./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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-cav19/array_init_var_plus_ind.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 c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 20:40:10,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 20:40:10,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 20:40:10,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 20:40:10,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 20:40:10,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 20:40:10,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 20:40:10,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 20:40:10,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 20:40:10,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 20:40:10,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 20:40:10,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 20:40:10,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 20:40:10,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 20:40:10,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 20:40:10,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 20:40:10,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 20:40:10,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 20:40:10,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 20:40:10,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 20:40:10,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 20:40:10,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 20:40:10,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 20:40:10,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 20:40:10,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 20:40:10,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 20:40:10,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 20:40:10,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 20:40:10,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 20:40:10,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 20:40:10,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 20:40:10,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 20:40:10,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 20:40:10,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 20:40:10,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 20:40:10,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 20:40:10,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 20:40:10,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 20:40:10,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 20:40:10,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 20:40:10,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 20:40:10,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 20:40:10,499 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 20:40:10,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 20:40:10,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 20:40:10,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 20:40:10,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 20:40:10,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 20:40:10,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 20:40:10,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 20:40:10,507 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 20:40:10,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 20:40:10,507 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 20:40:10,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 20:40:10,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 20:40:10,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 20:40:10,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 20:40:10,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 20:40:10,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 20:40:10,508 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 20:40:10,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 20:40:10,509 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 20:40:10,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 20:40:10,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 20:40:10,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 20:40:10,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 20:40:10,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 20:40:10,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 20:40:10,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 20:40:10,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 20:40:10,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 20:40:10,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 20:40:10,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 20:40:10,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 20:40:10,510 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 20:40:10,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 20:40:10,515 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 20:40:10,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 [2023-02-17 20:40:10,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 20:40:10,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 20:40:10,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 20:40:10,704 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 20:40:10,704 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 20:40:10,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2023-02-17 20:40:11,690 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 20:40:11,822 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 20:40:11,822 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2023-02-17 20:40:11,826 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b74acae1/894bf7e075504dd18843e16c4519eaa4/FLAG5af3c4aff [2023-02-17 20:40:11,834 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b74acae1/894bf7e075504dd18843e16c4519eaa4 [2023-02-17 20:40:11,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 20:40:11,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 20:40:11,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 20:40:11,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 20:40:11,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 20:40:11,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2777864f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11, skipping insertion in model container [2023-02-17 20:40:11,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 20:40:11,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 20:40:11,931 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-cav19/array_init_var_plus_ind.c[414,427] [2023-02-17 20:40:11,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 20:40:11,945 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 20:40:11,952 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-cav19/array_init_var_plus_ind.c[414,427] [2023-02-17 20:40:11,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 20:40:11,963 INFO L208 MainTranslator]: Completed translation [2023-02-17 20:40:11,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11 WrapperNode [2023-02-17 20:40:11,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 20:40:11,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 20:40:11,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 20:40:11,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 20:40:11,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,985 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2023-02-17 20:40:11,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 20:40:11,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 20:40:11,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 20:40:11,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 20:40:11,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,997 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:11,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 20:40:11,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 20:40:11,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 20:40:11,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 20:40:12,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (1/1) ... [2023-02-17 20:40:12,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 20:40:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:40:12,021 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) [2023-02-17 20:40:12,027 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 [2023-02-17 20:40:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 20:40:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 20:40:12,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 20:40:12,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 20:40:12,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 20:40:12,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 20:40:12,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 20:40:12,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 20:40:12,091 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 20:40:12,092 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 20:40:12,170 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 20:40:12,174 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 20:40:12,174 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 20:40:12,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:40:12 BoogieIcfgContainer [2023-02-17 20:40:12,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 20:40:12,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 20:40:12,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 20:40:12,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 20:40:12,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:40:11" (1/3) ... [2023-02-17 20:40:12,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdd8651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:40:12, skipping insertion in model container [2023-02-17 20:40:12,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:40:11" (2/3) ... [2023-02-17 20:40:12,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdd8651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:40:12, skipping insertion in model container [2023-02-17 20:40:12,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:40:12" (3/3) ... [2023-02-17 20:40:12,180 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2023-02-17 20:40:12,191 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 20:40:12,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 20:40:12,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 20:40:12,223 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;@7a99a957, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 20:40:12,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 20:40:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:40:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 20:40:12,230 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:12,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:12,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2023-02-17 20:40:12,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:12,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833518971] [2023-02-17 20:40:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:12,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:12,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:12,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833518971] [2023-02-17 20:40:12,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833518971] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 20:40:12,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 20:40:12,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 20:40:12,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024244596] [2023-02-17 20:40:12,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 20:40:12,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 20:40:12,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:12,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 20:40:12,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 20:40:12,374 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) 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) [2023-02-17 20:40:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:12,389 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2023-02-17 20:40:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 20:40:12,391 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) 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 [2023-02-17 20:40:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:12,395 INFO L225 Difference]: With dead ends: 27 [2023-02-17 20:40:12,395 INFO L226 Difference]: Without dead ends: 12 [2023-02-17 20:40:12,397 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 [2023-02-17 20:40:12,401 INFO L413 NwaCegarLoop]: 18 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, 18 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 [2023-02-17 20:40:12,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 20:40:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-17 20:40:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-17 20:40:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:40:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-17 20:40:12,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2023-02-17 20:40:12,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:12,419 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-17 20:40:12,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) 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) [2023-02-17 20:40:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-17 20:40:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 20:40:12,419 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:12,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 20:40:12,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2023-02-17 20:40:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:12,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771585400] [2023-02-17 20:40:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:12,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:12,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771585400] [2023-02-17 20:40:12,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771585400] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 20:40:12,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 20:40:12,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 20:40:12,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144493463] [2023-02-17 20:40:12,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 20:40:12,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 20:40:12,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 20:40:12,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 20:40:12,477 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2023-02-17 20:40:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:12,504 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-02-17 20:40:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 20:40:12,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2023-02-17 20:40:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:12,506 INFO L225 Difference]: With dead ends: 29 [2023-02-17 20:40:12,506 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 20:40:12,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 20:40:12,507 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 20:40:12,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 20:40:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 20:40:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2023-02-17 20:40:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:40:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-17 20:40:12,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-02-17 20:40:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:12,513 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-17 20:40:12,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2023-02-17 20:40:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-17 20:40:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 20:40:12,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:12,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:12,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 20:40:12,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:12,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:12,515 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2023-02-17 20:40:12,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:12,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293985262] [2023-02-17 20:40:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:12,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:12,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:12,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293985262] [2023-02-17 20:40:12,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293985262] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 20:40:12,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 20:40:12,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 20:40:12,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809893924] [2023-02-17 20:40:12,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 20:40:12,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 20:40:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:12,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 20:40:12,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 20:40:12,595 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:40:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:12,614 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-02-17 20:40:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 20:40:12,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 20:40:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:12,615 INFO L225 Difference]: With dead ends: 23 [2023-02-17 20:40:12,615 INFO L226 Difference]: Without dead ends: 15 [2023-02-17 20:40:12,616 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 [2023-02-17 20:40:12,617 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 20:40:12,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 20:40:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-17 20:40:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-02-17 20:40:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2023-02-17 20:40:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-02-17 20:40:12,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2023-02-17 20:40:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:12,620 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-02-17 20:40:12,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:40:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-02-17 20:40:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 20:40:12,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:12,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:12,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 20:40:12,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:12,638 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2023-02-17 20:40:12,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:12,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899477108] [2023-02-17 20:40:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:12,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:12,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:12,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899477108] [2023-02-17 20:40:12,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899477108] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:40:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008022805] [2023-02-17 20:40:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:12,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:40:12,751 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) [2023-02-17 20:40:12,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 20:40:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:12,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 20:40:12,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:40:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:12,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:40:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:12,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008022805] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:40:12,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:40:12,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-02-17 20:40:12,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107773361] [2023-02-17 20:40:12,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:40:12,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 20:40:12,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:12,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 20:40:12,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-17 20:40:12,853 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2023-02-17 20:40:12,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:12,902 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-02-17 20:40:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 20:40:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) Word has length 10 [2023-02-17 20:40:12,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:12,903 INFO L225 Difference]: With dead ends: 45 [2023-02-17 20:40:12,903 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 20:40:12,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-02-17 20:40:12,904 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 20:40:12,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 52 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 20:40:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 20:40:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2023-02-17 20:40:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2023-02-17 20:40:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-02-17 20:40:12,909 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2023-02-17 20:40:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:12,909 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-02-17 20:40:12,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2023-02-17 20:40:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-02-17 20:40:12,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 20:40:12,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:12,910 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:12,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 20:40:13,114 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 [2023-02-17 20:40:13,115 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2023-02-17 20:40:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:13,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418866317] [2023-02-17 20:40:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:13,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:13,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:13,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418866317] [2023-02-17 20:40:13,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418866317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:40:13,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37737131] [2023-02-17 20:40:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:13,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:13,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:40:13,449 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) [2023-02-17 20:40:13,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 20:40:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:13,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-17 20:40:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:40:13,568 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 17 treesize of output 13 [2023-02-17 20:40:13,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:40:13,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 10 [2023-02-17 20:40:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:13,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:40:13,664 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 16 treesize of output 14 [2023-02-17 20:40:13,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 28 [2023-02-17 20:40:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:13,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37737131] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:40:13,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:40:13,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-02-17 20:40:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378212636] [2023-02-17 20:40:13,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:40:13,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 20:40:13,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 20:40:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-02-17 20:40:13,684 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 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) [2023-02-17 20:40:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:13,783 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-02-17 20:40:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 20:40:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-17 20:40:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:13,784 INFO L225 Difference]: With dead ends: 37 [2023-02-17 20:40:13,785 INFO L226 Difference]: Without dead ends: 35 [2023-02-17 20:40:13,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-02-17 20:40:13,786 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 20:40:13,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 101 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 20:40:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-17 20:40:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2023-02-17 20:40:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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) [2023-02-17 20:40:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-17 20:40:13,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2023-02-17 20:40:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:13,790 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-17 20:40:13,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 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) [2023-02-17 20:40:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-17 20:40:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 20:40:13,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:13,791 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:13,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 20:40:13,996 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 [2023-02-17 20:40:13,996 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2023-02-17 20:40:13,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:13,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573211328] [2023-02-17 20:40:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:13,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:14,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:14,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573211328] [2023-02-17 20:40:14,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573211328] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:40:14,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030345333] [2023-02-17 20:40:14,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 20:40:14,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:14,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:40:14,226 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) [2023-02-17 20:40:14,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 20:40:14,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 20:40:14,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 20:40:14,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 20:40:14,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:40:14,306 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 [2023-02-17 20:40:14,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:40:14,349 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 29 treesize of output 28 [2023-02-17 20:40:14,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:40:14,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 10 [2023-02-17 20:40:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:14,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:40:14,499 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 25 treesize of output 23 [2023-02-17 20:40:14,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 96 treesize of output 90 [2023-02-17 20:40:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:14,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030345333] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:40:14,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:40:14,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-02-17 20:40:14,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100844478] [2023-02-17 20:40:14,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:40:14,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 20:40:14,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 20:40:14,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-02-17 20:40:14,578 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2023-02-17 20:40:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:14,721 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-02-17 20:40:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 20:40:14,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) Word has length 17 [2023-02-17 20:40:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:14,722 INFO L225 Difference]: With dead ends: 32 [2023-02-17 20:40:14,722 INFO L226 Difference]: Without dead ends: 30 [2023-02-17 20:40:14,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-02-17 20:40:14,723 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 60 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 20:40:14,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 80 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 20:40:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-17 20:40:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-02-17 20:40:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2023-02-17 20:40:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-17 20:40:14,727 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2023-02-17 20:40:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:14,727 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-17 20:40:14,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2023-02-17 20:40:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-17 20:40:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 20:40:14,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:14,728 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:14,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 20:40:14,928 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 [2023-02-17 20:40:14,928 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:14,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:14,929 INFO L85 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2023-02-17 20:40:14,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:14,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62770532] [2023-02-17 20:40:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:14,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:14,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62770532] [2023-02-17 20:40:14,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62770532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:40:14,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567921058] [2023-02-17 20:40:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:14,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:14,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:40:14,991 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) [2023-02-17 20:40:15,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 20:40:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 20:40:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:40:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:15,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:40:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:15,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567921058] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:40:15,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:40:15,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-17 20:40:15,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125480727] [2023-02-17 20:40:15,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:40:15,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 20:40:15,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:15,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 20:40:15,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-17 20:40:15,087 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2023-02-17 20:40:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:15,113 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-02-17 20:40:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 20:40:15,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 18 [2023-02-17 20:40:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:15,114 INFO L225 Difference]: With dead ends: 36 [2023-02-17 20:40:15,114 INFO L226 Difference]: Without dead ends: 24 [2023-02-17 20:40:15,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-17 20:40:15,115 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 20:40:15,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 20:40:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-17 20:40:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-17 20:40:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2023-02-17 20:40:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-02-17 20:40:15,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2023-02-17 20:40:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:15,119 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-02-17 20:40:15,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2023-02-17 20:40:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-02-17 20:40:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 20:40:15,119 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:15,120 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:15,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 20:40:15,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:15,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2023-02-17 20:40:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:15,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634959845] [2023-02-17 20:40:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:15,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:15,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:15,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634959845] [2023-02-17 20:40:15,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634959845] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:40:15,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91554937] [2023-02-17 20:40:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 20:40:15,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:40:15,493 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) [2023-02-17 20:40:15,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 20:40:15,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 20:40:15,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 20:40:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 20:40:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:40:15,563 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 [2023-02-17 20:40:15,596 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 29 treesize of output 28 [2023-02-17 20:40:15,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:40:15,686 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 20:40:15,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:40:15,687 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 3 case distinctions, treesize of input 38 treesize of output 15 [2023-02-17 20:40:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:15,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:40:15,884 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 27 treesize of output 25 [2023-02-17 20:40:15,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 230 treesize of output 218 [2023-02-17 20:40:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:16,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91554937] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:40:16,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:40:16,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2023-02-17 20:40:16,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657562234] [2023-02-17 20:40:16,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:40:16,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 20:40:16,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 20:40:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2023-02-17 20:40:16,179 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 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) [2023-02-17 20:40:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:16,521 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-02-17 20:40:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 20:40:16,522 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 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 [2023-02-17 20:40:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:16,522 INFO L225 Difference]: With dead ends: 50 [2023-02-17 20:40:16,522 INFO L226 Difference]: Without dead ends: 29 [2023-02-17 20:40:16,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 20:40:16,523 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 20:40:16,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 84 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 20:40:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-17 20:40:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-17 20:40:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:40:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-02-17 20:40:16,526 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2023-02-17 20:40:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:16,526 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-02-17 20:40:16,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 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) [2023-02-17 20:40:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-02-17 20:40:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 20:40:16,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:16,527 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:16,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 20:40:16,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:16,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1204846017, now seen corresponding path program 1 times [2023-02-17 20:40:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:16,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045792899] [2023-02-17 20:40:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 20:40:16,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045792899] [2023-02-17 20:40:16,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045792899] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:40:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471297066] [2023-02-17 20:40:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:16,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:16,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:40:16,817 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) [2023-02-17 20:40:16,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 20:40:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:16,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 20:40:16,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:40:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 20:40:16,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:40:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 20:40:17,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471297066] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:40:17,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:40:17,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-02-17 20:40:17,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138731126] [2023-02-17 20:40:17,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:40:17,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 20:40:17,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:17,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 20:40:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=263, Unknown=0, NotChecked=0, Total=462 [2023-02-17 20:40:17,004 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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) [2023-02-17 20:40:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:17,146 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2023-02-17 20:40:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 20:40:17,147 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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 26 [2023-02-17 20:40:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:17,147 INFO L225 Difference]: With dead ends: 120 [2023-02-17 20:40:17,148 INFO L226 Difference]: Without dead ends: 111 [2023-02-17 20:40:17,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=455, Unknown=0, NotChecked=0, Total=756 [2023-02-17 20:40:17,148 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 280 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 20:40:17,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 91 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 20:40:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-17 20:40:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 48. [2023-02-17 20:40:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 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) [2023-02-17 20:40:17,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-02-17 20:40:17,155 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 26 [2023-02-17 20:40:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:17,155 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-02-17 20:40:17,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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) [2023-02-17 20:40:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-02-17 20:40:17,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 20:40:17,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:17,156 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:17,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 20:40:17,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:17,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:17,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 3 times [2023-02-17 20:40:17,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:17,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940509070] [2023-02-17 20:40:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:17,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:17,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:17,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940509070] [2023-02-17 20:40:17,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940509070] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:40:17,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452055030] [2023-02-17 20:40:17,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 20:40:17,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:17,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:40:17,620 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) [2023-02-17 20:40:17,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 20:40:17,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 20:40:17,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 20:40:17,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 20:40:17,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:40:17,698 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 [2023-02-17 20:40:17,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:40:17,719 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 27 treesize of output 26 [2023-02-17 20:40:17,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:40:17,731 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 1 case distinctions, treesize of input 27 treesize of output 56 [2023-02-17 20:40:17,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:40:17,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2023-02-17 20:40:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:17,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:40:17,937 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 27 treesize of output 25 [2023-02-17 20:40:17,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 110 treesize of output 102 [2023-02-17 20:40:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 20:40:17,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452055030] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:40:17,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:40:17,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-02-17 20:40:17,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123918848] [2023-02-17 20:40:17,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:40:17,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 20:40:17,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:40:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 20:40:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-02-17 20:40:17,999 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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) [2023-02-17 20:40:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:40:18,131 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-02-17 20:40:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 20:40:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 20:40:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:40:18,133 INFO L225 Difference]: With dead ends: 57 [2023-02-17 20:40:18,133 INFO L226 Difference]: Without dead ends: 55 [2023-02-17 20:40:18,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 20:40:18,134 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 20:40:18,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 64 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 20:40:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-17 20:40:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2023-02-17 20:40:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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) [2023-02-17 20:40:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-02-17 20:40:18,139 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2023-02-17 20:40:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:40:18,139 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-02-17 20:40:18,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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) [2023-02-17 20:40:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-02-17 20:40:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 20:40:18,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:40:18,140 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 20:40:18,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 20:40:18,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:18,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:40:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:40:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 4 times [2023-02-17 20:40:18,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:40:18,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752127803] [2023-02-17 20:40:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:40:18,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:40:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:40:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:18,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:40:18,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752127803] [2023-02-17 20:40:18,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752127803] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:40:18,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46726843] [2023-02-17 20:40:18,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 20:40:18,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:40:18,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:40:18,577 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 20:40:18,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 20:40:18,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 20:40:18,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 20:40:18,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-17 20:40:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:40:18,682 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 [2023-02-17 20:40:18,711 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 32 treesize of output 31 [2023-02-17 20:40:18,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:40:18,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 120 [2023-02-17 20:40:18,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:40:18,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 19 [2023-02-17 20:40:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:40:18,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:40:19,311 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 75 treesize of output 71 [2023-02-17 20:40:19,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:40:19,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1459 treesize of output 1411