-21 00:44:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 00:44:27,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 00:44:27,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 00:44:27,490 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 00:44:27,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 00:44:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 00:44:27,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 00:44:27,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 00:44:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5328 proven. 150 refuted. 0 times theorem prover too weak. 6226 trivial. 0 not checked. [2023-12-21 00:44:28,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 00:44:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 78 proven. 150 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-12-21 00:44:28,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 00:44:28,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923259181] [2023-12-21 00:44:28,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 00:44:28,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428984861] [2023-12-21 00:44:28,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428984861] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 00:44:28,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 00:44:28,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-21 00:44:28,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982671326] [2023-12-21 00:44:28,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 00:44:28,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 00:44:28,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 00:44:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 00:44:28,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 00:44:28,587 INFO L87 Difference]: Start difference. First operand 94446 states and 140122 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128)