/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/verifythis/prefixsum_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:32:51,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:32:51,268 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 10:32:51,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:32:51,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:32:51,295 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:32:51,296 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:32:51,296 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:32:51,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:32:51,299 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:32:51,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:32:51,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:32:51,300 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:32:51,301 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:32:51,301 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:32:51,301 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:32:51,302 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:32:51,302 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:32:51,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:32:51,303 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:32:51,303 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:32:51,303 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:32:51,303 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:32:51,303 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:32:51,304 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:32:51,304 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:32:51,304 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:32:51,304 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:32:51,304 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:32:51,305 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:32:51,305 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:32:51,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:32:51,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:32:51,306 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:32:51,306 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:32:51,306 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:32:51,306 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:32:51,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:32:51,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:32:51,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:32:51,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:32:51,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:32:51,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:32:51,307 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:32:51,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:32:51,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:32:51,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:32:51,526 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:32:51,526 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:32:51,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_rec.c [2023-12-21 10:32:52,582 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:32:52,726 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:32:52,726 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_rec.c [2023-12-21 10:32:52,731 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5dd773c4/136dcb361c354c8a84b3c00d65be6f33/FLAGe006b2339 [2023-12-21 10:32:52,741 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5dd773c4/136dcb361c354c8a84b3c00d65be6f33 [2023-12-21 10:32:52,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:32:52,744 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:32:52,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:32:52,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:32:52,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:32:52,749 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,750 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31af6594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52, skipping insertion in model container [2023-12-21 10:32:52,750 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,768 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:32:52,857 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_rec.c[525,538] [2023-12-21 10:32:52,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:32:52,881 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:32:52,889 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_rec.c[525,538] [2023-12-21 10:32:52,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:32:52,907 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:32:52,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52 WrapperNode [2023-12-21 10:32:52,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:32:52,908 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:32:52,908 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:32:52,908 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:32:52,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,918 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,932 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2023-12-21 10:32:52,932 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:32:52,933 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:32:52,933 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:32:52,933 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:32:52,940 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,943 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,964 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2023-12-21 10:32:52,965 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,965 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,970 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,973 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,974 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,976 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:32:52,977 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:32:52,977 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:32:52,977 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:32:52,977 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (1/1) ... [2023-12-21 10:32:52,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:32:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:32:53,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 10:32:53,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 10:32:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:32:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 10:32:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 10:32:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:32:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 10:32:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2023-12-21 10:32:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2023-12-21 10:32:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 10:32:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 10:32:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-21 10:32:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2023-12-21 10:32:53,031 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2023-12-21 10:32:53,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:32:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:32:53,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 10:32:53,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 10:32:53,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-21 10:32:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-21 10:32:53,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 10:32:53,092 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:32:53,093 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:32:53,254 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:32:53,279 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:32:53,279 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-21 10:32:53,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:32:53 BoogieIcfgContainer [2023-12-21 10:32:53,280 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:32:53,281 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:32:53,281 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:32:53,283 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:32:53,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:32:52" (1/3) ... [2023-12-21 10:32:53,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f8b234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:32:53, skipping insertion in model container [2023-12-21 10:32:53,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:32:52" (2/3) ... [2023-12-21 10:32:53,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f8b234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:32:53, skipping insertion in model container [2023-12-21 10:32:53,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:32:53" (3/3) ... [2023-12-21 10:32:53,285 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2023-12-21 10:32:53,303 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:32:53,303 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:32:53,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:32:53,342 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;@f9f89b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:32:53,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:32:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 10:32:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 10:32:53,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:32:53,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:32:53,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:32:53,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:32:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1467293786, now seen corresponding path program 1 times [2023-12-21 10:32:53,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:32:53,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923747590] [2023-12-21 10:32:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:53,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:32:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:32:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:32:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 10:32:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-21 10:32:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-21 10:32:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 10:32:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:32:53,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:32:53,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923747590] [2023-12-21 10:32:53,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923747590] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:32:53,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:32:53,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 10:32:53,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472501371] [2023-12-21 10:32:53,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:32:53,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 10:32:53,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:32:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 10:32:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 10:32:53,575 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:32:53,631 INFO L93 Difference]: Finished difference Result 86 states and 118 transitions. [2023-12-21 10:32:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 10:32:53,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-12-21 10:32:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:32:53,637 INFO L225 Difference]: With dead ends: 86 [2023-12-21 10:32:53,637 INFO L226 Difference]: Without dead ends: 43 [2023-12-21 10:32:53,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 10:32:53,642 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:32:53,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 70 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:32:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-21 10:32:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-12-21 10:32:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 10:32:53,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2023-12-21 10:32:53,668 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 40 [2023-12-21 10:32:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:32:53,668 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2023-12-21 10:32:53,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:53,669 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2023-12-21 10:32:53,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 10:32:53,670 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:32:53,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:32:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 10:32:53,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:32:53,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:32:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash 563453910, now seen corresponding path program 1 times [2023-12-21 10:32:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:32:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042853449] [2023-12-21 10:32:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:53,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:32:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:32:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:32:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 10:32:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-21 10:32:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-21 10:32:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 10:32:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:32:53,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:32:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042853449] [2023-12-21 10:32:53,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042853449] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:32:53,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:32:53,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 10:32:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698218584] [2023-12-21 10:32:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:32:53,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 10:32:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:32:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 10:32:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-21 10:32:53,919 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:32:54,042 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2023-12-21 10:32:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 10:32:54,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-12-21 10:32:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:32:54,046 INFO L225 Difference]: With dead ends: 87 [2023-12-21 10:32:54,046 INFO L226 Difference]: Without dead ends: 64 [2023-12-21 10:32:54,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-21 10:32:54,049 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 18 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:32:54,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 172 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:32:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-21 10:32:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2023-12-21 10:32:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 10:32:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2023-12-21 10:32:54,074 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 40 [2023-12-21 10:32:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:32:54,075 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2023-12-21 10:32:54,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2023-12-21 10:32:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 10:32:54,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:32:54,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:32:54,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 10:32:54,079 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:32:54,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:32:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1281913256, now seen corresponding path program 1 times [2023-12-21 10:32:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:32:54,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533759495] [2023-12-21 10:32:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:32:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:32:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:32:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 10:32:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-21 10:32:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-21 10:32:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-21 10:32:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:32:54,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:32:54,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533759495] [2023-12-21 10:32:54,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533759495] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:32:54,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:32:54,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 10:32:54,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354421453] [2023-12-21 10:32:54,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:32:54,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 10:32:54,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:32:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 10:32:54,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-21 10:32:54,309 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:32:54,403 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2023-12-21 10:32:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 10:32:54,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-12-21 10:32:54,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:32:54,404 INFO L225 Difference]: With dead ends: 69 [2023-12-21 10:32:54,404 INFO L226 Difference]: Without dead ends: 59 [2023-12-21 10:32:54,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-21 10:32:54,406 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:32:54,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 199 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:32:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-21 10:32:54,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2023-12-21 10:32:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 10:32:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2023-12-21 10:32:54,416 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 40 [2023-12-21 10:32:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:32:54,416 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2023-12-21 10:32:54,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2023-12-21 10:32:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-21 10:32:54,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:32:54,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:32:54,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 10:32:54,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:32:54,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:32:54,421 INFO L85 PathProgramCache]: Analyzing trace with hash -615774205, now seen corresponding path program 1 times [2023-12-21 10:32:54,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:32:54,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762936391] [2023-12-21 10:32:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:54,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:32:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:32:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:32:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 10:32:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-21 10:32:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-21 10:32:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-21 10:32:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:32:54,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:32:54,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762936391] [2023-12-21 10:32:54,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762936391] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:32:54,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088805967] [2023-12-21 10:32:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:54,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:32:54,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:32:54,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:32:54,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 10:32:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:54,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 10:32:54,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:32:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:32:54,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:32:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:32:54,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088805967] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:32:54,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:32:54,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2023-12-21 10:32:54,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784853287] [2023-12-21 10:32:54,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:32:54,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 10:32:54,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:32:54,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 10:32:54,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-21 10:32:54,830 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-21 10:32:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:32:54,936 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2023-12-21 10:32:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 10:32:54,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 41 [2023-12-21 10:32:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:32:54,938 INFO L225 Difference]: With dead ends: 89 [2023-12-21 10:32:54,938 INFO L226 Difference]: Without dead ends: 66 [2023-12-21 10:32:54,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-21 10:32:54,941 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:32:54,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 167 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:32:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-21 10:32:54,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2023-12-21 10:32:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 10:32:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-12-21 10:32:54,950 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2023-12-21 10:32:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:32:54,951 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-12-21 10:32:54,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-21 10:32:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-12-21 10:32:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-21 10:32:54,951 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:32:54,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:32:54,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 10:32:55,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:32:55,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:32:55,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:32:55,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1987581503, now seen corresponding path program 1 times [2023-12-21 10:32:55,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:32:55,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675472437] [2023-12-21 10:32:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:55,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:32:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:55,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:32:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:55,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:32:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:55,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 10:32:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:55,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-21 10:32:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:55,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-21 10:32:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:55,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-21 10:32:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:32:55,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:32:55,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675472437] [2023-12-21 10:32:55,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675472437] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:32:55,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577134068] [2023-12-21 10:32:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:55,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:32:55,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:32:55,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:32:55,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 10:32:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:55,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 10:32:55,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:32:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 10:32:55,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:32:55,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577134068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:32:55,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:32:55,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2023-12-21 10:32:55,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225024659] [2023-12-21 10:32:55,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:32:55,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 10:32:55,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:32:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 10:32:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 10:32:55,343 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:32:55,373 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2023-12-21 10:32:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 10:32:55,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2023-12-21 10:32:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:32:55,373 INFO L225 Difference]: With dead ends: 85 [2023-12-21 10:32:55,374 INFO L226 Difference]: Without dead ends: 44 [2023-12-21 10:32:55,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-21 10:32:55,378 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 10:32:55,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 167 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:32:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-21 10:32:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-21 10:32:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 10:32:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-12-21 10:32:55,387 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 41 [2023-12-21 10:32:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:32:55,387 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-12-21 10:32:55,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-12-21 10:32:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 10:32:55,389 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:32:55,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:32:55,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 10:32:55,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:32:55,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:32:55,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:32:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1482859894, now seen corresponding path program 2 times [2023-12-21 10:32:55,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:32:55,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429773098] [2023-12-21 10:32:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:55,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:32:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:32:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:56,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:32:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:56,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 10:32:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:56,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-21 10:32:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:56,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-21 10:32:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:56,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-21 10:32:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 10:32:56,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:32:56,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429773098] [2023-12-21 10:32:56,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429773098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:32:56,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948463923] [2023-12-21 10:32:56,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:32:56,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:32:56,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:32:56,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:32:56,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 10:32:57,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-21 10:32:57,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:32:57,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-21 10:32:57,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:32:57,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-21 10:32:57,248 INFO L349 Elim1Store]: treesize reduction 39, result has 27.8 percent of original size [2023-12-21 10:32:57,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 31 [2023-12-21 10:32:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 10:32:57,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:32:57,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948463923] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:32:57,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:32:57,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [19] total 28 [2023-12-21 10:32:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787824086] [2023-12-21 10:32:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:32:57,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 10:32:57,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:32:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 10:32:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2023-12-21 10:32:57,326 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:32:57,629 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2023-12-21 10:32:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 10:32:57,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-12-21 10:32:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:32:57,631 INFO L225 Difference]: With dead ends: 67 [2023-12-21 10:32:57,631 INFO L226 Difference]: Without dead ends: 65 [2023-12-21 10:32:57,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2023-12-21 10:32:57,632 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:32:57,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 195 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:32:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-21 10:32:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2023-12-21 10:32:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-21 10:32:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2023-12-21 10:32:57,637 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 42 [2023-12-21 10:32:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:32:57,638 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2023-12-21 10:32:57,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:32:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2023-12-21 10:32:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 10:32:57,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:32:57,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:32:57,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 10:32:57,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:32:57,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:32:57,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:32:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2145524379, now seen corresponding path program 1 times [2023-12-21 10:32:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:32:57,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808874685] [2023-12-21 10:32:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:57,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:32:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:58,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:32:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:58,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:32:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:58,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 10:32:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:58,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-21 10:32:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:58,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-21 10:32:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:58,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-21 10:32:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 10:32:58,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:32:58,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808874685] [2023-12-21 10:32:58,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808874685] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:32:58,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417192787] [2023-12-21 10:32:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:32:58,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:32:58,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:32:58,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:32:58,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 10:32:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:32:58,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 113 conjunts are in the unsatisfiable core [2023-12-21 10:32:58,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:32:58,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-21 10:32:58,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-12-21 10:32:58,250 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-21 10:32:58,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-12-21 10:32:58,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-21 10:32:58,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-12-21 10:32:58,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2023-12-21 10:32:58,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-12-21 10:32:58,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2023-12-21 10:32:58,492 WARN L876 $PredicateComparison]: unable to prove that (exists ((upsweep_~left Int) (upsweep_~right Int) (upsweep_~a.offset Int)) (and (= (store |c_old(#memory_int#1)| |c_upsweep_#in~a.base| (let ((.cse1 (+ (* upsweep_~right 4) upsweep_~a.offset)) (.cse0 (select |c_old(#memory_int#1)| |c_upsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 (+ (* upsweep_~left 4) upsweep_~a.offset)))))) |c_#memory_int#1|) (<= |c_upsweep_#in~right| upsweep_~right) (<= upsweep_~right (+ upsweep_~left 1)) (<= upsweep_~left |c_upsweep_#in~left|))) is different from true [2023-12-21 10:32:58,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2023-12-21 10:32:58,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2023-12-21 10:32:58,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2023-12-21 10:32:58,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 61 [2023-12-21 10:32:58,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2023-12-21 10:32:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:32:58,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:32:59,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417192787] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:32:59,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:32:59,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 25] total 32 [2023-12-21 10:32:59,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168823151] [2023-12-21 10:32:59,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:32:59,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-21 10:32:59,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:32:59,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-21 10:32:59,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1197, Unknown=1, NotChecked=70, Total=1406 [2023-12-21 10:32:59,122 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 32 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-21 10:33:00,125 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_#t~malloc17#1.base_BEFORE_CALL_1| Int)) (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc17#1.base_BEFORE_CALL_1|) 1)) (exists ((upsweep_~left Int) (upsweep_~right Int) (upsweep_~a.offset Int)) (and (= (store |c_old(#memory_int#1)| |c_upsweep_#in~a.base| (let ((.cse1 (+ (* upsweep_~right 4) upsweep_~a.offset)) (.cse0 (select |c_old(#memory_int#1)| |c_upsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 (+ (* upsweep_~left 4) upsweep_~a.offset)))))) |c_#memory_int#1|) (<= |c_upsweep_#in~right| upsweep_~right) (<= upsweep_~right (+ upsweep_~left 1)) (<= upsweep_~left |c_upsweep_#in~left|)))) is different from true [2023-12-21 10:33:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:00,989 INFO L93 Difference]: Finished difference Result 148 states and 204 transitions. [2023-12-21 10:33:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-21 10:33:00,989 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 45 [2023-12-21 10:33:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:00,990 INFO L225 Difference]: With dead ends: 148 [2023-12-21 10:33:00,990 INFO L226 Difference]: Without dead ends: 116 [2023-12-21 10:33:00,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=511, Invalid=4187, Unknown=2, NotChecked=270, Total=4970 [2023-12-21 10:33:00,992 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 149 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:00,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 584 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1395 Invalid, 0 Unknown, 358 Unchecked, 0.9s Time] [2023-12-21 10:33:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-21 10:33:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2023-12-21 10:33:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 66 states have internal predecessors, (73), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (40), 22 states have call predecessors, (40), 22 states have call successors, (40) [2023-12-21 10:33:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2023-12-21 10:33:01,006 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 45 [2023-12-21 10:33:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:01,007 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2023-12-21 10:33:01,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-21 10:33:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2023-12-21 10:33:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-21 10:33:01,007 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:01,008 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:33:01,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 10:33:01,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:01,213 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:01,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:01,213 INFO L85 PathProgramCache]: Analyzing trace with hash 750175886, now seen corresponding path program 2 times [2023-12-21 10:33:01,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:01,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259486713] [2023-12-21 10:33:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:01,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:01,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:01,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:33:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:01,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 10:33:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:01,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-21 10:33:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:01,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-21 10:33:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:01,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-21 10:33:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 10:33:01,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:01,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259486713] [2023-12-21 10:33:01,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259486713] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:01,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586836665] [2023-12-21 10:33:01,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:33:01,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:01,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:33:01,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:33:01,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 10:33:01,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 10:33:01,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:33:01,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 10:33:01,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:33:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 10:33:01,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:33:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 10:33:01,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586836665] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:01,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:33:01,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 20 [2023-12-21 10:33:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430557855] [2023-12-21 10:33:01,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:33:01,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 10:33:01,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 10:33:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-12-21 10:33:01,647 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-21 10:33:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:01,708 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-12-21 10:33:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 10:33:01,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2023-12-21 10:33:01,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:01,710 INFO L225 Difference]: With dead ends: 114 [2023-12-21 10:33:01,710 INFO L226 Difference]: Without dead ends: 94 [2023-12-21 10:33:01,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-12-21 10:33:01,710 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 18 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:01,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 145 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:33:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-21 10:33:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2023-12-21 10:33:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 61 states have internal predecessors, (66), 19 states have call successors, (19), 6 states have call predecessors, (19), 9 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2023-12-21 10:33:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2023-12-21 10:33:01,721 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 46 [2023-12-21 10:33:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:01,721 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2023-12-21 10:33:01,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-21 10:33:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2023-12-21 10:33:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-21 10:33:01,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:01,722 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:33:01,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 10:33:01,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:01,927 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:01,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:01,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1521820544, now seen corresponding path program 1 times [2023-12-21 10:33:01,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:01,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655652814] [2023-12-21 10:33:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:01,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-21 10:33:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 10:33:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-21 10:33:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-21 10:33:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-21 10:33:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:33:02,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:02,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655652814] [2023-12-21 10:33:02,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655652814] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:02,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166379605] [2023-12-21 10:33:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:02,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:02,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:33:02,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:33:02,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 10:33:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 10:33:02,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:33:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 10:33:02,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:33:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 10:33:02,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166379605] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:33:02,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:33:02,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-12-21 10:33:02,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036118304] [2023-12-21 10:33:02,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:33:02,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 10:33:02,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 10:33:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-21 10:33:02,303 INFO L87 Difference]: Start difference. First operand 86 states and 117 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:33:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:02,417 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2023-12-21 10:33:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 10:33:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2023-12-21 10:33:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:02,420 INFO L225 Difference]: With dead ends: 105 [2023-12-21 10:33:02,420 INFO L226 Difference]: Without dead ends: 86 [2023-12-21 