./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_m2.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 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-15 23:58:55,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 23:58:55,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 23:58:55,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 23:58:55,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 23:58:55,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 23:58:55,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 23:58:55,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 23:58:55,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 23:58:55,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 23:58:55,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 23:58:55,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 23:58:55,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 23:58:55,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 23:58:55,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 23:58:55,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 23:58:55,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 23:58:55,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 23:58:55,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 23:58:55,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 23:58:55,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 23:58:55,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 23:58:55,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 23:58:55,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 23:58:55,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 23:58:55,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 23:58:55,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 23:58:55,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 23:58:55,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 23:58:55,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 23:58:55,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 23:58:55,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 23:58:55,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 23:58:55,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 23:58:55,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 23:58:55,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 23:58:55,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 23:58:55,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 23:58:55,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 23:58:55,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 23:58:55,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 23:58:55,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 23:58:55,985 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 23:58:55,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 23:58:55,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 23:58:55,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 23:58:55,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 23:58:55,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 23:58:55,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 23:58:55,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 23:58:55,987 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 23:58:55,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 23:58:55,988 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 23:58:55,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 23:58:55,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 23:58:55,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 23:58:55,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 23:58:55,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 23:58:55,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 23:58:55,989 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 23:58:55,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 23:58:55,990 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 23:58:55,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 23:58:55,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 23:58:55,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 23:58:55,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 23:58:55,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:58:55,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 23:58:55,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 23:58:55,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 23:58:55,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 23:58:55,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 23:58:55,991 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 23:58:55,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 23:58:55,999 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 23:58:55,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 23:58:55,999 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 23:58:55,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f [2023-02-15 23:58:56,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 23:58:56,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 23:58:56,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 23:58:56,213 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 23:58:56,213 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 23:58:56,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m2.c [2023-02-15 23:58:57,291 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 23:58:57,402 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 23:58:57,402 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2023-02-15 23:58:57,406 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d8673e94/dc8f10e725c04d25aa65d2a07789b1c9/FLAG54aef07a1 [2023-02-15 23:58:57,418 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d8673e94/dc8f10e725c04d25aa65d2a07789b1c9 [2023-02-15 23:58:57,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 23:58:57,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 23:58:57,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 23:58:57,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 23:58:57,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 23:58:57,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf584e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57, skipping insertion in model container [2023-02-15 23:58:57,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 23:58:57,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 23:58:57,526 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-crafted/zero_sum_m2.c[402,415] [2023-02-15 23:58:57,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:58:57,544 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 23:58:57,551 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-crafted/zero_sum_m2.c[402,415] [2023-02-15 23:58:57,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:58:57,564 INFO L208 MainTranslator]: Completed translation [2023-02-15 23:58:57,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57 WrapperNode [2023-02-15 23:58:57,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 23:58:57,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 23:58:57,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 23:58:57,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 23:58:57,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,587 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-02-15 23:58:57,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 23:58:57,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 23:58:57,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 23:58:57,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 23:58:57,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,610 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 23:58:57,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 23:58:57,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 23:58:57,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 23:58:57,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (1/1) ... [2023-02-15 23:58:57,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:58:57,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:58:57,658 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) [2023-02-15 23:58:57,666 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 [2023-02-15 23:58:57,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 23:58:57,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 23:58:57,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 23:58:57,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 23:58:57,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 23:58:57,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 23:58:57,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 23:58:57,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 23:58:57,761 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 23:58:57,763 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 23:58:57,921 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 23:58:57,925 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 23:58:57,925 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-15 23:58:57,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:58:57 BoogieIcfgContainer [2023-02-15 23:58:57,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 23:58:57,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 23:58:57,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 23:58:57,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 23:58:57,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:58:57" (1/3) ... [2023-02-15 23:58:57,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6d5965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:58:57, skipping insertion in model container [2023-02-15 23:58:57,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:58:57" (2/3) ... [2023-02-15 23:58:57,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6d5965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:58:57, skipping insertion in model container [2023-02-15 23:58:57,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:58:57" (3/3) ... [2023-02-15 23:58:57,932 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2023-02-15 23:58:57,942 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 23:58:57,943 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 23:58:57,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 23:58:57,990 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;@363cfafa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 23:58:57,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 23:58:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:58:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 23:58:57,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:58:57,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:58:57,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:58:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:58:58,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2023-02-15 23:58:58,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:58:58,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347069181] [2023-02-15 23:58:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:58:58,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:58:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:58:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:58:58,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:58:58,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347069181] [2023-02-15 