/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-multidimensional/diff-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 09:06:24,471 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 09:06:24,549 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 09:06:24,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 09:06:24,556 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 09:06:24,582 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 09:06:24,582 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 09:06:24,583 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 09:06:24,583 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 09:06:24,586 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 09:06:24,587 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 09:06:24,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 09:06:24,587 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 09:06:24,589 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 09:06:24,589 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 09:06:24,589 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 09:06:24,589 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 09:06:24,590 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 09:06:24,590 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 09:06:24,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 09:06:24,590 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 09:06:24,591 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 09:06:24,591 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 09:06:24,591 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 09:06:24,591 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 09:06:24,591 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 09:06:24,592 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 09:06:24,592 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 09:06:24,592 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 09:06:24,592 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 09:06:24,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 09:06:24,594 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 09:06:24,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 09:06:24,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 09:06:24,595 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 09:06:24,595 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 09:06:24,595 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 09:06:24,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 09:06:24,595 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 09:06:24,595 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 09:06:24,596 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 09:06:24,596 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 09:06:24,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 09:06:24,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 09:06:24,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 09:06:24,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 09:06:24,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 09:06:24,841 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 09:06:24,842 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 09:06:24,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2023-12-20 09:06:25,907 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 09:06:26,096 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 09:06:26,098 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2023-12-20 09:06:26,105 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249d05833/ad7d64cbf6244de0809b0d26f43095c5/FLAGd40cea551 [2023-12-20 09:06:26,122 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249d05833/ad7d64cbf6244de0809b0d26f43095c5 [2023-12-20 09:06:26,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 09:06:26,126 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 09:06:26,128 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 09:06:26,129 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 09:06:26,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 09:06:26,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bb65c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26, skipping insertion in model container [2023-12-20 09:06:26,134 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,156 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 09:06:26,309 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-multidimensional/diff-2-n-u.c[322,335] [2023-12-20 09:06:26,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 09:06:26,354 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 09:06:26,365 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-multidimensional/diff-2-n-u.c[322,335] [2023-12-20 09:06:26,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 09:06:26,409 INFO L206 MainTranslator]: Completed translation [2023-12-20 09:06:26,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26 WrapperNode [2023-12-20 09:06:26,409 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 09:06:26,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 09:06:26,411 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 09:06:26,411 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 09:06:26,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,457 INFO L138 Inliner]: procedures = 14, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2023-12-20 09:06:26,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 09:06:26,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 09:06:26,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 09:06:26,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 09:06:26,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,473 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,501 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 2, 4, 4]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 5 writes are split as follows [0, 1, 2, 2]. [2023-12-20 09:06:26,502 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,502 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,512 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,522 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,523 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,527 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 09:06:26,528 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 09:06:26,528 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 09:06:26,529 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 09:06:26,529 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (1/1) ... [2023-12-20 09:06:26,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 09:06:26,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:26,561 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 09:06:26,573 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 09:06:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 09:06:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 09:06:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 09:06:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 09:06:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 09:06:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 09:06:26,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 09:06:26,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 09:06:26,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 09:06:26,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 09:06:26,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 09:06:26,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 09:06:26,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 09:06:26,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 09:06:26,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 09:06:26,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 09:06:26,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 09:06:26,690 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 09:06:26,694 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 09:06:26,847 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 09:06:26,875 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 09:06:26,875 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-12-20 09:06:26,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 09:06:26 BoogieIcfgContainer [2023-12-20 09:06:26,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 09:06:26,878 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 09:06:26,878 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 09:06:26,885 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 09:06:26,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 09:06:26" (1/3) ... [2023-12-20 09:06:26,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555e9104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 09:06:26, skipping insertion in model container [2023-12-20 09:06:26,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:06:26" (2/3) ... [2023-12-20 09:06:26,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555e9104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 09:06:26, skipping insertion in model container [2023-12-20 09:06:26,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 09:06:26" (3/3) ... [2023-12-20 09:06:26,890 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2023-12-20 09:06:26,907 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 09:06:26,907 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 09:06:26,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 09:06:26,950 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;@392bf1a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 09:06:26,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 09:06:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 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 09:06:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-20 09:06:26,960 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:26,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:26,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:26,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:26,965 INFO L85 PathProgramCache]: Analyzing trace with hash 682045502, now seen corresponding path program 1 times [2023-12-20 09:06:26,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:26,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914153962] [2023-12-20 09:06:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:26,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:27,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:06:27,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543175199] [2023-12-20 09:06:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:27,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:27,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:27,120 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 09:06:27,129 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 