./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ms5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/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 ../sv-benchmarks/c/array-fpi/ms5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --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 5d49931b392f3e5db08af1630b313adf7396c4587f1a053ae0de1991b384d39a --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:26:23,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:26:23,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:26:23,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:26:23,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:26:23,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:26:23,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:26:23,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:26:23,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:26:23,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:26:23,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:26:23,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:26:23,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:26:23,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:26:23,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:26:23,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:26:23,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:26:23,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:26:23,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:26:23,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:26:23,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:26:23,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:26:23,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:26:23,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:26:23,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:26:23,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:26:23,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:26:23,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:26:23,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:26:23,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:26:23,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:26:23,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:26:23,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:26:23,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:26:23,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:26:23,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:26:23,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:26:23,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:26:23,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:26:23,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:26:23,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:26:23,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:26:24,004 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:26:24,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:26:24,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:26:24,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:26:24,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:26:24,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:26:24,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:26:24,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:26:24,006 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:26:24,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:26:24,006 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:26:24,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:26:24,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:26:24,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:26:24,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:26:24,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:26:24,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:26:24,007 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:26:24,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:26:24,007 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:26:24,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:26:24,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:26:24,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:26:24,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:26:24,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:26:24,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:26:24,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:26:24,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:26:24,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:26:24,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:26:24,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:26:24,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:26:24,009 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:26:24,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:26:24,010 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:26:24,010 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d49931b392f3e5db08af1630b313adf7396c4587f1a053ae0de1991b384d39a [2023-02-16 00:26:24,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:26:24,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:26:24,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:26:24,195 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:26:24,196 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:26:24,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms5.c [2023-02-16 00:26:25,079 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:26:25,239 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:26:25,240 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms5.c [2023-02-16 00:26:25,243 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/202062891/abeb971da9d847a0b72f859d121640c8/FLAGd69f1418b [2023-02-16 00:26:25,252 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/202062891/abeb971da9d847a0b72f859d121640c8 [2023-02-16 00:26:25,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:26:25,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:26:25,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:26:25,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:26:25,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:26:25,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3e6d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25, skipping insertion in model container [2023-02-16 00:26:25,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:26:25,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:26:25,360 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms5.c[586,599] [2023-02-16 00:26:25,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:26:25,375 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:26:25,382 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms5.c[586,599] [2023-02-16 00:26:25,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:26:25,395 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:26:25,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25 WrapperNode [2023-02-16 00:26:25,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:26:25,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:26:25,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:26:25,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:26:25,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,416 INFO L138 Inliner]: procedures = 17, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-02-16 00:26:25,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:26:25,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:26:25,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:26:25,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:26:25,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,430 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:26:25,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:26:25,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:26:25,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:26:25,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (1/1) ... [2023-02-16 00:26:25,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:26:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:26:25,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 00:26:25,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 00:26:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:26:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:26:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 00:26:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 00:26:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 00:26:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:26:25,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:26:25,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 00:26:25,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 00:26:25,523 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:26:25,526 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:26:25,618 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:26:25,622 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:26:25,622 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 00:26:25,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:26:25 BoogieIcfgContainer [2023-02-16 00:26:25,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:26:25,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:26:25,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:26:25,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:26:25,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:26:25" (1/3) ... [2023-02-16 00:26:25,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc3e4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:26:25, skipping insertion in model container [2023-02-16 00:26:25,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:26:25" (2/3) ... [2023-02-16 00:26:25,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc3e4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:26:25, skipping insertion in model container [2023-02-16 00:26:25,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:26:25" (3/3) ... [2023-02-16 00:26:25,653 INFO L112 eAbstractionObserver]: Analyzing ICFG ms5.c [2023-02-16 00:26:25,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:26:25,664 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:26:25,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:26:25,717 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7908b1f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:26:25,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:26:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 00:26:25,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:26:25,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:26:25,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:26:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:26:25,729 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2023-02-16 00:26:25,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:26:25,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604751192] [2023-02-16 00:26:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:26:25,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:26:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:26:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:25,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:26:25,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604751192] [2023-02-16 00:26:25,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604751192] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:26:25,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:26:25,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:26:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374006651] [2023-02-16 00:26:25,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:26:25,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:26:25,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:26:25,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:26:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:26:25,859 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:26:25,876 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-02-16 00:26:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:26:25,878 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 00:26:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:26:25,883 INFO L225 Difference]: With dead ends: 34 [2023-02-16 00:26:25,883 INFO L226 Difference]: Without dead ends: 15 [2023-02-16 00:26:25,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:26:25,889 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:26:25,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:26:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-16 00:26:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-16 00:26:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-16 00:26:25,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2023-02-16 00:26:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:26:25,911 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-16 00:26:25,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-16 00:26:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 00:26:25,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:26:25,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:26:25,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 00:26:25,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:26:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:26:25,913 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2023-02-16 00:26:25,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:26:25,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507701070] [2023-02-16 00:26:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:26:25,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:26:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:26:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:26,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:26:26,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507701070] [2023-02-16 00:26:26,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507701070] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:26:26,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:26:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:26:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936032913] [2023-02-16 00:26:26,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:26:26,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:26:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:26:26,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:26:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:26:26,055 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:26:26,093 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-02-16 00:26:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:26:26,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 00:26:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:26:26,095 INFO L225 Difference]: With dead ends: 28 [2023-02-16 00:26:26,095 INFO L226 Difference]: Without dead ends: 20 [2023-02-16 00:26:26,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:26:26,097 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:26:26,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:26:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-16 00:26:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-02-16 00:26:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-02-16 00:26:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-02-16 00:26:26,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2023-02-16 00:26:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:26:26,101 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-02-16 00:26:26,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-02-16 00:26:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 00:26:26,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:26:26,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:26:26,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 00:26:26,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:26:26,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:26:26,103 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2023-02-16 00:26:26,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:26:26,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125913622] [2023-02-16 00:26:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:26:26,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:26:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:26:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 00:26:26,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:26:26,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125913622] [2023-02-16 00:26:26,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125913622] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:26:26,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:26:26,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 00:26:26,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892671690] [2023-02-16 00:26:26,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:26:26,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 00:26:26,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:26:26,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 00:26:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:26:26,382 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2023-02-16 00:26:26,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:26:26,426 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-02-16 00:26:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 00:26:26,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 16 [2023-02-16 00:26:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:26:26,429 INFO L225 Difference]: With dead ends: 25 [2023-02-16 00:26:26,430 INFO L226 Difference]: Without dead ends: 21 [2023-02-16 00:26:26,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:26:26,432 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:26:26,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:26:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-16 00:26:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-02-16 00:26:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-02-16 00:26:26,440 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2023-02-16 00:26:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:26:26,441 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-02-16 00:26:26,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2023-02-16 00:26:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-02-16 00:26:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 00:26:26,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:26:26,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:26:26,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 00:26:26,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:26:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:26:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash -422196611, now seen corresponding path program 1 times [2023-02-16 00:26:26,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:26:26,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383689441] [2023-02-16 00:26:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:26:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:26:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:26:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:26,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:26:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383689441] [2023-02-16 00:26:26,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383689441] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:26:26,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898557625] [2023-02-16 00:26:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:26:26,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:26:26,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:26:26,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:26:26,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:26:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:26:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 00:26:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:26:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:26,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:26:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:26,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898557625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:26:26,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:26:26,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-16 00:26:26,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944991411] [2023-02-16 00:26:26,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:26:26,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 00:26:26,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:26:26,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 00:26:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-16 00:26:26,731 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2023-02-16 00:26:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:26:26,802 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-16 00:26:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:26:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 19 [2023-02-16 00:26:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:26:26,803 INFO L225 Difference]: With dead ends: 39 [2023-02-16 00:26:26,803 INFO L226 Difference]: Without dead ends: 25 [2023-02-16 00:26:26,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-16 00:26:26,808 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:26:26,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:26:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-16 00:26:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-02-16 00:26:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-16 00:26:26,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2023-02-16 00:26:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:26:26,817 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-16 00:26:26,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2023-02-16 00:26:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-16 00:26:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-16 00:26:26,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:26:26,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:26:26,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 00:26:27,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:26:27,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:26:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:26:27,024 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 2 times [2023-02-16 00:26:27,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:26:27,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136529677] [2023-02-16 00:26:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:26:27,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:26:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:26:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:27,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:26:27,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136529677] [2023-02-16 00:26:27,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136529677] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:26:27,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947844529] [2023-02-16 00:26:27,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:26:27,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:26:27,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:26:27,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:26:27,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 00:26:27,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:26:27,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:26:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 00:26:27,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:26:27,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 00:26:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:26:27,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 00:26:27,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:26:27,942 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-16 00:26:27,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2023-02-16 00:26:32,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:26:32,173 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-16 00:26:32,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 13 [2023-02-16 00:26:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:32,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:26:32,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-02-16 00:26:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:33,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947844529] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:26:33,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:26:33,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 33 [2023-02-16 00:26:33,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556934783] [2023-02-16 00:26:33,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:26:33,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 00:26:33,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:26:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 00:26:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=899, Unknown=2, NotChecked=0, Total=1056 [2023-02-16 00:26:33,024 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:35,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 00:26:37,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 00:26:39,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 00:26:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:26:39,959 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-02-16 00:26:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 00:26:39,959 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-16 00:26:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:26:39,960 INFO L225 Difference]: With dead ends: 38 [2023-02-16 00:26:39,961 INFO L226 Difference]: Without dead ends: 27 [2023-02-16 00:26:39,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=372, Invalid=1696, Unknown=2, NotChecked=0, Total=2070 [2023-02-16 00:26:39,962 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 37 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-16 00:26:39,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 40 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 329 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2023-02-16 00:26:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-16 00:26:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-16 00:26:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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) [2023-02-16 00:26:39,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-02-16 00:26:39,971 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2023-02-16 00:26:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:26:39,971 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-02-16 00:26:39,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-02-16 00:26:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 00:26:39,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:26:39,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:26:39,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 00:26:40,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:26:40,176 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:26:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:26:40,177 INFO L85 PathProgramCache]: Analyzing trace with hash -301520475, now seen corresponding path program 3 times [2023-02-16 00:26:40,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:26:40,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690899700] [2023-02-16 00:26:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:26:40,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:26:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:26:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:40,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:26:40,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690899700] [2023-02-16 00:26:40,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690899700] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:26:40,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011186260] [2023-02-16 00:26:40,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 00:26:40,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:26:40,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:26:40,264 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) [2023-02-16 00:26:40,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 00:26:40,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 00:26:40,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:26:40,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 00:26:40,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:26:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:40,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:26:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:40,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011186260] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:26:40,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:26:40,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-16 00:26:40,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318280523] [2023-02-16 00:26:40,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:26:40,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 00:26:40,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:26:40,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 00:26:40,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-16 00:26:40,430 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:26:40,510 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-02-16 00:26:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 00:26:40,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-16 00:26:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:26:40,511 INFO L225 Difference]: With dead ends: 50 [2023-02-16 00:26:40,511 INFO L226 Difference]: Without dead ends: 30 [2023-02-16 00:26:40,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-16 00:26:40,512 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:26:40,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 36 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:26:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-16 00:26:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-02-16 00:26:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-16 00:26:40,516 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2023-02-16 00:26:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:26:40,516 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-16 00:26:40,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:26:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-16 00:26:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 00:26:40,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:26:40,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:26:40,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 00:26:40,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:26:40,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:26:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:26:40,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1384678109, now seen corresponding path program 4 times [2023-02-16 00:26:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:26:40,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876428959] [2023-02-16 00:26:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:26:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:26:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:26:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:26:41,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:26:41,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876428959] [2023-02-16 00:26:41,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876428959] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:26:41,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478608985] [2023-02-16 00:26:41,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 00:26:41,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:26:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:26:41,594 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) [2023-02-16 00:26:41,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 00:26:41,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 00:26:41,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:26:41,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 00:26:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:26:41,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-16 00:26:41,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 54 [2023-02-16 00:26:50,689 INFO L321 Elim1Store]: treesize reduction 369, result has 69.1 percent of original size [2023-02-16 00:26:50,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 366 treesize of output 1072