23:58:58,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347069181] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:58:58,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:58:58,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 23:58:58,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921213843] [2023-02-15 23:58:58,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:58:58,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 23:58:58,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:58:58,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 23:58:58,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 23:58:58,136 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2023-02-15 23:58:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:58:58,149 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2023-02-15 23:58:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 23:58:58,150 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 23:58:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:58:58,156 INFO L225 Difference]: With dead ends: 47 [2023-02-15 23:58:58,156 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 23:58:58,158 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 [2023-02-15 23:58:58,163 INFO L413 NwaCegarLoop]: 31 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, 31 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 [2023-02-15 23:58:58,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:58:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 23:58:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-15 23:58:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2023-02-15 23:58:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-15 23:58:58,188 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2023-02-15 23:58:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:58:58,189 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-15 23:58:58,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2023-02-15 23:58:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-15 23:58:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 23:58:58,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:58:58,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:58:58,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 23:58:58,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:58:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:58:58,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2023-02-15 23:58:58,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:58:58,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728630204] [2023-02-15 23:58:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:58:58,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:58:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:58:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:58:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:58:58,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728630204] [2023-02-15 23:58:58,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728630204] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:58:58,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:58:58,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 23:58:58,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055844099] [2023-02-15 23:58:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:58:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:58:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:58:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:58:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 23:58:58,336 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:58:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:58:58,367 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-02-15 23:58:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:58:58,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 23:58:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:58:58,375 INFO L225 Difference]: With dead ends: 39 [2023-02-15 23:58:58,375 INFO L226 Difference]: Without dead ends: 23 [2023-02-15 23:58:58,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 23:58:58,376 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:58:58,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:58:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-15 23:58:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-02-15 23:58:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2023-02-15 23:58:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-15 23:58:58,380 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-02-15 23:58:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:58:58,380 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-15 23:58:58,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:58:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-15 23:58:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 23:58:58,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:58:58,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:58:58,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 23:58:58,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:58:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:58:58,384 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2023-02-15 23:58:58,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:58:58,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425033531] [2023-02-15 23:58:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:58:58,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:58:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:58:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:58:58,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:58:58,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425033531] [2023-02-15 23:58:58,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425033531] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:58:58,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:58:58,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 23:58:58,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259980170] [2023-02-15 23:58:58,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:58:58,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 23:58:58,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:58:58,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 23:58:58,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 23:58:58,469 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:58:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:58:58,511 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-02-15 23:58:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 23:58:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 23:58:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:58:58,512 INFO L225 Difference]: With dead ends: 43 [2023-02-15 23:58:58,512 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 23:58:58,513 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 [2023-02-15 23:58:58,514 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:58:58,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 15 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:58:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 23:58:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2023-02-15 23:58:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2023-02-15 23:58:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-15 23:58:58,518 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2023-02-15 23:58:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:58:58,518 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-15 23:58:58,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:58:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-15 23:58:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 23:58:58,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:58:58,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:58:58,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 23:58:58,519 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:58:58,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:58:58,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2023-02-15 23:58:58,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:58:58,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587199273] [2023-02-15 23:58:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:58:58,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:58:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:58:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 23:58:58,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:58:58,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587199273] [2023-02-15 23:58:58,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587199273] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:58:58,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109102691] [2023-02-15 23:58:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:58:58,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:58:58,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:58:58,586 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) [2023-02-15 23:58:58,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 23:58:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:58:58,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 23:58:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:58:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 23:58:58,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:58:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 23:58:58,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109102691] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:58:58,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:58:58,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 23:58:58,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785743466] [2023-02-15 23:58:58,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:58:58,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 23:58:58,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:58:58,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 23:58:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:58:58,690 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:58:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:58:58,724 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2023-02-15 23:58:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 23:58:58,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 23:58:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:58:58,725 INFO L225 Difference]: With dead ends: 49 [2023-02-15 23:58:58,725 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 23:58:58,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:58:58,726 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:58:58,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:58:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 23:58:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-15 23:58:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:58:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-02-15 23:58:58,729 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2023-02-15 23:58:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:58:58,730 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-02-15 23:58:58,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:58:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-02-15 23:58:58,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 23:58:58,730 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:58:58,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:58:58,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 23:58:58,938 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 [2023-02-15 23:58:58,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:58:58,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:58:58,939 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2023-02-15 23:58:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:58:58,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335269873] [2023-02-15 23:58:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:58:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:58:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:58:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 23:58:59,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:58:59,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335269873] [2023-02-15 23:58:59,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335269873] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:58:59,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046201161] [2023-02-15 23:58:59,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:58:59,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:58:59,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:58:59,061 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) [2023-02-15 23:58:59,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 23:58:59,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:58:59,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:58:59,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 23:58:59,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:58:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 23:58:59,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:58:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 23:58:59,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046201161] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:58:59,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:58:59,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 23:58:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227085669] [2023-02-15 23:58:59,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:58:59,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 23:58:59,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:58:59,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 23:58:59,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-15 23:58:59,268 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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) [2023-02-15 23:58:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:58:59,323 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2023-02-15 23:58:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 23:58:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 [2023-02-15 23:58:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:58:59,324 INFO L225 Difference]: With dead ends: 56 [2023-02-15 23:58:59,324 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 23:58:59,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-15 23:58:59,325 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:58:59,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 15 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:58:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 23:58:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-02-15 23:58:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:58:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-02-15 23:58:59,329 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2023-02-15 23:58:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:58:59,329 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-02-15 23:58:59,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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) [2023-02-15 23:58:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-02-15 23:58:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 23:58:59,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:58:59,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:58:59,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 23:58:59,534 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 [2023-02-15 23:58:59,535 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:58:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:58:59,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2023-02-15 23:58:59,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:58:59,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51508414] [2023-02-15 23:58:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:58:59,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:58:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:59:01,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:59:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51508414] [2023-02-15 23:59:01,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51508414] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:59:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127504642] [2023-02-15 23:59:01,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:59:01,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:01,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:59:01,077 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) [2023-02-15 23:59:01,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 23:59:01,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 23:59:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:59:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 23:59:01,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:59:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:59:01,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:59:03,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 23:59:03,144 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 37 treesize of output 67 [2023-02-15 23:59:03,269 INFO L321 Elim1Store]: treesize reduction 50, result has 15.3 percent of original size [2023-02-15 23:59:03,270 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 37 treesize of output 17 [2023-02-15 23:59:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 23:59:03,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127504642] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:59:03,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:59:03,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 56 [2023-02-15 23:59:03,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462024543] [2023-02-15 23:59:03,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:59:03,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 23:59:03,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:59:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 23:59:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2866, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 23:59:03,418 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 56 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 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) [2023-02-15 23:59:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:59:04,579 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2023-02-15 23:59:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 23:59:04,580 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 23:59:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:59:04,580 INFO L225 Difference]: With dead ends: 63 [2023-02-15 23:59:04,581 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 23:59:04,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=304, Invalid=4118, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 23:59:04,583 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 23:59:04,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 23:59:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 23:59:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-02-15 23:59:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 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) [2023-02-15 23:59:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-02-15 23:59:04,588 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2023-02-15 23:59:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:59:04,588 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-02-15 23:59:04,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 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) [2023-02-15 23:59:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-02-15 23:59:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 23:59:04,589 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:59:04,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:59:04,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 23:59:04,789 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 [2023-02-15 23:59:04,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:59:04,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:59:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2023-02-15 23:59:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:59:04,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098940482] [2023-02-15 23:59:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:59:04,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:59:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 23:59:04,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:59:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098940482] [2023-02-15 23:59:04,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098940482] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:59:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441218582] [2023-02-15 23:59:04,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 23:59:04,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:04,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:59:04,874 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) [2023-02-15 23:59:04,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 23:59:04,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 23:59:04,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:59:04,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 23:59:04,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:59:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 23:59:05,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:59:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 23:59:05,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441218582] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:59:05,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:59:05,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 23:59:05,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129469069] [2023-02-15 23:59:05,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:59:05,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 23:59:05,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:59:05,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 23:59:05,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-15 23:59:05,060 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 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) [2023-02-15 23:59:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:59:05,245 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2023-02-15 23:59:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 23:59:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 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 37 [2023-02-15 23:59:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:59:05,246 INFO L225 Difference]: With dead ends: 138 [2023-02-15 23:59:05,246 INFO L226 Difference]: Without dead ends: 72 [2023-02-15 23:59:05,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-02-15 23:59:05,247 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:59:05,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 55 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:59:05,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-15 23:59:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2023-02-15 23:59:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 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) [2023-02-15 23:59:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-02-15 23:59:05,252 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2023-02-15 23:59:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:59:05,252 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-02-15 23:59:05,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 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) [2023-02-15 23:59:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-02-15 23:59:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 23:59:05,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:59:05,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:59:05,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 23:59:05,453 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 [2023-02-15 23:59:05,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:59:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:59:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2023-02-15 23:59:05,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:59:05,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202020090] [2023-02-15 23:59:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:59:05,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:59:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 23:59:05,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:59:05,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202020090] [2023-02-15 23:59:05,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202020090] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:59:05,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803160253] [2023-02-15 23:59:05,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 23:59:05,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:05,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:59:05,557 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) [2023-02-15 23:59:05,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 23:59:05,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 23:59:05,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:59:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 23:59:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:59:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 23:59:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:59:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 23:59:05,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803160253] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:59:05,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:59:05,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 23:59:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117205576] [2023-02-15 23:59:05,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:59:05,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 23:59:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:59:05,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 23:59:05,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-15 23:59:05,750 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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) [2023-02-15 23:59:05,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:59:05,888 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-02-15 23:59:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 23:59:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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 39 [2023-02-15 23:59:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:59:05,889 INFO L225 Difference]: With dead ends: 66 [2023-02-15 23:59:05,889 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 23:59:05,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2023-02-15 23:59:05,890 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 161 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:59:05,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 29 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:59:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 23:59:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-02-15 23:59:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 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) [2023-02-15 23:59:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-02-15 23:59:05,908 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2023-02-15 23:59:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:59:05,908 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-02-15 23:59:05,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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) [2023-02-15 23:59:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-02-15 23:59:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 23:59:05,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:59:05,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:59:05,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 23:59:06,114 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 [2023-02-15 23:59:06,116 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:59:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:59:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2023-02-15 23:59:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:59:06,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854211109] [2023-02-15 23:59:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:59:06,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:59:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:59:08,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:59:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854211109] [2023-02-15 23:59:08,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854211109] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:59:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943500232] [2023-02-15 23:59:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 23:59:08,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:59:08,043 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) [2023-02-15 23:59:08,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 23:59:08,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 23:59:08,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:59:08,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 23:59:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:59:08,139 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 [2023-02-15 23:59:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:59:09,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:59:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 23:59:10,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943500232] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:59:10,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:59:10,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29, 26] total 75 [2023-02-15 23:59:10,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486989804] [2023-02-15 23:59:10,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:59:10,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-02-15 23:59:10,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:59:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-02-15 23:59:10,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=5269, Unknown=0, NotChecked=0, Total=5550 [2023-02-15 23:59:10,314 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 75 states, 75 states have (on average 1.44) internal successors, (108), 75 states have internal predecessors, (108), 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) [2023-02-15 23:59:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:59:12,599 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2023-02-15 23:59:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 23:59:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.44) internal successors, (108), 75 states have internal predecessors, (108), 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 45 [2023-02-15 23:59:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:59:12,600 INFO L225 Difference]: With dead ends: 81 [2023-02-15 23:59:12,600 INFO L226 Difference]: Without dead ends: 77 [2023-02-15 23:59:12,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=566, Invalid=9334, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 23:59:12,603 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 23:59:12,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 150 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 23:59:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-15 23:59:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2023-02-15 23:59:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 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) [2023-02-15 23:59:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2023-02-15 23:59:12,615 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2023-02-15 23:59:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:59:12,617 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2023-02-15 23:59:12,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.44) internal successors, (108), 75 states have internal predecessors, (108), 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) [2023-02-15 23:59:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2023-02-15 23:59:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 23:59:12,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:59:12,619 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:59:12,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 23:59:12,823 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 [2023-02-15 23:59:12,824 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:59:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:59:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2023-02-15 23:59:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:59:12,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597973085] [2023-02-15 23:59:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:59:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:59:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 23:59:12,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:59:12,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597973085] [2023-02-15 23:59:12,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597973085] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:59:12,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638885909] [2023-02-15 23:59:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 23:59:12,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:59:12,922 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) [2023-02-15 23:59:12,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 23:59:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:12,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 23:59:12,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:59:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 23:59:13,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:59:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 23:59:13,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638885909] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:59:13,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:59:13,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-15 23:59:13,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123087344] [2023-02-15 23:59:13,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:59:13,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 23:59:13,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:59:13,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 23:59:13,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-02-15 23:59:13,131 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2023-02-15 23:59:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:59:13,274 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2023-02-15 23:59:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 23:59:13,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 47 [2023-02-15 23:59:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:59:13,275 INFO L225 Difference]: With dead ends: 132 [2023-02-15 23:59:13,275 INFO L226 Difference]: Without dead ends: 70 [2023-02-15 23:59:13,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-02-15 23:59:13,276 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:59:13,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 59 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:59:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-15 23:59:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2023-02-15 23:59:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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) [2023-02-15 23:59:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2023-02-15 23:59:13,291 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2023-02-15 23:59:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:59:13,291 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2023-02-15 23:59:13,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2023-02-15 23:59:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2023-02-15 23:59:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 23:59:13,294 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:59:13,294 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:59:13,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 23:59:13,499 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 [2023-02-15 23:59:13,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:59:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:59:13,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2023-02-15 23:59:13,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:59:13,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191132184] [2023-02-15 23:59:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:59:13,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:59:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 23:59:13,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:59:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191132184] [2023-02-15 23:59:13,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191132184] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:59:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706270984] [2023-02-15 23:59:13,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:59:13,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:13,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:59:13,579 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) [2023-02-15 23:59:13,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 23:59:13,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:59:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:59:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 23:59:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:59:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 23:59:13,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:59:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 23:59:13,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706270984] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:59:13,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:59:13,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-15 23:59:13,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700732635] [2023-02-15 23:59:13,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:59:13,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 23:59:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:59:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 23:59:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-02-15 23:59:13,749 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2023-02-15 23:59:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:59:13,882 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2023-02-15 23:59:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 23:59:13,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 49 [2023-02-15 23:59:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:59:13,883 INFO L225 Difference]: With dead ends: 101 [2023-02-15 23:59:13,883 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 23:59:13,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2023-02-15 23:59:13,884 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 207 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:59:13,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 34 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:59:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 23:59:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-02-15 23:59:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 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) [2023-02-15 23:59:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2023-02-15 23:59:13,888 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2023-02-15 23:59:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:59:13,888 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2023-02-15 23:59:13,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2023-02-15 23:59:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2023-02-15 23:59:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 23:59:13,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:59:13,888 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:59:13,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 23:59:14,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 23:59:14,095 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:59:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:59:14,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2023-02-15 23:59:14,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:59:14,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471084233] [2023-02-15 23:59:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:59:14,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:59:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:59:17,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:59:17,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471084233] [2023-02-15 23:59:17,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471084233] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:59:17,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842143068] [2023-02-15 23:59:17,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:59:17,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:17,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:59:17,218 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:59:17,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 23:59:17,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 23:59:17,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:59:17,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-15 23:59:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:59:17,318 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 [2023-02-15 23:59:22,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:59:22,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 23:59:22,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 47 [2023-02-15 23:59:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 23:59:22,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:59:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 23:59:36,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842143068] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:59:36,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:59:36,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 40, 38] total 116 [2023-02-15 23:59:36,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365546576] [2023-02-15 23:59:36,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:59:36,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-02-15 23:59:36,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:59:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-02-15 23:59:36,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=12748, Unknown=1, NotChecked=0, Total=13340 [2023-02-15 23:59:36,695 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 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) [2023-02-15 23:59:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:59:58,488 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2023-02-15 23:59:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 23:59:58,489 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 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 55 [2023-02-15 23:59:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:59:58,490 INFO L225 Difference]: With dead ends: 97 [2023-02-15 23:59:58,490 INFO L226 Difference]: Without dead ends: 93 [2023-02-15 23:59:58,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6241 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=1526, Invalid=27203, Unknown=1, NotChecked=0, Total=28730 [2023-02-15 23:59:58,494 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 4239 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 4404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-15 23:59:58,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 232 Invalid, 4404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4239 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-02-15 23:59:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-15 23:59:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2023-02-15 23:59:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2023-02-15 23:59:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2023-02-15 23:59:58,523 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2023-02-15 23:59:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:59:58,523 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2023-02-15 23:59:58,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 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) [2023-02-15 23:59:58,524 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2023-02-15 23:59:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 23:59:58,524 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:59:58,524 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:59:58,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 23:59:58,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:58,728 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:59:58,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:59:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2023-02-15 23:59:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:59:58,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493100647] [2023-02-15 23:59:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:59:58,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:59:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 23:59:58,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:59:58,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493100647] [2023-02-15 23:59:58,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493100647] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:59:58,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283759714] [2023-02-15 23:59:58,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 23:59:58,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:58,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:59:58,850 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:59:58,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 23:59:58,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 23:59:58,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:59:58,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 23:59:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:59:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 23:59:59,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:59:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 23:59:59,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283759714] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:59:59,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:59:59,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-15 23:59:59,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345056693] [2023-02-15 23:59:59,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:59:59,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 23:59:59,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:59:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 23:59:59,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-15 23:59:59,151 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 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) [2023-02-15 23:59:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:59:59,404 INFO L93 Difference]: Finished difference Result 206 states and 223 transitions. [2023-02-15 23:59:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 23:59:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 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 57 [2023-02-15 23:59:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:59:59,405 INFO L225 Difference]: With dead ends: 206 [2023-02-15 23:59:59,405 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 23:59:59,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 23:59:59,406 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 271 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 23:59:59,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 61 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 23:59:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 23:59:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2023-02-15 23:59:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 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) [2023-02-15 23:59:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2023-02-15 23:59:59,415 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2023-02-15 23:59:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:59:59,416 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2023-02-15 23:59:59,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 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) [2023-02-15 23:59:59,416 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2023-02-15 23:59:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 23:59:59,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:59:59,417 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:59:59,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 23:59:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 23:59:59,622 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:59:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:59:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2023-02-15 23:59:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:59:59,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152462604] [2023-02-15 23:59:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:59:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:59:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:59:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-15 23:59:59,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:59:59,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152462604] [2023-02-15 23:59:59,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152462604] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:59:59,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487190699] [2023-02-15 23:59:59,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 23:59:59,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:59:59,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:59:59,758 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:59:59,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 23:59:59,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 23:59:59,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:59:59,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 23:59:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:59:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-15 23:59:59,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:00:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-16 00:00:00,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487190699] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:00:00,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:00:00,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-16 00:00:00,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401757039] [2023-02-16 00:00:00,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:00:00,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 00:00:00,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:00:00,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 00:00:00,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-16 00:00:00,036 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:00:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:00:00,278 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2023-02-16 00:00:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 00:00:00,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 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 59 [2023-02-16 00:00:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:00:00,279 INFO L225 Difference]: With dead ends: 94 [2023-02-16 00:00:00,279 INFO L226 Difference]: Without dead ends: 70 [2023-02-16 00:00:00,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2023-02-16 00:00:00,279 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 187 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:00:00,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 49 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 00:00:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-16 00:00:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2023-02-16 00:00:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:00:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2023-02-16 00:00:00,288 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2023-02-16 00:00:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:00:00,289 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2023-02-16 00:00:00,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:00:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2023-02-16 00:00:00,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-16 00:00:00,289 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:00:00,289 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:00:00,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-16 00:00:00,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-16 00:00:00,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:00:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:00:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2023-02-16 00:00:00,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:00:00,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412126041] [2023-02-16 00:00:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:00:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:00:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:00:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:00:05,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:00:05,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412126041] [2023-02-16 00:00:05,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412126041] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:00:05,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34457239] [2023-02-16 00:00:05,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 00:00:05,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:00:05,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:00:05,029 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:00:05,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 00:00:05,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-16 00:00:05,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:00:05,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 110 conjunts are in the unsatisfiable core [2023-02-16 00:00:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:00:05,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-16 00:00:05,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-16 00:00:10,350 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:00:10,351 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:00:10,366 INFO L321 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2023-02-16 00:00:10,366 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 32 treesize of output 27 [2023-02-16 00:00:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:00:10,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:00:34,713 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:00:42,937 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:00:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:00:48,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34457239] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:00:48,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:00:48,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 50] total 148 [2023-02-16 00:00:48,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315253446] [2023-02-16 00:00:48,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:00:48,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2023-02-16 00:00:48,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:00:48,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2023-02-16 00:00:48,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=20628, Unknown=0, NotChecked=0, Total=21756 [2023-02-16 00:00:48,379 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 148 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 148 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:02:04,710 WARN L233 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 319 DAG size of output: 249 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:02:30,222 WARN L233 SmtUtils]: Spent 9.16s on a formula simplification. DAG size of input: 281 DAG size of output: 223 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:02:50,775 WARN L233 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 259 DAG size of output: 223 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:03:10,917 WARN L233 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 265 DAG size of output: 226 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:03:25,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:03:25,330 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2023-02-16 00:03:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-16 00:03:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 148 states have internal predecessors, (175), 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 65 [2023-02-16 00:03:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:03:25,331 INFO L225 Difference]: With dead ends: 112 [2023-02-16 00:03:25,331 INFO L226 Difference]: Without dead ends: 108 [2023-02-16 00:03:25,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11819 ImplicationChecksByTransitivity, 192.7s TimeCoverageRelationStatistics Valid=2565, Invalid=42166, Unknown=1, NotChecked=0, Total=44732 [2023-02-16 00:03:25,334 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 5311 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 5455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 5311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-02-16 00:03:25,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 225 Invalid, 5455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 5311 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-02-16 00:03:25,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-16 00:03:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2023-02-16 00:03:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:03:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2023-02-16 00:03:25,363 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2023-02-16 00:03:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:03:25,363 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2023-02-16 00:03:25,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 148 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:03:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2023-02-16 00:03:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-16 00:03:25,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:03:25,364 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:03:25,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 00:03:25,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 00:03:25,570 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:03:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:03:25,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2023-02-16 00:03:25,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:03:25,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5382228] [2023-02-16 00:03:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:03:25,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:03:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:03:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-02-16 00:03:25,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:03:25,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5382228] [2023-02-16 00:03:25,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5382228] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:03:25,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530367375] [2023-02-16 00:03:25,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 00:03:25,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:03:25,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:03:25,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:03:25,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 00:03:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:03:25,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 00:03:25,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:03:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-02-16 00:03:25,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:03:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-02-16 00:03:26,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530367375] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:03:26,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:03:26,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-16 00:03:26,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821806534] [2023-02-16 00:03:26,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:03:26,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 00:03:26,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:03:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 00:03:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-02-16 00:03:26,077 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:03:26,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:03:26,313 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2023-02-16 00:03:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 00:03:26,313 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 67 [2023-02-16 00:03:26,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:03:26,314 INFO L225 Difference]: With dead ends: 188 [2023-02-16 00:03:26,314 INFO L226 Difference]: Without dead ends: 98 [2023-02-16 00:03:26,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 114 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2023-02-16 00:03:26,315 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:03:26,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 53 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 00:03:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-16 00:03:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-02-16 00:03:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:03:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2023-02-16 00:03:26,329 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 67 [2023-02-16 00:03:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:03:26,329 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2023-02-16 00:03:26,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:03:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2023-02-16 00:03:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-16 00:03:26,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:03:26,330 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:03:26,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 00:03:26,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 00:03:26,536 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:03:26,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:03:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash 721627522, now seen corresponding path program 14 times [2023-02-16 00:03:26,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:03:26,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338880961] [2023-02-16 00:03:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:03:26,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:03:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:03:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-16 00:03:26,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:03:26,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338880961] [2023-02-16 00:03:26,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338880961] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:03:26,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706993625] [2023-02-16 00:03:26,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:03:26,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:03:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:03:26,787 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:03:26,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 00:03:26,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:03:26,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:03:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 00:03:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:03:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-16 00:03:27,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:03:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-16 00:03:27,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706993625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:03:27,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:03:27,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-16 00:03:27,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248643913] [2023-02-16 00:03:27,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:03:27,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 00:03:27,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:03:27,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 00:03:27,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-02-16 00:03:27,201 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:03:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:03:27,441 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2023-02-16 00:03:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 00:03:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 69 [2023-02-16 00:03:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:03:27,442 INFO L225 Difference]: With dead ends: 137 [2023-02-16 00:03:27,442 INFO L226 Difference]: Without dead ends: 80 [2023-02-16 00:03:27,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2023-02-16 00:03:27,443 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 281 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:03:27,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 31 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 00:03:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-16 00:03:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2023-02-16 00:03:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:03:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2023-02-16 00:03:27,452 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2023-02-16 00:03:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:03:27,453 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2023-02-16 00:03:27,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:03:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2023-02-16 00:03:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-16 00:03:27,453 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:03:27,453 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:03:27,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 00:03:27,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:03:27,659 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:03:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:03:27,660 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2023-02-16 00:03:27,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:03:27,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019096959] [2023-02-16 00:03:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:03:27,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:03:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat