./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-multidimensional/diff-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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-multidimensional/diff-2-n-u.c -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 cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 19:54:44,224 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 19:54:44,306 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 19:54:44,312 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 19:54:44,313 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 19:54:44,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 19:54:44,344 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 19:54:44,345 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 19:54:44,347 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 19:54:44,348 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 19:54:44,349 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 19:54:44,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 19:54:44,350 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 19:54:44,351 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 19:54:44,352 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 19:54:44,352 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 19:54:44,352 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 19:54:44,353 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 19:54:44,353 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 19:54:44,353 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 19:54:44,353 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 19:54:44,354 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 19:54:44,354 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 19:54:44,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 19:54:44,356 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 19:54:44,357 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 19:54:44,357 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 19:54:44,357 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 19:54:44,358 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 19:54:44,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 19:54:44,358 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 19:54:44,359 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 19:54:44,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:54:44,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 19:54:44,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 19:54:44,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 19:54:44,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 19:54:44,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 19:54:44,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 19:54:44,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 19:54:44,361 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 19:54:44,362 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 19:54:44,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 [2024-10-23 19:54:44,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 19:54:44,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 19:54:44,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 19:54:44,708 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 19:54:44,709 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 19:54:44,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2024-10-23 19:54:46,207 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 19:54:46,406 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 19:54:46,407 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2024-10-23 19:54:46,414 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b41a9ac2e/7c8c392fe4a34fd9b11aa2eb9c50d0a9/FLAG2048caf6c [2024-10-23 19:54:46,427 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b41a9ac2e/7c8c392fe4a34fd9b11aa2eb9c50d0a9 [2024-10-23 19:54:46,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 19:54:46,431 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 19:54:46,433 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 19:54:46,433 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 19:54:46,439 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 19:54:46,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe4a559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46, skipping insertion in model container [2024-10-23 19:54:46,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,465 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 19:54:46,640 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-multidimensional/diff-2-n-u.c[322,335] [2024-10-23 19:54:46,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:54:46,690 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 19:54:46,702 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-multidimensional/diff-2-n-u.c[322,335] [2024-10-23 19:54:46,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:54:46,733 INFO L204 MainTranslator]: Completed translation [2024-10-23 19:54:46,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46 WrapperNode [2024-10-23 19:54:46,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 19:54:46,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 19:54:46,735 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 19:54:46,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 19:54:46,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,765 INFO L138 Inliner]: procedures = 14, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2024-10-23 19:54:46,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 19:54:46,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 19:54:46,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 19:54:46,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 19:54:46,780 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,783 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,802 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 4, 2, 4]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 5 writes are split as follows [0, 2, 1, 2]. [2024-10-23 19:54:46,802 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,803 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,808 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,812 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,819 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 19:54:46,820 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 19:54:46,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 19:54:46,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 19:54:46,821 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (1/1) ... [2024-10-23 19:54:46,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:54:46,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:46,855 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) [2024-10-23 19:54:46,859 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 [2024-10-23 19:54:46,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 19:54:46,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 19:54:46,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 19:54:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-23 19:54:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-23 19:54:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 19:54:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 19:54:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 19:54:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-23 19:54:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-23 19:54:46,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 19:54:46,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 19:54:46,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 19:54:46,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 19:54:46,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-23 19:54:46,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-23 19:54:46,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 19:54:47,054 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 19:54:47,061 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 19:54:47,324 INFO L? ?]: Removed 21 outVars from TransFormulas that were not future-live. [2024-10-23 19:54:47,324 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 19:54:47,346 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 19:54:47,346 INFO L314 CfgBuilder]: Removed 8 assume(true) statements. [2024-10-23 19:54:47,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:54:47 BoogieIcfgContainer [2024-10-23 19:54:47,347 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 19:54:47,349 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 19:54:47,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 19:54:47,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 19:54:47,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:54:46" (1/3) ... [2024-10-23 19:54:47,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7293546e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:54:47, skipping insertion in model container [2024-10-23 19:54:47,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:54:46" (2/3) ... [2024-10-23 19:54:47,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7293546e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:54:47, skipping insertion in model container [2024-10-23 19:54:47,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:54:47" (3/3) ... [2024-10-23 19:54:47,362 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2024-10-23 19:54:47,382 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 19:54:47,382 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 19:54:47,451 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 19:54:47,459 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;@7f7ca502, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 19:54:47,460 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 19:54:47,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-23 19:54:47,470 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:47,471 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:47,472 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:47,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash 682045502, now seen corresponding path program 1 times [2024-10-23 19:54:47,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:47,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267915373] [2024-10-23 19:54:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:47,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:47,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267915373] [2024-10-23 19:54:47,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267915373] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:54:47,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:54:47,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 19:54:47,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34735297] [2024-10-23 19:54:47,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:54:47,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:54:47,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:47,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:54:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:54:47,865 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:47,950 INFO L93 Difference]: Finished difference Result 46 states and 82 transitions. [2024-10-23 19:54:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:54:47,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-23 19:54:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:47,961 INFO L225 Difference]: With dead ends: 46 [2024-10-23 19:54:47,961 INFO L226 Difference]: Without dead ends: 23 [2024-10-23 19:54:47,964 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 [2024-10-23 19:54:47,969 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:47,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-23 19:54:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2024-10-23 19:54:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2024-10-23 19:54:48,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 11 [2024-10-23 19:54:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:48,005 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2024-10-23 19:54:48,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2024-10-23 19:54:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-23 19:54:48,008 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:48,008 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:48,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 19:54:48,009 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:48,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:48,011 INFO L85 PathProgramCache]: Analyzing trace with hash 906927131, now seen corresponding path program 1 times [2024-10-23 19:54:48,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:48,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446209385] [2024-10-23 19:54:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:48,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:48,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:48,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446209385] [2024-10-23 19:54:48,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446209385] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:54:48,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:54:48,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 19:54:48,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733714865] [2024-10-23 19:54:48,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:54:48,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:54:48,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:54:48,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:48,207 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:48,272 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2024-10-23 19:54:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:54:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-23 19:54:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:48,274 INFO L225 Difference]: With dead ends: 48 [2024-10-23 19:54:48,274 INFO L226 Difference]: Without dead ends: 29 [2024-10-23 19:54:48,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:48,275 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:48,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:48,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-23 19:54:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2024-10-23 19:54:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-10-23 19:54:48,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2024-10-23 19:54:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:48,290 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-10-23 19:54:48,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-10-23 19:54:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-23 19:54:48,291 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:48,292 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:48,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-23 19:54:48,292 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:48,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2076451309, now seen corresponding path program 1 times [2024-10-23 19:54:48,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:48,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407516460] [2024-10-23 19:54:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:48,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 19:54:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407516460] [2024-10-23 19:54:48,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407516460] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:54:48,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:54:48,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 19:54:48,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599640596] [2024-10-23 19:54:48,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:54:48,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:54:48,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:48,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:54:48,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:48,438 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:48,515 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2024-10-23 19:54:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:54:48,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-23 19:54:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:48,517 INFO L225 Difference]: With dead ends: 58 [2024-10-23 19:54:48,517 INFO L226 Difference]: Without dead ends: 44 [2024-10-23 19:54:48,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:54:48,519 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:48,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-23 19:54:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2024-10-23 19:54:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2024-10-23 19:54:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-10-23 19:54:48,544 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2024-10-23 19:54:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:48,545 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-10-23 19:54:48,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-10-23 19:54:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-23 19:54:48,546 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:48,546 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:48,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-23 19:54:48,546 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:48,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:48,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1455549173, now seen corresponding path program 1 times [2024-10-23 19:54:48,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:48,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341173742] [2024-10-23 19:54:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:48,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 19:54:48,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:48,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341173742] [2024-10-23 19:54:48,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341173742] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:48,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011048590] [2024-10-23 19:54:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:48,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:48,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:48,716 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) [2024-10-23 19:54:48,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 19:54:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:48,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:54:48,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 19:54:48,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 19:54:48,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011048590] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:48,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:48,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-23 19:54:48,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671434637] [2024-10-23 19:54:48,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:48,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-23 19:54:48,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-23 19:54:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-10-23 19:54:48,941 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:49,093 INFO L93 Difference]: Finished difference Result 76 states and 102 transitions. [2024-10-23 19:54:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-23 19:54:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-23 19:54:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:49,095 INFO L225 Difference]: With dead ends: 76 [2024-10-23 19:54:49,096 INFO L226 Difference]: Without dead ends: 51 [2024-10-23 19:54:49,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-10-23 19:54:49,098 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:49,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 49 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-23 19:54:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-10-23 19:54:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-10-23 19:54:49,113 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 23 [2024-10-23 19:54:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:49,114 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-10-23 19:54:49,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-10-23 19:54:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-23 19:54:49,115 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:49,115 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:49,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:49,316 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 [2024-10-23 19:54:49,317 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:49,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash 99192463, now seen corresponding path program 2 times [2024-10-23 19:54:49,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:49,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760803574] [2024-10-23 19:54:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:49,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-23 19:54:49,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760803574] [2024-10-23 19:54:49,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760803574] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692028342] [2024-10-23 19:54:49,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:54:49,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:49,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:49,542 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) [2024-10-23 19:54:49,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 19:54:49,661 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:54:49,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:49,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-23 19:54:49,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-23 19:54:49,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-23 19:54:49,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692028342] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:49,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:49,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-10-23 19:54:49,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985798337] [2024-10-23 19:54:49,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:49,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-23 19:54:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-23 19:54:49,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-10-23 19:54:49,908 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 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) [2024-10-23 19:54:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:50,194 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2024-10-23 19:54:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-23 19:54:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-23 19:54:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:50,196 INFO L225 Difference]: With dead ends: 142 [2024-10-23 19:54:50,197 INFO L226 Difference]: Without dead ends: 99 [2024-10-23 19:54:50,199 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2024-10-23 19:54:50,201 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 272 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:50,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 90 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:54:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-23 19:54:50,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2024-10-23 19:54:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2024-10-23 19:54:50,220 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 32 [2024-10-23 19:54:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:50,220 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2024-10-23 19:54:50,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 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) [2024-10-23 19:54:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2024-10-23 19:54:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-23 19:54:50,221 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:50,221 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:50,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:50,422 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 [2024-10-23 19:54:50,422 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:50,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2136401137, now seen corresponding path program 3 times [2024-10-23 19:54:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:50,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884360767] [2024-10-23 19:54:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:50,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-23 19:54:50,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884360767] [2024-10-23 19:54:50,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884360767] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983034777] [2024-10-23 19:54:50,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:54:50,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:50,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:50,904 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) [2024-10-23 19:54:50,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 19:54:51,019 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-23 19:54:51,020 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:51,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:54:51,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-10-23 19:54:51,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-10-23 19:54:51,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983034777] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:51,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:51,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 19 [2024-10-23 19:54:51,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317254102] [2024-10-23 19:54:51,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:51,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-23 19:54:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-23 19:54:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-10-23 19:54:51,285 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 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) [2024-10-23 19:54:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:52,919 INFO L93 Difference]: Finished difference Result 503 states and 563 transitions. [2024-10-23 19:54:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-10-23 19:54:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-10-23 19:54:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:52,922 INFO L225 Difference]: With dead ends: 503 [2024-10-23 19:54:52,923 INFO L226 Difference]: Without dead ends: 424 [2024-10-23 19:54:52,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1513, Invalid=3179, Unknown=0, NotChecked=0, Total=4692 [2024-10-23 19:54:52,926 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 2088 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2088 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:52,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2088 Valid, 54 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-23 19:54:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-10-23 19:54:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 213. [2024-10-23 19:54:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1273584905660377) internal successors, (239), 212 states have internal predecessors, (239), 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) [2024-10-23 19:54:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 239 transitions. [2024-10-23 19:54:52,985 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 239 transitions. Word has length 50 [2024-10-23 19:54:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:52,986 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 239 transitions. [2024-10-23 19:54:52,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 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) [2024-10-23 19:54:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 239 transitions. [2024-10-23 19:54:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-10-23 19:54:52,995 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:52,996 INFO L215 NwaCegarLoop]: trace histogram [44, 44, 44, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:53,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:53,199 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 [2024-10-23 19:54:53,200 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:53,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:53,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1990295538, now seen corresponding path program 4 times [2024-10-23 19:54:53,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:53,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137483237] [2024-10-23 19:54:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:53,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 436 proven. 66 refuted. 0 times theorem prover too weak. 2930 trivial. 0 not checked. [2024-10-23 19:54:54,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:54,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137483237] [2024-10-23 19:54:54,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137483237] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:54,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242961486] [2024-10-23 19:54:54,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:54:54,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:54,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:54,311 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) [2024-10-23 19:54:54,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process