10:33:02,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-21 10:33:02,421 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 37 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:02,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:33:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-21 10:33:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2023-12-21 10:33:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.183673469387755) internal successors, (58), 52 states have internal predecessors, (58), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2023-12-21 10:33:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2023-12-21 10:33:02,439 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 49 [2023-12-21 10:33:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:02,440 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2023-12-21 10:33:02,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 10:33:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2023-12-21 10:33:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-21 10:33:02,440 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:02,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:33:02,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 10:33:02,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:02,645 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:02,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:02,646 INFO L85 PathProgramCache]: Analyzing trace with hash -406209831, now seen corresponding path program 1 times [2023-12-21 10:33:02,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:02,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876740804] [2023-12-21 10:33:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:02,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-21 10:33:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 10:33:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-21 10:33:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-21 10:33:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-21 10:33:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-12-21 10:33:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 10:33:02,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:02,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876740804] [2023-12-21 10:33:02,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876740804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:02,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480818784] [2023-12-21 10:33:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:02,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:02,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:33:02,828 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:33:02,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 10:33:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:02,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 10:33:02,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:33:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 10:33:03,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:33:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 10:33:03,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480818784] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:03,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:33:03,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 10] total 21 [2023-12-21 10:33:03,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504279542] [2023-12-21 10:33:03,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:33:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 10:33:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 10:33:03,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-12-21 10:33:03,168 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-21 10:33:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:03,250 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2023-12-21 10:33:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 10:33:03,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2023-12-21 10:33:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:03,251 INFO L225 Difference]: With dead ends: 81 [2023-12-21 10:33:03,251 INFO L226 Difference]: Without dead ends: 75 [2023-12-21 10:33:03,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-12-21 10:33:03,252 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:03,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 177 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:33:03,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-21 10:33:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2023-12-21 10:33:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 49 states have internal predecessors, (55), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (20), 15 states have call predecessors, (20), 15 states have call successors, (20) [2023-12-21 10:33:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2023-12-21 10:33:03,264 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 55 [2023-12-21 10:33:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:03,266 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2023-12-21 10:33:03,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-21 10:33:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2023-12-21 10:33:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-21 10:33:03,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:03,266 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:33:03,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 10:33:03,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:03,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:03,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash 588536146, now seen corresponding path program 2 times [2023-12-21 10:33:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:03,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378112917] [2023-12-21 10:33:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-21 10:33:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 10:33:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-21 10:33:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-21 10:33:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-21 10:33:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-21 10:33:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 10:33:03,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:03,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378112917] [2023-12-21 10:33:03,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378112917] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:03,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760241205] [2023-12-21 10:33:03,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 10:33:03,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:03,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:33:03,677 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:33:03,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 10:33:03,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-21 10:33:03,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 10:33:03,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-21 10:33:03,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:33:03,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-21 10:33:03,875 INFO L349 Elim1Store]: treesize reduction 39, result has 27.8 percent of original size [2023-12-21 10:33:03,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 31 [2023-12-21 10:33:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 10:33:03,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:33:03,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760241205] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:33:03,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:33:03,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2023-12-21 10:33:03,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450077467] [2023-12-21 10:33:03,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:33:03,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 10:33:03,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:03,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 10:33:03,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:33:03,917 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-21 10:33:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:04,131 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2023-12-21 10:33:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 10:33:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2023-12-21 10:33:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:04,132 INFO L225 Difference]: With dead ends: 79 [2023-12-21 10:33:04,132 INFO L226 Difference]: Without dead ends: 77 [2023-12-21 10:33:04,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-12-21 10:33:04,133 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:04,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 201 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:33:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-21 10:33:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2023-12-21 10:33:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.16) internal successors, (58), 51 states have internal predecessors, (58), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (20), 16 states have call predecessors, (20), 15 states have call successors, (20) [2023-12-21 10:33:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2023-12-21 10:33:04,139 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 54 [2023-12-21 10:33:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:04,140 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2023-12-21 10:33:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-21 10:33:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2023-12-21 10:33:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-21 10:33:04,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:04,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:33:04,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 10:33:04,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 10:33:04,345 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:04,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:04,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1028884799, now seen corresponding path program 1 times [2023-12-21 10:33:04,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:04,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683257865] [2023-12-21 10:33:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:04,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-21 10:33:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 10:33:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-21 10:33:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-21 10:33:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-21 10:33:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-21 10:33:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 10:33:04,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:04,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683257865] [2023-12-21 10:33:04,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683257865] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:04,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777024285] [2023-12-21 10:33:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:04,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:33:04,515 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:33:04,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 10:33:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 10:33:04,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:33:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 10:33:04,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:33:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 10:33:04,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777024285] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:33:04,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:33:04,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 23 [2023-12-21 10:33:04,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836245804] [2023-12-21 10:33:04,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:33:04,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 10:33:04,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 10:33:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-12-21 10:33:04,958 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 23 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 9 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 7 states have call predecessors, (20), 9 states have call successors, (20) [2023-12-21 10:33:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:05,220 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2023-12-21 10:33:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 10:33:05,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 9 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 7 states have call predecessors, (20), 9 states have call successors, (20) Word has length 57 [2023-12-21 10:33:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:05,220 INFO L225 Difference]: With dead ends: 83 [2023-12-21 10:33:05,221 INFO L226 Difference]: Without dead ends: 60 [2023-12-21 10:33:05,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-12-21 10:33:05,221 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:05,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 219 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 10:33:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-21 10:33:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2023-12-21 10:33:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-21 10:33:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-12-21 10:33:05,226 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 57 [2023-12-21 10:33:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:05,226 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-12-21 10:33:05,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 9 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (20), 7 states have call predecessors, (20), 9 states have call successors, (20) [2023-12-21 10:33:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-12-21 10:33:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 10:33:05,227 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:05,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:33:05,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 10:33:05,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:05,432 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:05,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1964766740, now seen corresponding path program 1 times [2023-12-21 10:33:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:05,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338554680] [2023-12-21 10:33:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:05,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-21 10:33:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-21 10:33:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-21 10:33:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-21 10:33:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-21 10:33:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-21 10:33:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-21 10:33:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 10:33:05,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:05,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338554680] [2023-12-21 10:33:05,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338554680] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:05,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408292507] [2023-12-21 10:33:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:05,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:05,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:33:05,682 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 10:33:05,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 10:33:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 173 conjunts are in the unsatisfiable core [2023-12-21 10:33:05,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:33:05,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-21 10:33:05,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-12-21 10:33:05,959 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-21 10:33:05,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-12-21 10:33:05,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-21 10:33:06,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-21 10:33:06,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-21 10:33:06,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-21 10:33:06,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-12-21 10:33:06,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-12-21 10:33:06,588 WARN L876 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int)) (and (<= |c_downsweep_#in~right| (+ downsweep_~left 1)) (<= downsweep_~left |c_downsweep_#in~left|) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 (select (select |c_#memory_int#1| |c_downsweep_#in~a.base|) .cse2))))))) is different from true [2023-12-21 10:33:06,724 WARN L876 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int) (downsweep_~right Int) (downsweep_~a.offset Int)) (and (<= |c_downsweep_#in~right| downsweep_~right) (= (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse2 (+ downsweep_~a.offset (* downsweep_~left 4)))) (store (let ((.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|)) (.cse1 (+ downsweep_~a.offset (* downsweep_~right 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse2) (select .cse0 .cse1)))) .cse2 (select (select |c_#memory_int#1| |c_downsweep_#in~a.base|) .cse2)))) |c_#memory_int#1|) (<= |c_downsweep_#in~left| downsweep_~left) (<= |c_downsweep_#in~a.offset| downsweep_~a.offset))) is different from true [2023-12-21 10:33:07,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 167 [2023-12-21 10:33:07,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 366 treesize of output 330 [2023-12-21 10:33:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2023-12-21 10:33:07,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:33:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408292507] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:08,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:33:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 38] total 45 [2023-12-21 10:33:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766334039] [2023-12-21 10:33:08,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:33:08,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-21 10:33:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-21 10:33:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2009, Unknown=2, NotChecked=182, Total=2352 [2023-12-21 10:33:08,478 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 45 