09:06:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:06:27,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 09:06:27,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:06:27,262 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 09:06:27,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 09:06:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:06:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914153962] [2023-12-20 09:06:27,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:06:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543175199] [2023-12-20 09:06:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543175199] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:06:27,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:06:27,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 09:06:27,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231174178] [2023-12-20 09:06:27,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:06:27,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 09:06:27,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:06:27,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 09:06:27,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 09:06:27,296 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 09:06:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:27,375 INFO L93 Difference]: Finished difference Result 46 states and 82 transitions. [2023-12-20 09:06:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 09:06:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2023-12-20 09:06:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:27,383 INFO L225 Difference]: With dead ends: 46 [2023-12-20 09:06:27,384 INFO L226 Difference]: Without dead ends: 23 [2023-12-20 09:06:27,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 09:06:27,393 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:27,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:06:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-20 09:06:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-12-20 09:06:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 09:06:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-12-20 09:06:27,417 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 11 [2023-12-20 09:06:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:27,417 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-12-20 09:06:27,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 09:06:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-12-20 09:06:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-20 09:06:27,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:27,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:27,424 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 09:06:27,621 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 09:06:27,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:27,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash 906927131, now seen corresponding path program 1 times [2023-12-20 09:06:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:27,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979436720] [2023-12-20 09:06:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:27,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:27,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:06:27,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687336557] [2023-12-20 09:06:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:27,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:27,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:27,643 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 09:06:27,645 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 09:06:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:06:27,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 09:06:27,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:06:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:06:27,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 09:06:27,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:06:27,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979436720] [2023-12-20 09:06:27,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:06:27,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687336557] [2023-12-20 09:06:27,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687336557] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:06:27,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:06:27,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 09:06:27,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845738101] [2023-12-20 09:06:27,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:06:27,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 09:06:27,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:06:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 09:06:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 09:06:27,738 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 09:06:27,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:27,785 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2023-12-20 09:06:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 09:06:27,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2023-12-20 09:06:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:27,787 INFO L225 Difference]: With dead ends: 53 [2023-12-20 09:06:27,787 INFO L226 Difference]: Without dead ends: 34 [2023-12-20 09:06:27,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 09:06:27,788 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:27,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 27 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:06:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-20 09:06:27,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2023-12-20 09:06:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 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 09:06:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-12-20 09:06:27,797 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2023-12-20 09:06:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:27,798 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-12-20 09:06:27,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 09:06:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-12-20 09:06:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-20 09:06:27,799 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:27,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:27,809 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 09:06:28,008 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 09:06:28,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:28,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:28,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2076451309, now seen corresponding path program 1 times [2023-12-20 09:06:28,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:28,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399022571] [2023-12-20 09:06:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:28,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:28,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:06:28,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926315411] [2023-12-20 09:06:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:28,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:28,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:28,024 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 09:06:28,044 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 09:06:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:06:28,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 09:06:28,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:06:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:06:28,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:06:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:06:28,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:06:28,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399022571] [2023-12-20 09:06:28,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:06:28,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926315411] [2023-12-20 09:06:28,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926315411] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:06:28,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:06:28,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-12-20 09:06:28,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410406081] [2023-12-20 09:06:28,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:06:28,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 09:06:28,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:06:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 09:06:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-12-20 09:06:28,194 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 09:06:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:28,342 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2023-12-20 09:06:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 09:06:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 15 [2023-12-20 09:06:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:28,343 INFO L225 Difference]: With dead ends: 77 [2023-12-20 09:06:28,343 INFO L226 Difference]: Without dead ends: 54 [2023-12-20 09:06:28,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-12-20 09:06:28,345 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:28,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 54 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:06:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-20 09:06:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2023-12-20 09:06:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 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 09:06:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-12-20 09:06:28,354 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 15 [2023-12-20 09:06:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:28,355 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-12-20 09:06:28,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 09:06:28,355 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-12-20 09:06:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 09:06:28,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:28,356 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:28,364 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 09:06:28,556 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 09:06:28,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:28,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1171619685, now seen corresponding path program 2 times [2023-12-20 09:06:28,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668263215] [2023-12-20 09:06:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:28,577 