./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/single_elem_safe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/single_elem_safe.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1aed9bc44add9424c35127ba8c0166402387241540742ea765fb4b7385c8271 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 15:00:09,055 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 15:00:09,111 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 15:00:09,119 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 15:00:09,119 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 15:00:09,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 15:00:09,150 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 15:00:09,150 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 15:00:09,151 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 15:00:09,152 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 15:00:09,152 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 15:00:09,152 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 15:00:09,153 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 15:00:09,154 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 15:00:09,156 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 15:00:09,156 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 15:00:09,157 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 15:00:09,157 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 15:00:09,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 15:00:09,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 15:00:09,158 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 15:00:09,158 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 15:00:09,158 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 15:00:09,159 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 15:00:09,159 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 15:00:09,159 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 15:00:09,159 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 15:00:09,160 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 15:00:09,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 15:00:09,160 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 15:00:09,160 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 15:00:09,160 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 15:00:09,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:00:09,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 15:00:09,161 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 15:00:09,161 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 15:00:09,162 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 15:00:09,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 15:00:09,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 15:00:09,166 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 15:00:09,166 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 15:00:09,166 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 15:00:09,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1aed9bc44add9424c35127ba8c0166402387241540742ea765fb4b7385c8271 [2024-10-12 15:00:09,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 15:00:09,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 15:00:09,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 15:00:09,508 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 15:00:09,509 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 15:00:09,510 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2024-10-12 15:00:10,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 15:00:11,104 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 15:00:11,104 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2024-10-12 15:00:11,112 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d0fb5e04/ab4c694769984dc7abed2c0379ca9a6c/FLAGbe5efbd4b [2024-10-12 15:00:11,506 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d0fb5e04/ab4c694769984dc7abed2c0379ca9a6c [2024-10-12 15:00:11,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 15:00:11,510 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 15:00:11,511 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 15:00:11,511 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 15:00:11,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 15:00:11,518 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b18076f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11, skipping insertion in model container [2024-10-12 15:00:11,521 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,547 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 15:00:11,711 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/single_elem_safe.i[809,822] [2024-10-12 15:00:11,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:00:11,739 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 15:00:11,752 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/single_elem_safe.i[809,822] [2024-10-12 15:00:11,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:00:11,779 INFO L204 MainTranslator]: Completed translation [2024-10-12 15:00:11,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11 WrapperNode [2024-10-12 15:00:11,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 15:00:11,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 15:00:11,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 15:00:11,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 15:00:11,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,794 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,814 INFO L138 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2024-10-12 15:00:11,815 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 15:00:11,816 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 15:00:11,816 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 15:00:11,816 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 15:00:11,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,831 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,849 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 4, 6]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-10-12 15:00:11,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,861 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,864 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 15:00:11,865 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 15:00:11,865 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 15:00:11,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 15:00:11,866 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (1/1) ... [2024-10-12 15:00:11,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:00:11,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:11,900 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) [2024-10-12 15:00:11,902 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 [2024-10-12 15:00:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-12 15:00:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-12 15:00:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-12 15:00:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 15:00:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 15:00:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 15:00:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 15:00:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-12 15:00:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-12 15:00:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-12 15:00:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 15:00:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 15:00:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 15:00:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 15:00:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 15:00:11,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 15:00:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 15:00:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 15:00:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 15:00:12,049 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 15:00:12,051 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 15:00:12,231 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-10-12 15:00:12,232 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 15:00:12,268 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 15:00:12,269 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 15:00:12,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:00:12 BoogieIcfgContainer [2024-10-12 15:00:12,270 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 15:00:12,271 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 15:00:12,271 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 15:00:12,275 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 15:00:12,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:00:11" (1/3) ... [2024-10-12 15:00:12,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6a5c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:00:12, skipping insertion in model container [2024-10-12 15:00:12,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:00:11" (2/3) ... [2024-10-12 15:00:12,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6a5c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:00:12, skipping insertion in model container [2024-10-12 15:00:12,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:00:12" (3/3) ... [2024-10-12 15:00:12,278 INFO L112 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2024-10-12 15:00:12,293 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 15:00:12,294 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 15:00:12,346 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 15:00:12,352 INFO L333 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, 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;@3ed9dd5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 15:00:12,353 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 15:00:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 15:00:12,363 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:12,363 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:12,364 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:12,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1253829282, now seen corresponding path program 1 times [2024-10-12 15:00:12,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:12,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902340883] [2024-10-12 15:00:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:12,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:12,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:12,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902340883] [2024-10-12 15:00:12,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902340883] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:00:12,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:00:12,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:00:12,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135856068] [2024-10-12 15:00:12,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:00:12,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 15:00:12,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 15:00:12,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:00:12,571 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:12,592 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2024-10-12 15:00:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 15:00:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-12 15:00:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:12,603 INFO L225 Difference]: With dead ends: 28 [2024-10-12 15:00:12,604 INFO L226 Difference]: Without dead ends: 15 [2024-10-12 15:00:12,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:00:12,612 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:12,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:00:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-12 15:00:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-12 15:00:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2024-10-12 15:00:12,644 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2024-10-12 15:00:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:12,644 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2024-10-12 15:00:12,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2024-10-12 15:00:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 15:00:12,645 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:12,645 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:12,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 15:00:12,646 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:12,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:12,646 INFO L85 PathProgramCache]: Analyzing trace with hash 541073737, now seen corresponding path program 1 times [2024-10-12 15:00:12,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:12,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612656908] [2024-10-12 15:00:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:12,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:12,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:12,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612656908] [2024-10-12 15:00:12,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612656908] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:00:12,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:00:12,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:00:12,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229998619] [2024-10-12 15:00:12,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:00:12,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 15:00:12,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:12,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 15:00:12,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:00:12,736 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:12,772 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2024-10-12 15:00:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 15:00:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-12 15:00:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:12,777 INFO L225 Difference]: With dead ends: 37 [2024-10-12 15:00:12,777 INFO L226 Difference]: Without dead ends: 28 [2024-10-12 15:00:12,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:00:12,779 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:12,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:00:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-12 15:00:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2024-10-12 15:00:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2024-10-12 15:00:12,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 8 [2024-10-12 15:00:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:12,787 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2024-10-12 15:00:12,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2024-10-12 15:00:12,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 15:00:12,789 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:12,789 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:12,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 15:00:12,790 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:12,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2118313137, now seen corresponding path program 1 times [2024-10-12 15:00:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:12,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467509124] [2024-10-12 15:00:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:12,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:12,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:12,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467509124] [2024-10-12 15:00:12,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467509124] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:00:12,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:00:12,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 15:00:12,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757704768] [2024-10-12 15:00:12,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:00:12,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 15:00:12,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:12,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 15:00:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:00:12,899 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:12,929 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2024-10-12 15:00:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 15:00:12,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-12 15:00:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:12,931 INFO L225 Difference]: With dead ends: 33 [2024-10-12 15:00:12,931 INFO L226 Difference]: Without dead ends: 19 [2024-10-12 15:00:12,931 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:00:12,933 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:12,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:00:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-12 15:00:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2024-10-12 15:00:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2024-10-12 15:00:12,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2024-10-12 15:00:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:12,938 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2024-10-12 15:00:12,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2024-10-12 15:00:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 15:00:12,938 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:12,938 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:12,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 15:00:12,939 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:12,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:12,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1725286127, now seen corresponding path program 1 times [2024-10-12 15:00:12,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:12,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453403641] [2024-10-12 15:00:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:12,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:13,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:13,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453403641] [2024-10-12 15:00:13,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453403641] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748446433] [2024-10-12 15:00:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:13,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:13,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:13,082 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) [2024-10-12 15:00:13,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 15:00:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:13,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 15:00:13,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:00:13,209 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:00:13,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748446433] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:00:13,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:00:13,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-10-12 15:00:13,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236070054] [2024-10-12 15:00:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:00:13,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 15:00:13,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 15:00:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 15:00:13,212 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:13,233 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2024-10-12 15:00:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 15:00:13,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-12 15:00:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:13,234 INFO L225 Difference]: With dead ends: 26 [2024-10-12 15:00:13,234 INFO L226 Difference]: Without dead ends: 18 [2024-10-12 15:00:13,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 15:00:13,237 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:13,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:00:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-12 15:00:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-12 15:00:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2024-10-12 15:00:13,245 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 12 [2024-10-12 15:00:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:13,246 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2024-10-12 15:00:13,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2024-10-12 15:00:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 15:00:13,246 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:13,247 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:13,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 15:00:13,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:13,448 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:13,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:13,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1725226545, now seen corresponding path program 1 times [2024-10-12 15:00:13,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:13,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434129610] [2024-10-12 15:00:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:13,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:13,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:13,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434129610] [2024-10-12 15:00:13,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434129610] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:13,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103871597] [2024-10-12 15:00:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:13,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:13,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:13,553 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) [2024-10-12 15:00:13,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 15:00:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:13,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 15:00:13,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:13,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:13,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103871597] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:13,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-12 15:00:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951310526] [2024-10-12 15:00:13,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:13,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 15:00:13,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 15:00:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-12 15:00:13,721 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:13,805 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2024-10-12 15:00:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 15:00:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-12 15:00:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:13,806 INFO L225 Difference]: With dead ends: 74 [2024-10-12 15:00:13,808 INFO L226 Difference]: Without dead ends: 64 [2024-10-12 15:00:13,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-12 15:00:13,809 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:13,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 72 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:00:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-12 15:00:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2024-10-12 15:00:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2024-10-12 15:00:13,821 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 51 transitions. Word has length 12 [2024-10-12 15:00:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:13,821 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 51 transitions. [2024-10-12 15:00:13,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 51 transitions. [2024-10-12 15:00:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-12 15:00:13,822 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:13,823 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:13,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 15:00:14,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:14,024 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:14,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash -974111453, now seen corresponding path program 2 times [2024-10-12 15:00:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:14,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566660129] [2024-10-12 15:00:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:14,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:14,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566660129] [2024-10-12 15:00:14,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566660129] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:14,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13185714] [2024-10-12 15:00:14,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:00:14,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:14,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:00:14,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 15:00:14,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:00:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:00:14,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 15:00:14,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:14,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:14,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13185714] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:14,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:14,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-12 15:00:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191939703] [2024-10-12 15:00:14,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:14,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-12 15:00:14,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:14,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-12 15:00:14,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-12 15:00:14,503 INFO L87 Difference]: Start difference. First operand 36 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:14,618 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2024-10-12 15:00:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 15:00:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-12 15:00:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:14,620 INFO L225 Difference]: With dead ends: 164 [2024-10-12 15:00:14,620 INFO L226 Difference]: Without dead ends: 154 [2024-10-12 15:00:14,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-12 15:00:14,621 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 305 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:14,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 156 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:00:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-10-12 15:00:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 72. [2024-10-12 15:00:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 71 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2024-10-12 15:00:14,630 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 24 [2024-10-12 15:00:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:14,630 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2024-10-12 15:00:14,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2024-10-12 15:00:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 15:00:14,632 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:14,632 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:14,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 15:00:14,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:14,837 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:14,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:14,837 INFO L85 PathProgramCache]: Analyzing trace with hash 416606727, now seen corresponding path program 3 times [2024-10-12 15:00:14,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:14,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937958069] [2024-10-12 15:00:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:14,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:15,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937958069] [2024-10-12 15:00:15,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937958069] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172957436] [2024-10-12 15:00:15,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:00:15,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:15,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:15,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:00:15,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 15:00:16,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-12 15:00:16,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:00:16,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 15:00:16,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:16,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:16,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172957436] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:16,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:16,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-12 15:00:16,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388830285] [2024-10-12 15:00:16,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:16,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-12 15:00:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-12 15:00:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-12 15:00:16,778 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:17,029 INFO L93 Difference]: Finished difference Result 344 states and 469 transitions. [2024-10-12 15:00:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-12 15:00:17,030 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-10-12 15:00:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:17,032 INFO L225 Difference]: With dead ends: 344 [2024-10-12 15:00:17,032 INFO L226 Difference]: Without dead ends: 334 [2024-10-12 15:00:17,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-12 15:00:17,034 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 760 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:17,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 324 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:00:17,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-10-12 15:00:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 144. [2024-10-12 15:00:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4895104895104896) internal successors, (213), 143 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 213 transitions. [2024-10-12 15:00:17,046 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 213 transitions. Word has length 48 [2024-10-12 15:00:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:17,046 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 213 transitions. [2024-10-12 15:00:17,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 213 transitions. [2024-10-12 15:00:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-12 15:00:17,049 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:17,049 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:17,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 15:00:17,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:17,253 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:17,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:17,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1285292081, now seen corresponding path program 4 times [2024-10-12 15:00:17,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:17,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556125054] [2024-10-12 15:00:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:17,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:18,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:18,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556125054] [2024-10-12 15:00:18,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556125054] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:18,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037590412] [2024-10-12 15:00:18,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:00:18,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:18,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:18,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:00:18,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 15:00:19,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:00:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:00:19,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-12 15:00:19,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:19,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:20,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037590412] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:20,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:20,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-10-12 15:00:20,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807900552] [2024-10-12 15:00:20,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:20,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-12 15:00:20,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-12 15:00:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-12 15:00:20,062 INFO L87 Difference]: Start difference. First operand 144 states and 213 transitions. Second operand has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:20,843 INFO L93 Difference]: Finished difference Result 704 states and 961 transitions. [2024-10-12 15:00:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-12 15:00:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-10-12 15:00:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:20,846 INFO L225 Difference]: With dead ends: 704 [2024-10-12 15:00:20,846 INFO L226 Difference]: Without dead ends: 694 [2024-10-12 15:00:20,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-12 15:00:20,849 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 2372 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2372 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:20,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2372 Valid, 660 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:00:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2024-10-12 15:00:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 288. [2024-10-12 15:00:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.494773519163763) internal successors, (429), 287 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 429 transitions. [2024-10-12 15:00:20,867 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 429 transitions. Word has length 96 [2024-10-12 15:00:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:20,867 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 429 transitions. [2024-10-12 15:00:20,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 429 transitions. [2024-10-12 15:00:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-10-12 15:00:20,878 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:20,878 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:20,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 15:00:21,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:21,083 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:21,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:21,084 INFO L85 PathProgramCache]: Analyzing trace with hash 906566495, now seen corresponding path program 5 times [2024-10-12 15:00:21,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:21,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735910804] [2024-10-12 15:00:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:21,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:00:23,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:23,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735910804] [2024-10-12 15:00:23,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735910804] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:23,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030591462] [2024-10-12 15:00:23,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:00:23,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:23,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:23,710 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:00:23,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process