states, 32 states have (on average 2.15625) internal successors, (69), 38 states have internal predecessors, (69), 14 states have call successors, (20), 3 states have call predecessors, (20), 9 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-21 10:33:14,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 10:33:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:26,533 INFO L93 Difference]: Finished difference Result 121 states and 174 transitions. [2023-12-21 10:33:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-21 10:33:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 32 states have (on average 2.15625) internal successors, (69), 38 states have internal predecessors, (69), 14 states have call successors, (20), 3 states have call predecessors, (20), 9 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) Word has length 65 [2023-12-21 10:33:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:26,535 INFO L225 Difference]: With dead ends: 121 [2023-12-21 10:33:26,535 INFO L226 Difference]: Without dead ends: 94 [2023-12-21 10:33:26,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=655, Invalid=7539, Unknown=4, NotChecked=358, Total=8556 [2023-12-21 10:33:26,537 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 137 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 110 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:26,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 448 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1642 Invalid, 2 Unknown, 251 Unchecked, 6.6s Time] [2023-12-21 10:33:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-21 10:33:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2023-12-21 10:33:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 56 states have internal predecessors, (62), 19 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (35), 20 states have call predecessors, (35), 19 states have call successors, (35) [2023-12-21 10:33:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 116 transitions. [2023-12-21 10:33:26,548 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 116 transitions. Word has length 65 [2023-12-21 10:33:26,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:26,548 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 116 transitions. [2023-12-21 10:33:26,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 32 states have (on average 2.15625) internal successors, (69), 38 states have internal predecessors, (69), 14 states have call successors, (20), 3 states have call predecessors, (20), 9 states have return successors, (20), 12 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-21 10:33:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 116 transitions. [2023-12-21 10:33:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-21 10:33:26,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:26,549 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:33:26,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 10:33:26,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 10:33:26,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:26,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1374326025, now seen corresponding path program 1 times [2023-12-21 10:33:26,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:26,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776181200] [2023-12-21 10:33:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:26,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:30,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:30,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-21 10:33:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:30,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-21 10:33:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:30,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-21 10:33:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:30,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-21 10:33:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:31,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:31,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-21 10:33:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:31,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-12-21 10:33:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-21 10:47:11,473 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 10:47:11,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-21 10:47:11,474 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 68 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∨-2-3-2-58-5-66-5-24-5-22-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-17-5-7-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-118-21-66-21-24-16-22-21-21-21-21-21-21-17-21-21-21-16-21-5-21-5-21-5-21-5-21-5-21-5-17-3-5-2-3-2-1 context. [2023-12-21 10:47:11,477 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:47:11,480 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 10:47:11,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:47:11 BoogieIcfgContainer [2023-12-21 10:47:11,484 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 10:47:11,484 INFO L158 Benchmark]: Toolchain (without parser) took 858740.32ms. Allocated memory was 371.2MB in the beginning and 2.1GB in the end (delta: 1.7GB). Free memory was 325.6MB in the beginning and 620.1MB in the end (delta: -294.4MB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2023-12-21 10:47:11,486 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 [2023-12-21 10:47:11,487 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 208.7MB. Free memory is still 156.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 10:47:11,487 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.91ms. Allocated memory is still 371.2MB. Free memory was 325.6MB in the beginning and 313.6MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 10:47:11,487 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.35ms. Allocated memory is still 371.2MB. Free memory was 313.6MB in the beginning and 312.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 10:47:11,488 INFO L158 Benchmark]: Boogie Preprocessor took 43.49ms. Allocated memory is still 371.2MB. Free memory was 311.5MB in the beginning and 309.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 10:47:11,488 INFO L158 Benchmark]: RCFGBuilder took 303.21ms. Allocated memory is still 371.2MB. Free memory was 309.4MB in the beginning and 292.1MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-21 10:47:11,489 INFO L158 Benchmark]: TraceAbstraction took 858202.38ms. Allocated memory was 371.2MB in the beginning and 2.1GB in the end (delta: 1.7GB). Free memory was 291.0MB in the beginning and 620.1MB in the end (delta: -329.0MB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2023-12-21 10:47:11,493 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 208.7MB. Free memory is still 156.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 161.91ms. Allocated memory is still 371.2MB. Free memory was 325.6MB in the beginning and 313.6MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.35ms. Allocated memory is still 371.2MB. Free memory was 313.6MB in the beginning and 312.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.49ms. Allocated memory is still 371.2MB. Free memory was 311.5MB in the beginning and 309.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 303.21ms. Allocated memory is still 371.2MB. Free memory was 309.4MB in the beginning and 292.1MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 858202.38ms. Allocated memory was 371.2MB in the beginning and 2.1GB in the end (delta: 1.7GB). Free memory was 291.0MB in the beginning and 620.1MB in the end (delta: -329.0MB). Peak memory consumption was 1.8GB. 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: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was analyzing trace of length 68 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∨-2-3-2-58-5-66-5-24-5-22-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-21-5-17-5-7-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-118-21-66-21-24-16-22-21-21-21-21-21-21-17-21-21-21-16-21-5-21-5-21-5-21-5-21-5-21-5-17-3-5-2-3-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 858.1s, OverallIterations: 14, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 21.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 572 SdHoareTripleChecker+Valid, 8.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 532 mSDsluCounter, 3055 SdHoareTripleChecker+Invalid, 8.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 609 IncrementalHoareTripleChecker+Unchecked, 2545 mSDsCounter, 275 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4869 IncrementalHoareTripleChecker+Invalid, 5755 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 275 mSolverCounterUnsat, 510 mSDtfsCounter, 4869 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1123 GetRequests, 793 SyntacticMatches, 12 SemanticMatches, 318 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3955 ImplicationChecksByTransitivity, 15.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=7, InterpolantAutomatonStates: 190, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 127 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 1110 NumberOfCodeBlocks, 1070 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1330 ConstructedInterpolants, 19 QuantifiedInterpolants, 8631 SizeOfPredicates, 134 NumberOfNonLiveVariables, 2467 ConjunctsInSsa, 442 ConjunctsInUnsatCore, 28 InterpolantComputations, 8 PerfectInterpolantSequences, 362/449 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