./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 ef2ac183abfa5be888591001d2f7376a659c701d3e7fb64cad1cba56a829d8b3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 01:48:33,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 01:48:33,806 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 01:48:33,812 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 01:48:33,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 01:48:33,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 01:48:33,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 01:48:33,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 01:48:33,849 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 01:48:33,850 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 01:48:33,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 01:48:33,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 01:48:33,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 01:48:33,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 01:48:33,854 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 01:48:33,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 01:48:33,855 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 01:48:33,855 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 01:48:33,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 01:48:33,856 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 01:48:33,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 01:48:33,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 01:48:33,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 01:48:33,860 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 01:48:33,861 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 01:48:33,861 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 01:48:33,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 01:48:33,861 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 01:48:33,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 01:48:33,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 01:48:33,862 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 01:48:33,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 01:48:33,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:48:33,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 01:48:33,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 01:48:33,863 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 01:48:33,864 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 01:48:33,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 01:48:33,865 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 01:48:33,865 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 01:48:33,865 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 01:48:33,866 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 01:48:33,866 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef2ac183abfa5be888591001d2f7376a659c701d3e7fb64cad1cba56a829d8b3 [2024-10-11 01:48:34,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 01:48:34,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 01:48:34,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 01:48:34,166 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 01:48:34,167 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 01:48:34,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2024-10-11 01:48:35,689 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 01:48:35,875 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 01:48:35,877 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2024-10-11 01:48:35,892 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/6a1cffb11/13d9a5fe96be48039829f5d3ab069a89/FLAGcbd55acc6 [2024-10-11 01:48:35,908 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/6a1cffb11/13d9a5fe96be48039829f5d3ab069a89 [2024-10-11 01:48:35,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 01:48:35,912 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 01:48:35,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 01:48:35,916 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 01:48:35,921 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 01:48:35,922 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:48:35" (1/1) ... [2024-10-11 01:48:35,923 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e331163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:35, skipping insertion in model container [2024-10-11 01:48:35,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:48:35" (1/1) ... [2024-10-11 01:48:35,944 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 01:48:36,119 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/loop-acceleration/array_2-1-simple.i[809,822] [2024-10-11 01:48:36,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:48:36,143 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 01:48:36,155 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/loop-acceleration/array_2-1-simple.i[809,822] [2024-10-11 01:48:36,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:48:36,175 INFO L204 MainTranslator]: Completed translation [2024-10-11 01:48:36,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36 WrapperNode [2024-10-11 01:48:36,176 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 01:48:36,177 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 01:48:36,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 01:48:36,177 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 01:48:36,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,191 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,207 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-10-11 01:48:36,208 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 01:48:36,209 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 01:48:36,209 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 01:48:36,209 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 01:48:36,219 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,222 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,233 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 5 writes are split as follows [0, 3, 2]. [2024-10-11 01:48:36,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,242 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,249 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,250 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,251 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,253 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 01:48:36,254 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 01:48:36,254 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 01:48:36,254 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 01:48:36,255 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (1/1) ... [2024-10-11 01:48:36,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:48:36,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:36,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 01:48:36,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 01:48:36,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 01:48:36,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 01:48:36,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 01:48:36,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 01:48:36,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-10-11 01:48:36,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-10-11 01:48:36,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-10-11 01:48:36,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 01:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 01:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 01:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 01:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 01:48:36,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 01:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 01:48:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 01:48:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 01:48:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 01:48:36,444 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 01:48:36,445 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 01:48:36,554 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-11 01:48:36,554 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 01:48:36,579 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 01:48:36,580 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 01:48:36,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:48:36 BoogieIcfgContainer [2024-10-11 01:48:36,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 01:48:36,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 01:48:36,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 01:48:36,586 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 01:48:36,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:48:35" (1/3) ... [2024-10-11 01:48:36,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794f7c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:48:36, skipping insertion in model container [2024-10-11 01:48:36,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:48:36" (2/3) ... [2024-10-11 01:48:36,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794f7c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:48:36, skipping insertion in model container [2024-10-11 01:48:36,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:48:36" (3/3) ... [2024-10-11 01:48:36,589 INFO L112 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2024-10-11 01:48:36,607 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 01:48:36,608 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 01:48:36,719 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 01:48:36,726 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;@57c45fb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 01:48:36,728 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 01:48:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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) [2024-10-11 01:48:36,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 01:48:36,736 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:36,737 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 01:48:36,738 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:36,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash 58436137, now seen corresponding path program 1 times [2024-10-11 01:48:36,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:36,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675856843] [2024-10-11 01:48:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:36,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:36,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675856843] [2024-10-11 01:48:36,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675856843] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:48:36,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 01:48:36,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 01:48:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790780552] [2024-10-11 01:48:37,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:48:37,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 01:48:37,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:37,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 01:48:37,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 01:48:37,036 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2024-10-11 01:48:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:37,062 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2024-10-11 01:48:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 01:48:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2024-10-11 01:48:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:37,069 INFO L225 Difference]: With dead ends: 15 [2024-10-11 01:48:37,069 INFO L226 Difference]: Without dead ends: 7 [2024-10-11 01:48:37,071 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 [2024-10-11 01:48:37,074 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:37,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:48:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2024-10-11 01:48:37,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2024-10-11 01:48:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2024-10-11 01:48:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2024-10-11 01:48:37,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2024-10-11 01:48:37,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:37,098 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2024-10-11 01:48:37,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2024-10-11 01:48:37,098 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2024-10-11 01:48:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 01:48:37,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:37,099 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 01:48:37,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 01:48:37,099 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:37,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:37,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1835290541, now seen corresponding path program 1 times [2024-10-11 01:48:37,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:37,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58976325] [2024-10-11 01:48:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:37,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58976325] [2024-10-11 01:48:37,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58976325] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:37,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802945998] [2024-10-11 01:48:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:37,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:37,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:37,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:37,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 01:48:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:37,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 01:48:37,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:37,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:37,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802945998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:37,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:37,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 01:48:37,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647111762] [2024-10-11 01:48:37,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:37,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 01:48:37,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:37,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 01:48:37,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 01:48:37,375 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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) [2024-10-11 01:48:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:37,394 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2024-10-11 01:48:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 01:48:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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 6 [2024-10-11 01:48:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:37,395 INFO L225 Difference]: With dead ends: 14 [2024-10-11 01:48:37,395 INFO L226 Difference]: Without dead ends: 10 [2024-10-11 01:48:37,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 01:48:37,397 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:37,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:48:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-10-11 01:48:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-10-11 01:48:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2024-10-11 01:48:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2024-10-11 01:48:37,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2024-10-11 01:48:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:37,401 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2024-10-11 01:48:37,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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) [2024-10-11 01:48:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2024-10-11 01:48:37,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 01:48:37,403 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:37,403 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2024-10-11 01:48:37,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 01:48:37,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:37,606 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:37,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:37,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1959072983, now seen corresponding path program 2 times [2024-10-11 01:48:37,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:37,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998642168] [2024-10-11 01:48:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:37,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:37,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998642168] [2024-10-11 01:48:37,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998642168] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:37,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083847284] [2024-10-11 01:48:37,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:48:37,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:37,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:37,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:37,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 01:48:37,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:48:37,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:48:37,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 01:48:37,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:37,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:38,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083847284] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:38,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:38,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 01:48:38,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428246307] [2024-10-11 01:48:38,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:38,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 01:48:38,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 01:48:38,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 01:48:38,013 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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) [2024-10-11 01:48:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:38,042 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2024-10-11 01:48:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 01:48:38,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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 9 [2024-10-11 01:48:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:38,044 INFO L225 Difference]: With dead ends: 20 [2024-10-11 01:48:38,044 INFO L226 Difference]: Without dead ends: 16 [2024-10-11 01:48:38,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 01:48:38,046 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:38,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:48:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-11 01:48:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-11 01:48:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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) [2024-10-11 01:48:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2024-10-11 01:48:38,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2024-10-11 01:48:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:38,056 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2024-10-11 01:48:38,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 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) [2024-10-11 01:48:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2024-10-11 01:48:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 01:48:38,056 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:38,057 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2024-10-11 01:48:38,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 01:48:38,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:38,258 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:38,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash -955392855, now seen corresponding path program 3 times [2024-10-11 01:48:38,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:38,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453753961] [2024-10-11 01:48:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:38,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:38,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453753961] [2024-10-11 01:48:38,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453753961] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837901942] [2024-10-11 01:48:38,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 01:48:38,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:38,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:38,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:38,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 01:48:38,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-11 01:48:38,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:48:38,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 01:48:38,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:38,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:39,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837901942] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:39,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:39,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-11 01:48:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507411458] [2024-10-11 01:48:39,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:39,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 01:48:39,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 01:48:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-11 01:48:39,025 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 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) [2024-10-11 01:48:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:39,057 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2024-10-11 01:48:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 01:48:39,058 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 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 [2024-10-11 01:48:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:39,059 INFO L225 Difference]: With dead ends: 32 [2024-10-11 01:48:39,059 INFO L226 Difference]: Without dead ends: 28 [2024-10-11 01:48:39,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-11 01:48:39,060 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:39,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:48:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-11 01:48:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-11 01:48:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 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) [2024-10-11 01:48:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2024-10-11 01:48:39,067 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 15 [2024-10-11 01:48:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:39,067 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2024-10-11 01:48:39,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 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) [2024-10-11 01:48:39,068 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2024-10-11 01:48:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-11 01:48:39,069 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:39,069 INFO L215 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2024-10-11 01:48:39,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 01:48:39,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:39,271 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:39,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:39,271 INFO L85 PathProgramCache]: Analyzing trace with hash 968515497, now seen corresponding path program 4 times [2024-10-11 01:48:39,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:39,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240000397] [2024-10-11 01:48:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:39,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:39,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240000397] [2024-10-11 01:48:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240000397] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864445800] [2024-10-11 01:48:39,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 01:48:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:39,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:39,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 01:48:40,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 01:48:40,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:48:40,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 01:48:40,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:40,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:40,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864445800] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:40,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:40,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-10-11 01:48:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094006592] [2024-10-11 01:48:40,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:40,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-11 01:48:40,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-11 01:48:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-11 01:48:40,895 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:48:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:40,965 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2024-10-11 01:48:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-11 01:48:40,965 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-11 01:48:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:40,966 INFO L225 Difference]: With dead ends: 56 [2024-10-11 01:48:40,967 INFO L226 Difference]: Without dead ends: 52 [2024-10-11 01:48:40,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-11 01:48:40,969 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:40,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:48:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-11 01:48:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-11 01:48:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 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) [2024-10-11 01:48:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2024-10-11 01:48:40,976 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 27 [2024-10-11 01:48:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:40,977 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2024-10-11 01:48:40,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:48:40,977 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2024-10-11 01:48:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-11 01:48:40,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:40,978 INFO L215 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2024-10-11 01:48:40,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 01:48:41,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:41,183 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:41,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:41,183 INFO L85 PathProgramCache]: Analyzing trace with hash -53615191, now seen corresponding path program 5 times [2024-10-11 01:48:41,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:41,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953330274] [2024-10-11 01:48:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:41,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:42,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:42,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953330274] [2024-10-11 01:48:42,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953330274] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:42,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090367905] [2024-10-11 01:48:42,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 01:48:42,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:42,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:42,952 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:42,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 01:48:51,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-10-11 01:48:51,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:48:51,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-11 01:48:51,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:48:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:51,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:48:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:54,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090367905] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:48:54,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:48:54,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2024-10-11 01:48:54,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129609771] [2024-10-11 01:48:54,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:48:54,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-10-11 01:48:54,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:48:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-10-11 01:48:54,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-10-11 01:48:54,364 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 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) [2024-10-11 01:48:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:48:54,504 INFO L93 Difference]: Finished difference Result 104 states and 151 transitions. [2024-10-11 01:48:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-10-11 01:48:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 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 51 [2024-10-11 01:48:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:48:54,506 INFO L225 Difference]: With dead ends: 104 [2024-10-11 01:48:54,506 INFO L226 Difference]: Without dead ends: 100 [2024-10-11 01:48:54,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-10-11 01:48:54,511 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:48:54,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:48:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-11 01:48:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-10-11 01:48:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 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) [2024-10-11 01:48:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2024-10-11 01:48:54,530 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 51 [2024-10-11 01:48:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:48:54,530 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2024-10-11 01:48:54,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 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) [2024-10-11 01:48:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2024-10-11 01:48:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-10-11 01:48:54,534 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:48:54,534 INFO L215 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2024-10-11 01:48:54,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 01:48:54,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:54,736 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:48:54,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:48:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash -153161303, now seen corresponding path program 6 times [2024-10-11 01:48:54,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:48:54,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286908163] [2024-10-11 01:48:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:48:54,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:48:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:48:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:48:59,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:48:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286908163] [2024-10-11 01:48:59,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286908163] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:48:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591178697] [2024-10-11 01:48:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 01:48:59,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:48:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:48:59,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:48:59,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process