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:06:28,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922213430] [2023-12-20 09:06:28,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:06:28,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:28,585 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 09:06:28,601 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 09:06:28,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-20 09:06:28,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:06:28,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 09:06:28,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:06:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-20 09:06:28,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 09:06:28,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:06:28,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668263215] [2023-12-20 09:06:28,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:06:28,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922213430] [2023-12-20 09:06:28,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922213430] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:06:28,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:06:28,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 09:06:28,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114476925] [2023-12-20 09:06:28,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:06:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 09:06:28,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:06:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 09:06:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 09:06:28,714 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 09:06:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:28,773 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2023-12-20 09:06:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 09:06:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2023-12-20 09:06:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:28,778 INFO L225 Difference]: With dead ends: 106 [2023-12-20 09:06:28,778 INFO L226 Difference]: Without dead ends: 80 [2023-12-20 09:06:28,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 09:06:28,782 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:28,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:06:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-20 09:06:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 45. [2023-12-20 09:06:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 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 09:06:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2023-12-20 09:06:28,811 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 18 [2023-12-20 09:06:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:28,812 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2023-12-20 09:06:28,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 09:06:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2023-12-20 09:06:28,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 09:06:28,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:28,813 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:28,821 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 09:06:29,013 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 09:06:29,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:29,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:29,014 INFO L85 PathProgramCache]: Analyzing trace with hash 99192463, now seen corresponding path program 1 times [2023-12-20 09:06:29,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:29,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501130587] [2023-12-20 09:06:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:29,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:29,037 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:06:29,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91197946] [2023-12-20 09:06:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:29,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:29,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:29,045 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 09:06:29,066 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 09:06:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:06:29,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-20 09:06:29,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:06:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 09:06:29,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:06:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 09:06:29,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:06:29,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501130587] [2023-12-20 09:06:29,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:06:29,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91197946] [2023-12-20 09:06:29,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91197946] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:06:29,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:06:29,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-12-20 09:06:29,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187799181] [2023-12-20 09:06:29,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:06:29,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 09:06:29,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:06:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 09:06:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-12-20 09:06:29,277 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 09:06:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:29,473 INFO L93 Difference]: Finished difference Result 143 states and 184 transitions. [2023-12-20 09:06:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 09:06:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) Word has length 32 [2023-12-20 09:06:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:29,474 INFO L225 Difference]: With dead ends: 143 [2023-12-20 09:06:29,474 INFO L226 Difference]: Without dead ends: 100 [2023-12-20 09:06:29,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-12-20 09:06:29,476 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:29,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 65 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:06:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-20 09:06:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2023-12-20 09:06:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 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 09:06:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2023-12-20 09:06:29,491 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 32 [2023-12-20 09:06:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:29,491 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2023-12-20 09:06:29,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 09:06:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2023-12-20 09:06:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-20 09:06:29,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:29,492 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:29,500 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 09:06:29,698 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 09:06:29,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:29,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2136401137, now seen corresponding path program 2 times [2023-12-20 09:06:29,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:29,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395775434] [2023-12-20 09:06:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:29,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:06:29,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817713661] [2023-12-20 09:06:29,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:06:29,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:29,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:29,739 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 09:06:29,757 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 09:06:29,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:06:29,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:06:29,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-20 09:06:29,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:06:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-20 09:06:30,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:06:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-20 09:06:30,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:06:30,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395775434] [2023-12-20 09:06:30,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:06:30,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817713661] [2023-12-20 09:06:30,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817713661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:06:30,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:06:30,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-20 09:06:30,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933711427] [2023-12-20 09:06:30,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:06:30,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 09:06:30,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:06:30,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 09:06:30,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-12-20 09:06:30,241 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 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 09:06:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:30,757 INFO L93 Difference]: Finished difference Result 275 states and 346 transitions. [2023-12-20 09:06:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 09:06:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 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 50 [2023-12-20 09:06:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:30,758 INFO L225 Difference]: With dead ends: 275 [2023-12-20 09:06:30,758 INFO L226 Difference]: Without dead ends: 196 [2023-12-20 09:06:30,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 09:06:30,760 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 352 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:30,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 108 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 09:06:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-12-20 09:06:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 153. [2023-12-20 09:06:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 152 states have internal predecessors, (181), 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 09:06:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 181 transitions. [2023-12-20 09:06:30,789 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 181 transitions. Word has length 50 [2023-12-20 09:06:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:30,789 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 181 transitions. [2023-12-20 09:06:30,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 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 09:06:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 181 transitions. [2023-12-20 09:06:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-20 09:06:30,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:30,794 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:30,803 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 09:06:31,000 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 09:06:31,001 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:31,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1400755215, now seen corresponding path program 3 times [2023-12-20 09:06:31,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:31,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306147716] [2023-12-20 09:06:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:31,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:31,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:06:31,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10047836] [2023-12-20 09:06:31,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:06:31,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:31,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:31,055 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 09:06:31,075 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 09:06:31,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-20 09:06:31,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:06:31,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 09:06:31,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:06:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2023-12-20 09:06:31,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:06:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2023-12-20 09:06:31,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:06:31,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306147716] [2023-12-20 09:06:31,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:06:31,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10047836] [2023-12-20 09:06:31,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10047836] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:06:31,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:06:31,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-12-20 09:06:31,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921099388] [2023-12-20 09:06:31,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:06:31,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 09:06:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:06:31,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 09:06:31,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-12-20 09:06:31,429 INFO L87 Difference]: Start difference. First operand 153 states and 181 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 09:06:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:06:31,574 INFO L93 Difference]: Finished difference Result 718 states and 856 transitions. [2023-12-20 09:06:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 09:06:31,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) Word has length 86 [2023-12-20 09:06:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:06:31,576 INFO L225 Difference]: With dead ends: 718 [2023-12-20 09:06:31,577 INFO L226 Difference]: Without dead ends: 592 [2023-12-20 09:06:31,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-12-20 09:06:31,578 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 151 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:06:31,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 35 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:06:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-12-20 09:06:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 378. [2023-12-20 09:06:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.1007957559681698) internal successors, (415), 377 states have internal predecessors, (415), 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 09:06:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 415 transitions. [2023-12-20 09:06:31,633 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 415 transitions. Word has length 86 [2023-12-20 09:06:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:06:31,635 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 415 transitions. [2023-12-20 09:06:31,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 09:06:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 415 transitions. [2023-12-20 09:06:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-12-20 09:06:31,640 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:06:31,640 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:06:31,647 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 09:06:31,846 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 09:06:31,847 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:06:31,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:06:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1579122430, now seen corresponding path program 4 times [2023-12-20 09:06:31,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:06:31,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321727089] [2023-12-20 09:06:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:06:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:06:32,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:06:32,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204172272] [2023-12-20 09:06:32,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:06:32,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:06:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:06:32,011 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 09:06:32,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process Received shutdown request... [2023-12-20 09:21:12,822 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 09:21:12,823 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 09:21:13,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-20 09:21:14,029 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forcibly destroying the process [2023-12-20 09:21:14,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 137 [2023-12-20 09:21:14,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-20 09:21:14,079 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 09:21:14,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-20 09:21:14,079 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 312 with TraceHistMax 88,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-20 09:21:14,082 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1] [2023-12-20 09:21:14,083 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 09:21:14,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 09:21:14 BoogieIcfgContainer [2023-12-20 09:21:14,085 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 09:21:14,085 INFO L158 Benchmark]: Toolchain (without parser) took 887959.73ms. Allocated memory was 217.1MB in the beginning and 372.2MB in the end (delta: 155.2MB). Free memory was 163.5MB in the beginning and 237.4MB in the end (delta: -73.8MB). Peak memory consumption was 82.9MB. Max. memory is 8.0GB. [2023-12-20 09:21:14,085 INFO L158 Benchmark]: CDTParser took 0.49ms. Allocated memory is still 217.1MB. Free memory is still 165.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 09:21:14,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.05ms. Allocated memory is still 217.1MB. Free memory was 163.2MB in the beginning and 152.0MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-20 09:21:14,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.74ms. Allocated memory is still 217.1MB. Free memory was 152.0MB in the beginning and 150.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 09:21:14,086 INFO L158 Benchmark]: Boogie Preprocessor took 69.67ms. Allocated memory is still 217.1MB. Free memory was 150.2MB in the beginning and 147.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 09:21:14,086 INFO L158 Benchmark]: RCFGBuilder took 347.71ms. Allocated memory is still 217.1MB. Free memory was 147.8MB in the beginning and 133.5MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-20 09:21:14,086 INFO L158 Benchmark]: TraceAbstraction took 887207.14ms. Allocated memory was 217.1MB in the beginning and 372.2MB in the end (delta: 155.2MB). Free memory was 133.1MB in the beginning and 237.4MB in the end (delta: -104.3MB). Peak memory consumption was 52.5MB. Max. memory is 8.0GB. [2023-12-20 09:21:14,088 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49ms. Allocated memory is still 217.1MB. Free memory is still 165.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 281.05ms. Allocated memory is still 217.1MB. Free memory was 163.2MB in the beginning and 152.0MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.74ms. Allocated memory is still 217.1MB. Free memory was 152.0MB in the beginning and 150.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 69.67ms. Allocated memory is still 217.1MB. Free memory was 150.2MB in the beginning and 147.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 347.71ms. Allocated memory is still 217.1MB. Free memory was 147.8MB in the beginning and 133.5MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 887207.14ms. Allocated memory was 217.1MB in the beginning and 372.2MB in the end (delta: 155.2MB). Free memory was 133.1MB in the beginning and 237.4MB in the end (delta: -104.3MB). Peak memory consumption was 52.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 7). Cancelled while NwaCegarLoop was analyzing trace of length 312 with TraceHistMax 88,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 887.1s, OverallIterations: 8, TraceHistogramMax: 88, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 760 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 760 mSDsluCounter, 340 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 226 mSDsCounter, 405 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 388 IncrementalHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 405 mSolverCounterUnsat, 114 mSDtfsCounter, 388 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 418 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=378occurred in iteration=7, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 333 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 226 NumberOfCodeBlocks, 153 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 398 ConstructedInterpolants, 0 QuantifiedInterpolants, 988 SizeOfPredicates, 14 NumberOfNonLiveVariables, 1134 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 1808/1942 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown