/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/array-fpi/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 10:18:10,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 10:18:10,408 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 10:18:10,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 10:18:10,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 10:18:10,441 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 10:18:10,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 10:18:10,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 10:18:10,442 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 10:18:10,445 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 10:18:10,446 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 10:18:10,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 10:18:10,447 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 10:18:10,448 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 10:18:10,448 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 10:18:10,448 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 10:18:10,449 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 10:18:10,449 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 10:18:10,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 10:18:10,450 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 10:18:10,450 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 10:18:10,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 10:18:10,451 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 10:18:10,451 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 10:18:10,451 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 10:18:10,451 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 10:18:10,451 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 10:18:10,452 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 10:18:10,452 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 10:18:10,452 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 10:18:10,453 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 10:18:10,453 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 10:18:10,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:18:10,454 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 10:18:10,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 10:18:10,454 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 10:18:10,454 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 10:18:10,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 10:18:10,454 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 10:18:10,455 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 10:18:10,455 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 10:18:10,455 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 10:18:10,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 10:18:10,455 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 10:18:10,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 10:18:10,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 10:18:10,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 10:18:10,729 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 10:18:10,729 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 10:18:10,731 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2023-12-20 10:18:11,880 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 10:18:12,083 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 10:18:12,084 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c [2023-12-20 10:18:12,090 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47acc43bc/009b6af43e094bef903a41a92ce2293b/FLAG81b4d57e8 [2023-12-20 10:18:12,100 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47acc43bc/009b6af43e094bef903a41a92ce2293b [2023-12-20 10:18:12,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 10:18:12,103 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 10:18:12,104 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 10:18:12,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 10:18:12,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 10:18:12,109 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cebed06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12, skipping insertion in model container [2023-12-20 10:18:12,110 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,129 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 10:18:12,260 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c[590,603] [2023-12-20 10:18:12,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:18:12,294 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 10:18:12,305 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c[590,603] [2023-12-20 10:18:12,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:18:12,323 INFO L206 MainTranslator]: Completed translation [2023-12-20 10:18:12,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12 WrapperNode [2023-12-20 10:18:12,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 10:18:12,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 10:18:12,325 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 10:18:12,325 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 10:18:12,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,335 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,351 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-12-20 10:18:12,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 10:18:12,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 10:18:12,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 10:18:12,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 10:18:12,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,367 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,378 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 4, 4, 4]. 29 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 2, 2, 2]. [2023-12-20 10:18:12,379 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,379 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,384 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 10:18:12,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 10:18:12,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 10:18:12,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 10:18:12,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (1/1) ... [2023-12-20 10:18:12,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:18:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:12,426 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) [2023-12-20 10:18:12,438 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 [2023-12-20 10:18:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 10:18:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 10:18:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 10:18:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 10:18:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 10:18:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 10:18:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 10:18:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 10:18:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 10:18:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 10:18:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 10:18:12,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 10:18:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 10:18:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 10:18:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 10:18:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 10:18:12,550 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 10:18:12,552 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 10:18:12,787 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 10:18:12,843 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 10:18:12,843 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-20 10:18:12,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:18:12 BoogieIcfgContainer [2023-12-20 10:18:12,844 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 10:18:12,846 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 10:18:12,846 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 10:18:12,852 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 10:18:12,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 10:18:12" (1/3) ... [2023-12-20 10:18:12,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26039afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:18:12, skipping insertion in model container [2023-12-20 10:18:12,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:12" (2/3) ... [2023-12-20 10:18:12,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26039afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:18:12, skipping insertion in model container [2023-12-20 10:18:12,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:18:12" (3/3) ... [2023-12-20 10:18:12,857 INFO L112 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2023-12-20 10:18:12,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 10:18:12,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 10:18:12,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 10:18:12,918 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;@7c98534a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 10:18:12,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 10:18:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-20 10:18:12,929 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:12,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:12,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:12,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:12,935 INFO L85 PathProgramCache]: Analyzing trace with hash 744019223, now seen corresponding path program 1 times [2023-12-20 10:18:12,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:12,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759458743] [2023-12-20 10:18:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:12,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:13,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:13,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759458743] [2023-12-20 10:18:13,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 10:18:13,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355986791] [2023-12-20 10:18:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:13,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:13,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:13,069 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) [2023-12-20 10:18:13,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 10:18:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:13,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-20 10:18:13,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:13,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:18:13,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355986791] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:18:13,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:18:13,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 10:18:13,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490693251] [2023-12-20 10:18:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:18:13,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 10:18:13,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 10:18:13,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:18:13,252 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:13,276 INFO L93 Difference]: Finished difference Result 45 states and 69 transitions. [2023-12-20 10:18:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 10:18:13,278 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-20 10:18:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:13,284 INFO L225 Difference]: With dead ends: 45 [2023-12-20 10:18:13,284 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 10:18:13,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:18:13,290 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2023-12-20 10:18:13,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:18:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 10:18:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-20 10:18:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-12-20 10:18:13,321 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2023-12-20 10:18:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:13,322 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-12-20 10:18:13,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-12-20 10:18:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-20 10:18:13,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:13,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:13,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 10:18:13,529 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 [2023-12-20 10:18:13,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:13,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:13,530 INFO L85 PathProgramCache]: Analyzing trace with hash 262319171, now seen corresponding path program 1 times [2023-12-20 10:18:13,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:13,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671722021] [2023-12-20 10:18:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:13,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:13,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671722021] [2023-12-20 10:18:13,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 10:18:13,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81869306] [2023-12-20 10:18:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:13,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:13,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:13,587 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) [2023-12-20 10:18:13,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 10:18:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:13,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 10:18:13,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:13,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:18:13,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81869306] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:18:13,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:18:13,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 10:18:13,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078080216] [2023-12-20 10:18:13,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:18:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 10:18:13,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 10:18:13,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 10:18:13,726 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:13,797 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2023-12-20 10:18:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 10:18:13,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-20 10:18:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:13,800 INFO L225 Difference]: With dead ends: 49 [2023-12-20 10:18:13,800 INFO L226 Difference]: Without dead ends: 35 [2023-12-20 10:18:13,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 10:18:13,802 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:13,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:18:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-20 10:18:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2023-12-20 10:18:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-12-20 10:18:13,818 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 13 [2023-12-20 10:18:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:13,818 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-12-20 10:18:13,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-12-20 10:18:13,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-20 10:18:13,820 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:13,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:13,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:14,026 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 [2023-12-20 10:18:14,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:14,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash 985676480, now seen corresponding path program 1 times [2023-12-20 10:18:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:14,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527639028] [2023-12-20 10:18:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:14,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:14,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049531552] [2023-12-20 10:18:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:14,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:14,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:14,078 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) [2023-12-20 10:18:14,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 10:18:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:14,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 10:18:14,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:18:14,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:18:14,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:14,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527639028] [2023-12-20 10:18:14,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:14,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049531552] [2023-12-20 10:18:14,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049531552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:18:14,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:18:14,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 10:18:14,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813915041] [2023-12-20 10:18:14,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:18:14,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 10:18:14,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 10:18:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 10:18:14,161 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:14,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:14,210 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-12-20 10:18:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 10:18:14,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-20 10:18:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:14,213 INFO L225 Difference]: With dead ends: 54 [2023-12-20 10:18:14,213 INFO L226 Difference]: Without dead ends: 35 [2023-12-20 10:18:14,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 10:18:14,216 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:14,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:18:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-20 10:18:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2023-12-20 10:18:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-12-20 10:18:14,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2023-12-20 10:18:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:14,231 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-12-20 10:18:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-12-20 10:18:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-20 10:18:14,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:14,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:14,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:14,438 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 [2023-12-20 10:18:14,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:14,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:14,439 INFO L85 PathProgramCache]: Analyzing trace with hash -789330882, now seen corresponding path program 1 times [2023-12-20 10:18:14,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:14,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62181672] [2023-12-20 10:18:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:14,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:14,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:14,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988278423] [2023-12-20 10:18:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:14,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:14,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:14,465 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) [2023-12-20 10:18:14,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 10:18:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:14,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 10:18:14,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:14,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:18:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:18:14,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:18:14,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:14,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62181672] [2023-12-20 10:18:14,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:14,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988278423] [2023-12-20 10:18:14,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988278423] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:18:14,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:18:14,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 10:18:14,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687184117] [2023-12-20 10:18:14,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:18:14,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 10:18:14,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:14,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 10:18:14,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-20 10:18:14,642 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:14,694 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-12-20 10:18:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 10:18:14,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-20 10:18:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:14,696 INFO L225 Difference]: With dead ends: 33 [2023-12-20 10:18:14,696 INFO L226 Difference]: Without dead ends: 31 [2023-12-20 10:18:14,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-20 10:18:14,697 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:14,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:18:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-20 10:18:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-20 10:18:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-12-20 10:18:14,702 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 22 [2023-12-20 10:18:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:14,703 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-12-20 10:18:14,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-12-20 10:18:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 10:18:14,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:14,704 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:14,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:14,910 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 [2023-12-20 10:18:14,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:14,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -5157465, now seen corresponding path program 1 times [2023-12-20 10:18:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:14,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115065873] [2023-12-20 10:18:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:14,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:14,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005839721] [2023-12-20 10:18:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:14,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:14,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:14,941 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) [2023-12-20 10:18:14,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 10:18:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:15,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 10:18:15,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:18:15,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:18:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:18:15,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:15,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115065873] [2023-12-20 10:18:15,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:15,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005839721] [2023-12-20 10:18:15,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005839721] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:18:15,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:18:15,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-20 10:18:15,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837682822] [2023-12-20 10:18:15,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:18:15,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 10:18:15,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:15,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 10:18:15,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-20 10:18:15,152 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:15,288 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2023-12-20 10:18:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 10:18:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-20 10:18:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:15,290 INFO L225 Difference]: With dead ends: 81 [2023-12-20 10:18:15,290 INFO L226 Difference]: Without dead ends: 47 [2023-12-20 10:18:15,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-20 10:18:15,292 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:15,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 32 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:18:15,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-20 10:18:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-12-20 10:18:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-12-20 10:18:15,304 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 25 [2023-12-20 10:18:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:15,304 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-12-20 10:18:15,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-12-20 10:18:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 10:18:15,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:15,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:15,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:15,511 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 [2023-12-20 10:18:15,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:15,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash -17802788, now seen corresponding path program 1 times [2023-12-20 10:18:15,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:15,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274994352] [2023-12-20 10:18:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:15,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:15,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:15,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830145417] [2023-12-20 10:18:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:15,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:15,550 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) [2023-12-20 10:18:15,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 10:18:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:15,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-20 10:18:15,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:15,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:18:15,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:18:15,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-20 10:18:15,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:18:15,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:18:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:16,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:18:16,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-12-20 10:18:16,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:18:16,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 55 [2023-12-20 10:18:16,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-20 10:18:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:18:16,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274994352] [2023-12-20 10:18:16,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830145417] [2023-12-20 10:18:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830145417] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:18:16,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:18:16,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2023-12-20 10:18:16,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595590205] [2023-12-20 10:18:16,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:18:16,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-20 10:18:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-20 10:18:16,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2023-12-20 10:18:16,426 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:16,801 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2023-12-20 10:18:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 10:18:16,801 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-20 10:18:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:16,802 INFO L225 Difference]: With dead ends: 74 [2023-12-20 10:18:16,802 INFO L226 Difference]: Without dead ends: 45 [2023-12-20 10:18:16,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 10:18:16,803 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 89 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:16,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 58 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:18:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-20 10:18:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-12-20 10:18:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-12-20 10:18:16,808 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 34 [2023-12-20 10:18:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:16,808 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-12-20 10:18:16,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:16,808 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-12-20 10:18:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 10:18:16,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:16,809 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:16,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:17,009 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 [2023-12-20 10:18:17,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:17,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2076677303, now seen corresponding path program 2 times [2023-12-20 10:18:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:17,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496282808] [2023-12-20 10:18:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:17,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:17,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:17,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764738933] [2023-12-20 10:18:17,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:18:17,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:17,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:17,031 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) [2023-12-20 10:18:17,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 10:18:17,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:18:17,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:18:17,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 10:18:17,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 10:18:17,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:18:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 10:18:17,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496282808] [2023-12-20 10:18:17,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764738933] [2023-12-20 10:18:17,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764738933] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:18:17,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:18:17,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-20 10:18:17,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653156040] [2023-12-20 10:18:17,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:18:17,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 10:18:17,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 10:18:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-20 10:18:17,282 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:17,435 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2023-12-20 10:18:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 10:18:17,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-20 10:18:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:17,438 INFO L225 Difference]: With dead ends: 107 [2023-12-20 10:18:17,438 INFO L226 Difference]: Without dead ends: 59 [2023-12-20 10:18:17,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-12-20 10:18:17,440 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:17,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 39 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:18:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-20 10:18:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2023-12-20 10:18:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-12-20 10:18:17,449 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2023-12-20 10:18:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:17,450 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-12-20 10:18:17,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-12-20 10:18:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-20 10:18:17,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:17,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:17,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:17,656 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 [2023-12-20 10:18:17,657 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:17,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:17,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1757283202, now seen corresponding path program 3 times [2023-12-20 10:18:17,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:17,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669524672] [2023-12-20 10:18:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:17,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:17,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:17,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938432633] [2023-12-20 10:18:17,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:18:17,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:17,680 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) [2023-12-20 10:18:17,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 10:18:17,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 10:18:17,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-20 10:18:17,820 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-20 10:18:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-20 10:18:17,877 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-20 10:18:17,877 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-20 10:18:17,878 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 10:18:17,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:18,079 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 [2023-12-20 10:18:18,082 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-12-20 10:18:18,085 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 10:18:18,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 10:18:18 BoogieIcfgContainer [2023-12-20 10:18:18,123 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 10:18:18,124 INFO L158 Benchmark]: Toolchain (without parser) took 6020.57ms. Allocated memory was 182.5MB in the beginning and 267.4MB in the end (delta: 84.9MB). Free memory was 126.9MB in the beginning and 193.8MB in the end (delta: -66.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-12-20 10:18:18,124 INFO L158 Benchmark]: CDTParser took 0.59ms. Allocated memory is still 182.5MB. Free memory is still 133.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 10:18:18,124 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.62ms. Allocated memory is still 182.5MB. Free memory was 126.6MB in the beginning and 115.3MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 10:18:18,124 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.47ms. Allocated memory is still 182.5MB. Free memory was 115.3MB in the beginning and 113.6MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 10:18:18,125 INFO L158 Benchmark]: Boogie Preprocessor took 39.82ms. Allocated memory is still 182.5MB. Free memory was 113.6MB in the beginning and 111.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 10:18:18,125 INFO L158 Benchmark]: RCFGBuilder took 451.87ms. Allocated memory was 182.5MB in the beginning and 267.4MB in the end (delta: 84.9MB). Free memory was 111.2MB in the beginning and 236.2MB in the end (delta: -125.1MB). Peak memory consumption was 18.4MB. Max. memory is 8.0GB. [2023-12-20 10:18:18,125 INFO L158 Benchmark]: TraceAbstraction took 5277.58ms. Allocated memory is still 267.4MB. Free memory was 235.2MB in the beginning and 193.8MB in the end (delta: 41.4MB). Peak memory consumption was 41.4MB. Max. memory is 8.0GB. [2023-12-20 10:18:18,126 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59ms. Allocated memory is still 182.5MB. Free memory is still 133.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 219.62ms. Allocated memory is still 182.5MB. Free memory was 126.6MB in the beginning and 115.3MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.47ms. Allocated memory is still 182.5MB. Free memory was 115.3MB in the beginning and 113.6MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.82ms. Allocated memory is still 182.5MB. Free memory was 113.6MB in the beginning and 111.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 451.87ms. Allocated memory was 182.5MB in the beginning and 267.4MB in the end (delta: 84.9MB). Free memory was 111.2MB in the beginning and 236.2MB in the end (delta: -125.1MB). Peak memory consumption was 18.4MB. Max. memory is 8.0GB. * TraceAbstraction took 5277.58ms. Allocated memory is still 267.4MB. Free memory was 235.2MB in the beginning and 193.8MB in the end (delta: 41.4MB). Peak memory consumption was 41.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [N=3, \old(cond)=1, cond=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [N=3, a={-4:0}, b={-5:0}, c={-3:0}, i=0] [L32] COND TRUE i