./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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/loops/n.c24.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 01:57:08,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 01:57:09,031 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 01:57:09,035 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 01:57:09,036 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 01:57:09,053 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 01:57:09,054 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 01:57:09,054 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 01:57:09,055 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 01:57:09,057 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 01:57:09,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 01:57:09,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 01:57:09,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 01:57:09,059 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 01:57:09,059 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 01:57:09,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 01:57:09,059 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 01:57:09,059 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 01:57:09,059 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 01:57:09,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 01:57:09,060 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 01:57:09,061 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 01:57:09,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 01:57:09,062 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 01:57:09,062 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 01:57:09,062 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 01:57:09,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 01:57:09,062 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 01:57:09,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 01:57:09,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 01:57:09,063 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 01:57:09,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 01:57:09,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:57:09,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 01:57:09,064 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 01:57:09,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 01:57:09,065 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 01:57:09,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 01:57:09,065 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 01:57:09,065 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 01:57:09,066 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 01:57:09,066 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 01:57:09,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2024-10-14 01:57:09,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 01:57:09,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 01:57:09,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 01:57:09,282 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 01:57:09,282 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 01:57:09,283 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i [2024-10-14 01:57:10,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 01:57:10,638 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 01:57:10,639 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i [2024-10-14 01:57:10,650 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f4247961/bf574827fa664e62a73417ffe2300360/FLAGe251d2aa2 [2024-10-14 01:57:11,027 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f4247961/bf574827fa664e62a73417ffe2300360 [2024-10-14 01:57:11,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 01:57:11,030 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 01:57:11,031 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 01:57:11,032 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 01:57:11,035 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 01:57:11,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2afad288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11, skipping insertion in model container [2024-10-14 01:57:11,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,059 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 01:57:11,175 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/loops/n.c24.i[805,818] [2024-10-14 01:57:11,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:57:11,220 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 01:57:11,232 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/loops/n.c24.i[805,818] [2024-10-14 01:57:11,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:57:11,270 INFO L204 MainTranslator]: Completed translation [2024-10-14 01:57:11,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11 WrapperNode [2024-10-14 01:57:11,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 01:57:11,272 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 01:57:11,272 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 01:57:11,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 01:57:11,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,290 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,313 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 159 [2024-10-14 01:57:11,316 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 01:57:11,317 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 01:57:11,317 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 01:57:11,317 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 01:57:11,326 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,328 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,339 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 9, 2]. 43 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 5, 1]. [2024-10-14 01:57:11,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,344 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,347 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,348 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 01:57:11,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 01:57:11,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 01:57:11,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 01:57:11,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (1/1) ... [2024-10-14 01:57:11,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:57:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:57:11,375 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) [2024-10-14 01:57:11,377 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 [2024-10-14 01:57:11,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 01:57:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-10-14 01:57:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-10-14 01:57:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-10-14 01:57:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-10-14 01:57:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 01:57:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 01:57:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 01:57:11,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 01:57:11,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 01:57:11,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 01:57:11,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 01:57:11,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 01:57:11,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 01:57:11,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 01:57:11,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 01:57:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 01:57:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 01:57:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 01:57:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#0 [2024-10-14 01:57:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#1 [2024-10-14 01:57:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#2 [2024-10-14 01:57:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#3 [2024-10-14 01:57:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 01:57:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 01:57:11,512 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 01:57:11,526 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 01:57:11,676 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2024-10-14 01:57:11,677 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 01:57:11,706 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 01:57:11,706 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 01:57:11,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:57:11 BoogieIcfgContainer [2024-10-14 01:57:11,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 01:57:11,708 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 01:57:11,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 01:57:11,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 01:57:11,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 01:57:11" (1/3) ... [2024-10-14 01:57:11,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa5c0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:57:11, skipping insertion in model container [2024-10-14 01:57:11,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:57:11" (2/3) ... [2024-10-14 01:57:11,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa5c0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:57:11, skipping insertion in model container [2024-10-14 01:57:11,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:57:11" (3/3) ... [2024-10-14 01:57:11,713 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2024-10-14 01:57:11,725 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 01:57:11,725 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 01:57:11,775 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 01:57:11,783 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;@521abcb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 01:57:11,783 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 01:57:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 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) [2024-10-14 01:57:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-14 01:57:11,791 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:57:11,792 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:57:11,792 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:57:11,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:57:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash -230994160, now seen corresponding path program 1 times [2024-10-14 01:57:11,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:57:11,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107275566] [2024-10-14 01:57:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:11,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:57:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 01:57:11,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:57:11,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107275566] [2024-10-14 01:57:11,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107275566] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:57:11,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:57:11,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 01:57:11,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132664988] [2024-10-14 01:57:11,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:57:11,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 01:57:11,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:57:12,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 01:57:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 01:57:12,015 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 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 2.3333333333333335) internal successors, (7), 2 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) [2024-10-14 01:57:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:57:12,062 INFO L93 Difference]: Finished difference Result 74 states and 126 transitions. [2024-10-14 01:57:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 01:57:12,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) Word has length 7 [2024-10-14 01:57:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:57:12,072 INFO L225 Difference]: With dead ends: 74 [2024-10-14 01:57:12,072 INFO L226 Difference]: Without dead ends: 44 [2024-10-14 01:57:12,081 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 [2024-10-14 01:57:12,083 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:57:12,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:57:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-14 01:57:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2024-10-14 01:57:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 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) [2024-10-14 01:57:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-10-14 01:57:12,140 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2024-10-14 01:57:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:57:12,140 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-10-14 01:57:12,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2024-10-14 01:57:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-10-14 01:57:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 01:57:12,145 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:57:12,145 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:57:12,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 01:57:12,146 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:57:12,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:57:12,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1551984996, now seen corresponding path program 1 times [2024-10-14 01:57:12,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:57:12,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484581849] [2024-10-14 01:57:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:12,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:57:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 01:57:12,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:57:12,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484581849] [2024-10-14 01:57:12,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484581849] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:57:12,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838404908] [2024-10-14 01:57:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:12,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:12,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:57:12,248 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) [2024-10-14 01:57:12,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 01:57:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:12,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 01:57:12,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:57:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 01:57:12,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:57:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 01:57:12,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838404908] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:57:12,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:57:12,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-14 01:57:12,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274441465] [2024-10-14 01:57:12,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:57:12,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 01:57:12,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:57:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 01:57:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 01:57:12,375 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2024-10-14 01:57:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:57:12,464 INFO L93 Difference]: Finished difference Result 108 states and 160 transitions. [2024-10-14 01:57:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 01:57:12,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 13 [2024-10-14 01:57:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:57:12,465 INFO L225 Difference]: With dead ends: 108 [2024-10-14 01:57:12,465 INFO L226 Difference]: Without dead ends: 84 [2024-10-14 01:57:12,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 01:57:12,466 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 156 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:57:12,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 102 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:57:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-14 01:57:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-10-14 01:57:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 83 states have internal predecessors, (121), 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) [2024-10-14 01:57:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2024-10-14 01:57:12,481 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 13 [2024-10-14 01:57:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:57:12,481 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2024-10-14 01:57:12,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2024-10-14 01:57:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2024-10-14 01:57:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 01:57:12,482 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:57:12,482 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:57:12,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 01:57:12,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:12,683 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:57:12,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:57:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash -370254069, now seen corresponding path program 2 times [2024-10-14 01:57:12,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:57:12,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015363560] [2024-10-14 01:57:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:12,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:57:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-14 01:57:12,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:57:12,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015363560] [2024-10-14 01:57:12,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015363560] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:57:12,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:57:12,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 01:57:12,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250171541] [2024-10-14 01:57:12,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:57:12,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 01:57:12,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:57:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 01:57:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 01:57:12,889 INFO L87 Difference]: Start difference. First operand 84 states and 121 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2024-10-14 01:57:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:57:12,926 INFO L93 Difference]: Finished difference Result 158 states and 231 transitions. [2024-10-14 01:57:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 01:57:12,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) Word has length 31 [2024-10-14 01:57:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:57:12,929 INFO L225 Difference]: With dead ends: 158 [2024-10-14 01:57:12,929 INFO L226 Difference]: Without dead ends: 154 [2024-10-14 01:57:12,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 01:57:12,930 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 23 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:57:12,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 85 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:57:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-10-14 01:57:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 85. [2024-10-14 01:57:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 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) [2024-10-14 01:57:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 123 transitions. [2024-10-14 01:57:12,946 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 123 transitions. Word has length 31 [2024-10-14 01:57:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:57:12,946 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 123 transitions. [2024-10-14 01:57:12,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2024-10-14 01:57:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 123 transitions. [2024-10-14 01:57:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 01:57:12,947 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:57:12,948 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:57:12,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 01:57:12,948 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:57:12,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:57:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1016351884, now seen corresponding path program 1 times [2024-10-14 01:57:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:57:12,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354861337] [2024-10-14 01:57:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:12,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:57:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-14 01:57:13,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:57:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354861337] [2024-10-14 01:57:13,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354861337] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:57:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302471476] [2024-10-14 01:57:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:13,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:13,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:57:13,080 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) [2024-10-14 01:57:13,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 01:57:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:13,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 01:57:13,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:57:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-14 01:57:13,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:57:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-14 01:57:13,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302471476] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:57:13,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:57:13,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-14 01:57:13,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925309805] [2024-10-14 01:57:13,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:57:13,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 01:57:13,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:57:13,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 01:57:13,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-14 01:57:13,241 INFO L87 Difference]: Start difference. First operand 85 states and 123 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2024-10-14 01:57:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:57:13,400 INFO L93 Difference]: Finished difference Result 298 states and 445 transitions. [2024-10-14 01:57:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 01:57:13,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) Word has length 35 [2024-10-14 01:57:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:57:13,402 INFO L225 Difference]: With dead ends: 298 [2024-10-14 01:57:13,402 INFO L226 Difference]: Without dead ends: 219 [2024-10-14 01:57:13,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-14 01:57:13,403 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 702 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:57:13,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 210 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:57:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-10-14 01:57:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 199. [2024-10-14 01:57:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.4696969696969697) internal successors, (291), 198 states have internal predecessors, (291), 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) [2024-10-14 01:57:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 291 transitions. [2024-10-14 01:57:13,427 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 291 transitions. Word has length 35 [2024-10-14 01:57:13,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:57:13,427 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 291 transitions. [2024-10-14 01:57:13,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2024-10-14 01:57:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 291 transitions. [2024-10-14 01:57:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-14 01:57:13,430 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:57:13,430 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:57:13,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 01:57:13,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-14 01:57:13,630 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:57:13,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:57:13,631 INFO L85 PathProgramCache]: Analyzing trace with hash -838044372, now seen corresponding path program 2 times [2024-10-14 01:57:13,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:57:13,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15269880] [2024-10-14 01:57:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:13,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:57:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2024-10-14 01:57:13,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:57:13,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15269880] [2024-10-14 01:57:13,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15269880] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:57:13,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110789042] [2024-10-14 01:57:13,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 01:57:13,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:13,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:57:13,907 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) [2024-10-14 01:57:13,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 01:57:14,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 01:57:14,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:57:14,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 01:57:14,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:57:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2024-10-14 01:57:14,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:57:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2024-10-14 01:57:14,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110789042] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:57:14,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:57:14,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-14 01:57:14,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828784722] [2024-10-14 01:57:14,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:57:14,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-14 01:57:14,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:57:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-14 01:57:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-14 01:57:14,238 INFO L87 Difference]: Start difference. First operand 199 states and 291 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2024-10-14 01:57:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:57:14,560 INFO L93 Difference]: Finished difference Result 652 states and 979 transitions. [2024-10-14 01:57:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 01:57:14,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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 71 [2024-10-14 01:57:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:57:14,562 INFO L225 Difference]: With dead ends: 652 [2024-10-14 01:57:14,562 INFO L226 Difference]: Without dead ends: 465 [2024-10-14 01:57:14,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-14 01:57:14,565 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1690 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 01:57:14,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 429 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 01:57:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-10-14 01:57:14,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 427. [2024-10-14 01:57:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.471830985915493) internal successors, (627), 426 states have internal predecessors, (627), 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) [2024-10-14 01:57:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 627 transitions. [2024-10-14 01:57:14,596 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 627 transitions. Word has length 71 [2024-10-14 01:57:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:57:14,596 INFO L471 AbstractCegarLoop]: Abstraction has 427 states and 627 transitions. [2024-10-14 01:57:14,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2024-10-14 01:57:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 627 transitions. [2024-10-14 01:57:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-14 01:57:14,604 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:57:14,604 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:57:14,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 01:57:14,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:14,805 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:57:14,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:57:14,805 INFO L85 PathProgramCache]: Analyzing trace with hash 254447212, now seen corresponding path program 3 times [2024-10-14 01:57:14,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:57:14,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200520647] [2024-10-14 01:57:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:14,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:57:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2024-10-14 01:57:15,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:57:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200520647] [2024-10-14 01:57:15,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200520647] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:57:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842483196] [2024-10-14 01:57:15,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 01:57:15,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:15,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:57:15,513 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) [2024-10-14 01:57:15,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 01:57:15,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 01:57:15,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:57:15,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 01:57:15,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:57:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2024-10-14 01:57:15,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:57:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2024-10-14 01:57:15,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842483196] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:57:15,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:57:15,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 33 [2024-10-14 01:57:15,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432306217] [2024-10-14 01:57:15,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:57:15,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 01:57:15,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:57:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 01:57:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 01:57:15,859 INFO L87 Difference]: Start difference. First operand 427 states and 627 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 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) [2024-10-14 01:57:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:57:19,815 INFO L93 Difference]: Finished difference Result 2091 states and 3185 transitions. [2024-10-14 01:57:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2024-10-14 01:57:19,818 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 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 143 [2024-10-14 01:57:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:57:19,823 INFO L225 Difference]: With dead ends: 2091 [2024-10-14 01:57:19,824 INFO L226 Difference]: Without dead ends: 1685 [2024-10-14 01:57:19,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11992 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8261, Invalid=21841, Unknown=0, NotChecked=0, Total=30102 [2024-10-14 01:57:19,833 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 11845 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11845 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 01:57:19,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11845 Valid, 536 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 01:57:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2024-10-14 01:57:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 488. [2024-10-14 01:57:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.486652977412731) internal successors, (724), 487 states have internal predecessors, (724), 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) [2024-10-14 01:57:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 724 transitions. [2024-10-14 01:57:19,864 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 724 transitions. Word has length 143 [2024-10-14 01:57:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:57:19,864 INFO L471 AbstractCegarLoop]: Abstraction has 488 states and 724 transitions. [2024-10-14 01:57:19,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 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) [2024-10-14 01:57:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 724 transitions. [2024-10-14 01:57:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-10-14 01:57:19,867 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:57:19,867 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:57:19,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 01:57:20,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:20,067 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:57:20,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:57:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2047865216, now seen corresponding path program 4 times [2024-10-14 01:57:20,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:57:20,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245029977] [2024-10-14 01:57:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:20,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:57:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2024-10-14 01:57:20,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:57:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245029977] [2024-10-14 01:57:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245029977] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:57:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553972699] [2024-10-14 01:57:20,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 01:57:20,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:57:20,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:57:20,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 01:57:20,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 01:57:20,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:57:20,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 01:57:20,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:57:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2024-10-14 01:57:20,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:57:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2024-10-14 01:57:21,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553972699] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:57:21,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:57:21,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 51 [2024-10-14 01:57:21,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96758855] [2024-10-14 01:57:21,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:57:21,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-14 01:57:21,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:57:21,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-14 01:57:21,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-10-14 01:57:21,525 INFO L87 Difference]: Start difference. First operand 488 states and 724 transitions. Second operand has 51 states, 51 states have (on average 5.568627450980392) internal successors, (284), 51 states have internal predecessors, (284), 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) [2024-10-14 01:57:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:57:22,498 INFO L93 Difference]: Finished difference Result 2553 states and 3999 transitions. [2024-10-14 01:57:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-14 01:57:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.568627450980392) internal successors, (284), 51 states have internal predecessors, (284), 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 161 [2024-10-14 01:57:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:57:22,505 INFO L225 Difference]: With dead ends: 2553 [2024-10-14 01:57:22,505 INFO L226 Difference]: Without dead ends: 2090 [2024-10-14 01:57:22,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-10-14 01:57:22,507 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 4166 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4166 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 01:57:22,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4166 Valid, 882 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 01:57:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2024-10-14 01:57:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 963. [2024-10-14 01:57:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.4802494802494803) internal successors, (1424), 962 states have internal predecessors, (1424), 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) [2024-10-14 01:57:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1424 transitions. [2024-10-14 01:57:22,564 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1424 transitions. Word has length 161 [2024-10-14 01:57:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:57:22,564 INFO L471 AbstractCegarLoop]: Abstraction has 963 states and 1424 transitions. [2024-10-14 01:57:22,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.568627450980392) internal successors, (284), 51 states have internal predecessors, (284), 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) [2024-10-14 01:57:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1424 transitions. [2024-10-14 01:57:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2024-10-14 01:57:22,567 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:57:22,567 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:57:22,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 01:57:22,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:22,768 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:57:22,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:57:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash -348907185, now seen corresponding path program 5 times [2024-10-14 01:57:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:57:22,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854846943] [2024-10-14 01:57:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:57:22,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:57:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:57:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2024-10-14 01:57:24,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:57:24,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854846943] [2024-10-14 01:57:24,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854846943] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:57:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902621864] [2024-10-14 01:57:24,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 01:57:24,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:57:24,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:57:24,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:57:24,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 01:58:19,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2024-10-14 01:58:19,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:58:19,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-14 01:58:19,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:58:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2024-10-14 01:58:19,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:58:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2024-10-14 01:58:21,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902621864] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:58:21,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:58:21,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2024-10-14 01:58:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389368793] [2024-10-14 01:58:21,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:58:21,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-10-14 01:58:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:58:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-10-14 01:58:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2024-10-14 01:58:21,516 INFO L87 Difference]: Start difference. First operand 963 states and 1424 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 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) [2024-10-14 01:58:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:58:27,984 INFO L93 Difference]: Finished difference Result 5078 states and 7949 transitions. [2024-10-14 01:58:27,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-10-14 01:58:27,984 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 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 311 [2024-10-14 01:58:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:58:27,995 INFO L225 Difference]: With dead ends: 5078 [2024-10-14 01:58:27,995 INFO L226 Difference]: Without dead ends: 4165 [2024-10-14 01:58:27,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2024-10-14 01:58:27,998 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 10348 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10348 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-14 01:58:27,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10348 Valid, 1797 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-14 01:58:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2024-10-14 01:58:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 1913. [2024-10-14 01:58:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 1.4769874476987448) internal successors, (2824), 1912 states have internal predecessors, (2824), 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) [2024-10-14 01:58:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2824 transitions. [2024-10-14 01:58:28,091 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2824 transitions. Word has length 311 [2024-10-14 01:58:28,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:58:28,091 INFO L471 AbstractCegarLoop]: Abstraction has 1913 states and 2824 transitions. [2024-10-14 01:58:28,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 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) [2024-10-14 01:58:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2824 transitions. [2024-10-14 01:58:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2024-10-14 01:58:28,100 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:58:28,101 INFO L215 NwaCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:58:28,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 01:58:28,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:58:28,301 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:58:28,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:58:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1932069167, now seen corresponding path program 6 times [2024-10-14 01:58:28,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:58:28,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943846289] [2024-10-14 01:58:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:58:28,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:58:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:58:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 29130 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 24279 trivial. 0 not checked. [2024-10-14 01:58:35,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:58:35,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943846289] [2024-10-14 01:58:35,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943846289] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:58:35,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444980084] [2024-10-14 01:58:35,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 01:58:35,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:58:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:58:35,405 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:58:35,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 01:58:35,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-10-14 01:58:35,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:58:35,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 01:58:35,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:58:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 29130 backedges. 680 proven. 28 refuted. 0 times theorem prover too weak. 28422 trivial. 0 not checked. [2024-10-14 01:58:35,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:58:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 29130 backedges. 680 proven. 28 refuted. 0 times theorem prover too weak. 28422 trivial. 0 not checked. [2024-10-14 01:58:36,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444980084] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:58:36,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:58:36,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 9, 9] total 115 [2024-10-14 01:58:36,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008126023] [2024-10-14 01:58:36,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:58:36,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-10-14 01:58:36,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:58:36,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-10-14 01:58:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5127, Invalid=7983, Unknown=0, NotChecked=0, Total=13110 [2024-10-14 01:58:36,355 INFO L87 Difference]: Start difference. First operand 1913 states and 2824 transitions. Second operand has 115 states, 115 states have (on average 1.4521739130434783) internal successors, (167), 115 states have internal predecessors, (167), 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)