/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/list-simple/dll2c_insert_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 21:53:21,029 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 21:53:21,092 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 21:53:21,097 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 21:53:21,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 21:53:21,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 21:53:21,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 21:53:21,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 21:53:21,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 21:53:21,122 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 21:53:21,123 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 21:53:21,123 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 21:53:21,124 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 21:53:21,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 21:53:21,125 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 21:53:21,125 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 21:53:21,125 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 21:53:21,125 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 21:53:21,126 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 21:53:21,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 21:53:21,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 21:53:21,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 21:53:21,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 21:53:21,127 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 21:53:21,127 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 21:53:21,127 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 21:53:21,127 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 21:53:21,128 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 21:53:21,128 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 21:53:21,128 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 21:53:21,129 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 21:53:21,129 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 21:53:21,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:53:21,129 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 21:53:21,129 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 21:53:21,129 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 21:53:21,129 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 21:53:21,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 21:53:21,130 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 21:53:21,130 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 21:53:21,130 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 21:53:21,130 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 21:53:21,130 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 21:53:21,130 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 21:53:21,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 21:53:21,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 21:53:21,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 21:53:21,312 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 21:53:21,312 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 21:53:21,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_insert_equal.i [2023-12-15 21:53:22,232 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 21:53:22,419 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 21:53:22,419 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_insert_equal.i [2023-12-15 21:53:22,430 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5913c0260/554c2a6b26864e898d4b00b9bc4901d9/FLAG5d790c166 [2023-12-15 21:53:22,443 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5913c0260/554c2a6b26864e898d4b00b9bc4901d9 [2023-12-15 21:53:22,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 21:53:22,446 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 21:53:22,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 21:53:22,447 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 21:53:22,450 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 21:53:22,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,451 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c472f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22, skipping insertion in model container [2023-12-15 21:53:22,451 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,494 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 21:53:22,751 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_insert_equal.i[24877,24890] [2023-12-15 21:53:22,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:53:22,761 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 21:53:22,788 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_insert_equal.i[24877,24890] [2023-12-15 21:53:22,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:53:22,809 INFO L206 MainTranslator]: Completed translation [2023-12-15 21:53:22,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22 WrapperNode [2023-12-15 21:53:22,810 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 21:53:22,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 21:53:22,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 21:53:22,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 21:53:22,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,828 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,844 INFO L138 Inliner]: procedures = 127, calls = 53, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 156 [2023-12-15 21:53:22,844 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 21:53:22,845 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 21:53:22,845 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 21:53:22,845 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 21:53:22,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,855 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,872 INFO L175 MemorySlicer]: Split 35 memory accesses to 3 slices as follows [2, 22, 11]. 63 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 18 writes are split as follows [0, 17, 1]. [2023-12-15 21:53:22,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,872 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,878 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,882 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,883 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,885 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 21:53:22,886 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 21:53:22,886 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 21:53:22,886 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 21:53:22,886 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2023-12-15 21:53:22,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:53:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:53:22,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 21:53:22,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 21:53:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 21:53:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 21:53:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-15 21:53:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 21:53:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 21:53:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-15 21:53:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-12-15 21:53:22,941 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-12-15 21:53:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 21:53:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-12-15 21:53:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-12-15 21:53:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-12-15 21:53:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 21:53:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 21:53:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-15 21:53:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 21:53:22,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 21:53:23,043 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 21:53:23,044 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 21:53:23,235 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 21:53:23,261 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 21:53:23,261 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-15 21:53:23,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:53:23 BoogieIcfgContainer [2023-12-15 21:53:23,262 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 21:53:23,263 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 21:53:23,263 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 21:53:23,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 21:53:23,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:53:22" (1/3) ... [2023-12-15 21:53:23,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4481d748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:53:23, skipping insertion in model container [2023-12-15 21:53:23,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (2/3) ... [2023-12-15 21:53:23,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4481d748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:53:23, skipping insertion in model container [2023-12-15 21:53:23,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:53:23" (3/3) ... [2023-12-15 21:53:23,267 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2023-12-15 21:53:23,279 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 21:53:23,279 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 21:53:23,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 21:53:23,310 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;@29421be2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 21:53:23,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 21:53:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 21:53:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-15 21:53:23,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:53:23,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:53:23,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:53:23,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:53:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash -680816188, now seen corresponding path program 1 times [2023-12-15 21:53:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:53:23,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986866530] [2023-12-15 21:53:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:53:23,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:53:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:23,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 21:53:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:23,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-15 21:53:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 21:53:23,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:53:23,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986866530] [2023-12-15 21:53:23,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986866530] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:53:23,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:53:23,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:53:23,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467975374] [2023-12-15 21:53:23,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:53:23,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:53:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:53:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:53:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:53:23,646 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 21:53:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:53:23,715 INFO L93 Difference]: Finished difference Result 56 states and 83 transitions. [2023-12-15 21:53:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:53:23,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-12-15 21:53:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:53:23,721 INFO L225 Difference]: With dead ends: 56 [2023-12-15 21:53:23,721 INFO L226 Difference]: Without dead ends: 25 [2023-12-15 21:53:23,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:53:23,727 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:53:23,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:53:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-15 21:53:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-15 21:53:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 21:53:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2023-12-15 21:53:23,750 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 19 [2023-12-15 21:53:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:53:23,750 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2023-12-15 21:53:23,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 21:53:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2023-12-15 21:53:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-15 21:53:23,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:53:23,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:53:23,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 21:53:23,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:53:23,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:53:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1161558312, now seen corresponding path program 1 times [2023-12-15 21:53:23,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:53:23,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384088200] [2023-12-15 21:53:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:53:23,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:53:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:23,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 21:53:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:23,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-15 21:53:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 21:53:23,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:53:23,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384088200] [2023-12-15 21:53:23,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384088200] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:53:23,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:53:23,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:53:23,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80059838] [2023-12-15 21:53:23,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:53:23,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:53:23,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:53:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:53:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:53:23,873 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 21:53:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:53:23,936 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-12-15 21:53:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:53:23,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-12-15 21:53:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:53:23,937 INFO L225 Difference]: With dead ends: 35 [2023-12-15 21:53:23,937 INFO L226 Difference]: Without dead ends: 28 [2023-12-15 21:53:23,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:53:23,939 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:53:23,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:53:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-15 21:53:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-12-15 21:53:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 21:53:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-12-15 21:53:23,949 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 19 [2023-12-15 21:53:23,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:53:23,949 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-12-15 21:53:23,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 21:53:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-12-15 21:53:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 21:53:23,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:53:23,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:53:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 21:53:23,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:53:23,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:53:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash -112877035, now seen corresponding path program 1 times [2023-12-15 21:53:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:53:23,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201310696] [2023-12-15 21:53:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:53:23,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:53:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 21:53:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:24,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-15 21:53:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 21:53:24,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:53:24,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201310696] [2023-12-15 21:53:24,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201310696] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:53:24,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:53:24,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:53:24,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348343492] [2023-12-15 21:53:24,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:53:24,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:53:24,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:53:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:53:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:53:24,105 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 21:53:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:53:24,159 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2023-12-15 21:53:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:53:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-15 21:53:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:53:24,160 INFO L225 Difference]: With dead ends: 47 [2023-12-15 21:53:24,160 INFO L226 Difference]: Without dead ends: 28 [2023-12-15 21:53:24,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:53:24,162 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:53:24,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 61 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:53:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-15 21:53:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-15 21:53:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 21:53:24,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-12-15 21:53:24,170 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 20 [2023-12-15 21:53:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:53:24,170 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-12-15 21:53:24,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 21:53:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-12-15 21:53:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-15 21:53:24,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:53:24,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:53:24,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 21:53:24,172 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:53:24,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:53:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash 935091600, now seen corresponding path program 1 times [2023-12-15 21:53:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:53:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097046085] [2023-12-15 21:53:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:53:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:53:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:25,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 21:53:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:25,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-15 21:53:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:25,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-15 21:53:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 21:53:25,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:53:25,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097046085] [2023-12-15 21:53:25,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097046085] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:53:25,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553423852] [2023-12-15 21:53:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:53:25,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:53:25,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:53:25,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:53:25,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 21:53:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:26,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 121 conjunts are in the unsatisfiable core [2023-12-15 21:53:26,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:53:26,529 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 [2023-12-15 21:53:26,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 21:53:26,745 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-15 21:53:26,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-15 21:53:26,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 21:53:26,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-15 21:53:26,874 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-15 21:53:26,874 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2023-12-15 21:53:26,880 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 24 treesize of output 11 [2023-12-15 21:53:27,047 INFO L349 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2023-12-15 21:53:27,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 183 treesize of output 151 [2023-12-15 21:53:27,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:53:27,059 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 44 treesize of output 33 [2023-12-15 21:53:27,077 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 98 treesize of output 86 [2023-12-15 21:53:27,100 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 26 treesize of output 15 [2023-12-15 21:53:27,218 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-15 21:53:27,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 95 [2023-12-15 21:53:27,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 17 [2023-12-15 21:53:27,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2023-12-15 21:53:27,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 7 [2023-12-15 21:53:27,421 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-15 21:53:27,421 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 1 case distinctions, treesize of input 20 treesize of output 23 [2023-12-15 21:53:27,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:53:27,447 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-15 21:53:27,447 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 109 [2023-12-15 21:53:27,466 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-12-15 21:53:27,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-12-15 21:53:27,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 19 [2023-12-15 21:53:27,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-12-15 21:53:27,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2023-12-15 21:53:27,823 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 19 treesize of output 11 [2023-12-15 21:53:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:53:27,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:53:48,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553423852] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:53:48,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 21:53:48,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2023-12-15 21:53:48,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529630051] [2023-12-15 21:53:48,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 21:53:48,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-15 21:53:48,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:53:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-15 21:53:48,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2157, Unknown=35, NotChecked=0, Total=2352 [2023-12-15 21:53:48,764 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 43 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-15 21:53:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:53:51,053 INFO L93 Difference]: Finished difference Result 69 states and 93 transitions. [2023-12-15 21:53:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-15 21:53:51,055 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 28 [2023-12-15 21:53:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:53:51,056 INFO L225 Difference]: With dead ends: 69 [2023-12-15 21:53:51,056 INFO L226 Difference]: Without dead ends: 67 [2023-12-15 21:53:51,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=364, Invalid=4571, Unknown=35, NotChecked=0, Total=4970 [2023-12-15 21:53:51,058 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:53:51,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 354 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1136 Invalid, 1 Unknown, 0 Unchecked, 1.3s Time] [2023-12-15 21:53:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-15 21:53:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2023-12-15 21:53:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 21:53:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-12-15 21:53:51,064 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 28 [2023-12-15 21:53:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:53:51,064 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-12-15 21:53:51,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-15 21:53:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-12-15 21:53:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-15 21:53:51,065 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:53:51,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:53:51,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 21:53:51,265 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 [2023-12-15 21:53:51,266 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:53:51,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:53:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash 158692931, now seen corresponding path program 1 times [2023-12-15 21:53:51,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:53:51,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002486119] [2023-12-15 21:53:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:53:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:53:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:51,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 21:53:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:51,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-15 21:53:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:51,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-15 21:53:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 21:53:51,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:53:51,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002486119] [2023-12-15 21:53:51,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002486119] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:53:51,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:53:51,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:53:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056897021] [2023-12-15 21:53:51,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:53:51,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 21:53:51,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:53:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 21:53:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-15 21:53:51,382 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 21:53:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:53:51,434 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-12-15 21:53:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:53:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-15 21:53:51,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:53:51,435 INFO L225 Difference]: With dead ends: 45 [2023-12-15 21:53:51,435 INFO L226 Difference]: Without dead ends: 35 [2023-12-15 21:53:51,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:53:51,436 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:53:51,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:53:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-15 21:53:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-15 21:53:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 21:53:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2023-12-15 21:53:51,458 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 29 [2023-12-15 21:53:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:53:51,458 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2023-12-15 21:53:51,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 21:53:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2023-12-15 21:53:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-15 21:53:51,459 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:53:51,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:53:51,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-15 21:53:51,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:53:51,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:53:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash 458760797, now seen corresponding path program 2 times [2023-12-15 21:53:51,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:53:51,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704810584] [2023-12-15 21:53:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:53:51,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:53:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:51,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 21:53:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:51,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-15 21:53:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:51,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-15 21:53:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 21:53:51,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:53:51,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704810584] [2023-12-15 21:53:51,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704810584] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:53:51,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:53:51,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 21:53:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927736475] [2023-12-15 21:53:51,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:53:51,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:53:51,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:53:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:53:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:53:51,587 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 21:53:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:53:51,648 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-12-15 21:53:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:53:51,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-15 21:53:51,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:53:51,651 INFO L225 Difference]: With dead ends: 44 [2023-12-15 21:53:51,651 INFO L226 Difference]: Without dead ends: 33 [2023-12-15 21:53:51,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:53:51,652 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:53:51,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 62 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 21:53:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-15 21:53:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-15 21:53:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 21:53:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-12-15 21:53:51,660 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 29 [2023-12-15 21:53:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:53:51,660 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-12-15 21:53:51,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 21:53:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-12-15 21:53:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-15 21:53:51,662 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:53:51,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:53:51,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-15 21:53:51,662 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:53:51,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:53:51,662 INFO L85 PathProgramCache]: Analyzing trace with hash 976741128, now seen corresponding path program 1 times [2023-12-15 21:53:51,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:53:51,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868040760] [2023-12-15 21:53:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:53:51,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:53:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:52,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 21:53:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:52,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-15 21:53:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:52,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-15 21:53:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 21:53:52,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:53:52,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868040760] [2023-12-15 21:53:52,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868040760] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:53:52,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211863644] [2023-12-15 21:53:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:53:52,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:53:52,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:53:52,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:53:52,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 21:53:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:53:52,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-15 21:53:52,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:53:52,508 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 [2023-12-15 21:53:52,623 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-15 21:53:52,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-15 21:53:52,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 21:53:52,700 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-15 21:53:52,700 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-12-15 21:53:52,784 INFO L349 Elim1Store]: treesize reduction 74, result has 12.9 percent of original size [2023-12-15 21:53:52,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 162 [2023-12-15 21:53:52,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 134 treesize of output 94 [2023-12-15 21:53:52,803 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 121 treesize of output 56 [2023-12-15 21:53:52,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:53:52,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 17 [2023-12-15 21:53:52,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 7 [2023-12-15 21:53:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:53:52,934 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 75 treesize of output 52 [2023-12-15 21:53:52,945 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-15 21:53:52,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2023-12-15 21:53:53,283 INFO L349 Elim1Store]: treesize reduction 827, result has 22.3 percent of original size [2023-12-15 21:53:53,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 447 treesize of output 300 [2023-12-15 21:54:14,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:54:14,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 210 case distinctions, treesize of input 2831 treesize of output 4763 Received shutdown request... [2023-12-15 21:54:33,748 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:54:33,749 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:54:33,764 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 21:54:33,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-15 21:54:33,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-15 21:54:33,970 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-227-14-4-6-1 context. [2023-12-15 21:54:33,974 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-12-15 21:54:33,975 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 21:54:33,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:54:33 BoogieIcfgContainer [2023-12-15 21:54:33,977 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 21:54:33,977 INFO L158 Benchmark]: Toolchain (without parser) took 71531.19ms. Allocated memory was 189.8MB in the beginning and 921.7MB in the end (delta: 731.9MB). Free memory was 125.1MB in the beginning and 753.0MB in the end (delta: -627.9MB). Peak memory consumption was 445.4MB. Max. memory is 8.0GB. [2023-12-15 21:54:33,977 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory is still 140.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 21:54:33,977 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.13ms. Allocated memory is still 189.8MB. Free memory was 125.1MB in the beginning and 106.4MB in the end (delta: 18.7MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-12-15 21:54:33,978 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.91ms. Allocated memory is still 189.8MB. Free memory was 106.4MB in the beginning and 104.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 21:54:33,978 INFO L158 Benchmark]: Boogie Preprocessor took 40.79ms. Allocated memory is still 189.8MB. Free memory was 104.1MB in the beginning and 100.3MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2023-12-15 21:54:33,978 INFO L158 Benchmark]: RCFGBuilder took 375.96ms. Allocated memory was 189.8MB in the beginning and 285.2MB in the end (delta: 95.4MB). Free memory was 100.3MB in the beginning and 236.2MB in the end (delta: -135.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-15 21:54:33,978 INFO L158 Benchmark]: TraceAbstraction took 70713.53ms. Allocated memory was 285.2MB in the beginning and 921.7MB in the end (delta: 636.5MB). Free memory was 235.7MB in the beginning and 753.0MB in the end (delta: -517.3MB). Peak memory consumption was 459.0MB. Max. memory is 8.0GB. [2023-12-15 21:54:33,980 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 189.8MB. Free memory is still 140.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 363.13ms. Allocated memory is still 189.8MB. Free memory was 125.1MB in the beginning and 106.4MB in the end (delta: 18.7MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.91ms. Allocated memory is still 189.8MB. Free memory was 106.4MB in the beginning and 104.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.79ms. Allocated memory is still 189.8MB. Free memory was 104.1MB in the beginning and 100.3MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 375.96ms. Allocated memory was 189.8MB in the beginning and 285.2MB in the end (delta: 95.4MB). Free memory was 100.3MB in the beginning and 236.2MB in the end (delta: -135.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 70713.53ms. Allocated memory was 285.2MB in the beginning and 921.7MB in the end (delta: 636.5MB). Free memory was 235.7MB in the beginning and 753.0MB in the end (delta: -517.3MB). Peak memory consumption was 459.0MB. 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: 658]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 658). Cancelled while NwaCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-227-14-4-6-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 70.7s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 133 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 132 mSDsluCounter, 671 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 514 mSDsCounter, 60 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1276 IncrementalHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 60 mSolverCounterUnsat, 157 mSDtfsCounter, 1276 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 22.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 52, 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, 6 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 24.6s InterpolantComputationTime, 172 NumberOfCodeBlocks, 172 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 165 ConstructedInterpolants, 9 QuantifiedInterpolants, 1876 SizeOfPredicates, 28 NumberOfNonLiveVariables, 396 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 43/55 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