./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 574ddb4e 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/termination-crafted/NestedRecursion_2b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 23:17:01,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 23:17:01,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 23:17:01,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 23:17:01,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 23:17:01,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 23:17:01,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 23:17:01,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 23:17:01,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 23:17:01,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 23:17:01,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 23:17:01,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 23:17:01,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 23:17:01,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 23:17:01,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 23:17:01,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 23:17:01,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 23:17:01,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 23:17:01,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 23:17:01,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 23:17:01,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 23:17:01,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 23:17:01,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 23:17:01,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 23:17:01,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 23:17:01,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 23:17:01,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 23:17:01,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 23:17:01,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 23:17:01,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 23:17:01,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 23:17:01,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 23:17:01,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 23:17:01,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 23:17:01,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 23:17:01,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 23:17:01,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 23:17:01,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 23:17:01,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 23:17:01,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 23:17:01,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 23:17:01,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2023-02-18 23:17:01,905 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 23:17:01,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 23:17:01,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 23:17:01,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 23:17:01,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 23:17:01,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 23:17:01,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 23:17:01,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 23:17:01,908 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 23:17:01,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 23:17:01,908 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 23:17:01,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 23:17:01,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 23:17:01,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 23:17:01,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 23:17:01,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 23:17:01,909 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-18 23:17:01,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 23:17:01,910 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 23:17:01,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 23:17:01,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 23:17:01,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 23:17:01,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 23:17:01,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 23:17:01,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 23:17:01,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 23:17:01,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 23:17:01,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 23:17:01,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 23:17:01,911 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 23:17:01,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 23:17:01,912 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 23:17:01,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 23:17:01,912 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 23:17:01,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2023-02-18 23:17:02,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 23:17:02,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 23:17:02,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 23:17:02,132 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 23:17:02,132 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 23:17:02,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2023-02-18 23:17:03,190 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 23:17:03,320 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 23:17:03,320 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2023-02-18 23:17:03,324 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a00313f2/d4c64cb7f6fd4e1eb3d40a8bd22ebb99/FLAGe8ae7034f [2023-02-18 23:17:03,763 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a00313f2/d4c64cb7f6fd4e1eb3d40a8bd22ebb99 [2023-02-18 23:17:03,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 23:17:03,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 23:17:03,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 23:17:03,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 23:17:03,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 23:17:03,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ac1106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03, skipping insertion in model container [2023-02-18 23:17:03,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 23:17:03,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 23:17:03,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 23:17:03,862 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 23:17:03,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 23:17:03,876 INFO L208 MainTranslator]: Completed translation [2023-02-18 23:17:03,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03 WrapperNode [2023-02-18 23:17:03,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 23:17:03,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 23:17:03,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 23:17:03,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 23:17:03,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,894 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2023-02-18 23:17:03,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 23:17:03,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 23:17:03,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 23:17:03,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 23:17:03,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,906 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 23:17:03,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 23:17:03,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 23:17:03,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 23:17:03,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (1/1) ... [2023-02-18 23:17:03,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 23:17:03,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:17:03,966 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) [2023-02-18 23:17:03,984 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 [2023-02-18 23:17:03,994 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-02-18 23:17:03,994 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-02-18 23:17:03,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 23:17:03,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 23:17:04,029 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 23:17:04,031 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 23:17:04,129 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 23:17:04,134 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 23:17:04,135 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-18 23:17:04,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:17:04 BoogieIcfgContainer [2023-02-18 23:17:04,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 23:17:04,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 23:17:04,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 23:17:04,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 23:17:04,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 11:17:03" (1/3) ... [2023-02-18 23:17:04,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d4e0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:17:04, skipping insertion in model container [2023-02-18 23:17:04,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:17:03" (2/3) ... [2023-02-18 23:17:04,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d4e0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:17:04, skipping insertion in model container [2023-02-18 23:17:04,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:17:04" (3/3) ... [2023-02-18 23:17:04,143 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2b.c [2023-02-18 23:17:04,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 23:17:04,155 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-02-18 23:17:04,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 23:17:04,203 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;@358e1abe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 23:17:04,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-02-18 23:17:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 23:17:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 23:17:04,212 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:04,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:17:04,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:04,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1134721268, now seen corresponding path program 1 times [2023-02-18 23:17:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:04,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775127688] [2023-02-18 23:17:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:04,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:04,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:04,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775127688] [2023-02-18 23:17:04,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775127688] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:17:04,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:17:04,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 23:17:04,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138302297] [2023-02-18 23:17:04,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:17:04,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 23:17:04,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 23:17:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 23:17:04,427 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:04,515 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-02-18 23:17:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 23:17:04,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 23:17:04,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:04,523 INFO L225 Difference]: With dead ends: 45 [2023-02-18 23:17:04,523 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 23:17:04,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 23:17:04,542 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:04,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 75 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 23:17:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 23:17:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-02-18 23:17:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 23:17:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-18 23:17:04,592 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2023-02-18 23:17:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:04,592 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-18 23:17:04,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-18 23:17:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 23:17:04,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:04,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:17:04,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 23:17:04,598 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash 816620978, now seen corresponding path program 1 times [2023-02-18 23:17:04,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:04,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847771547] [2023-02-18 23:17:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:04,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:04,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:04,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847771547] [2023-02-18 23:17:04,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847771547] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:17:04,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:17:04,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 23:17:04,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371529925] [2023-02-18 23:17:04,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:17:04,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 23:17:04,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 23:17:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 23:17:04,677 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:04,738 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-02-18 23:17:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 23:17:04,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 23:17:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:04,739 INFO L225 Difference]: With dead ends: 47 [2023-02-18 23:17:04,739 INFO L226 Difference]: Without dead ends: 46 [2023-02-18 23:17:04,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 23:17:04,740 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:04,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 54 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 23:17:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-18 23:17:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2023-02-18 23:17:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 32 states have internal predecessors, (39), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 23:17:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-02-18 23:17:04,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 8 [2023-02-18 23:17:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:04,751 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-02-18 23:17:04,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-02-18 23:17:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 23:17:04,752 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:04,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:17:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 23:17:04,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash 431664181, now seen corresponding path program 1 times [2023-02-18 23:17:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869189655] [2023-02-18 23:17:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:04,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869189655] [2023-02-18 23:17:04,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869189655] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:17:04,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24082991] [2023-02-18 23:17:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:04,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:17:04,817 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) [2023-02-18 23:17:04,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 23:17:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:04,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 23:17:04,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:17:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:04,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:17:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:04,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24082991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:17:04,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:17:04,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 23:17:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990401853] [2023-02-18 23:17:04,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:17:04,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 23:17:04,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 23:17:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 23:17:04,921 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 12 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:05,062 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2023-02-18 23:17:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 23:17:05,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 23:17:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:05,071 INFO L225 Difference]: With dead ends: 96 [2023-02-18 23:17:05,072 INFO L226 Difference]: Without dead ends: 95 [2023-02-18 23:17:05,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-18 23:17:05,073 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 139 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:05,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 104 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 23:17:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-18 23:17:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2023-02-18 23:17:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 59 states have internal predecessors, (75), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 23:17:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2023-02-18 23:17:05,096 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 12 [2023-02-18 23:17:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:05,096 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2023-02-18 23:17:05,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2023-02-18 23:17:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 23:17:05,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:05,097 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:17:05,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 23:17:05,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:05,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:05,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash 574996991, now seen corresponding path program 1 times [2023-02-18 23:17:05,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:05,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953597784] [2023-02-18 23:17:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:05,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 23:17:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:05,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953597784] [2023-02-18 23:17:05,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953597784] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:17:05,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:17:05,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 23:17:05,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936643183] [2023-02-18 23:17:05,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:17:05,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 23:17:05,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:05,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 23:17:05,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 23:17:05,341 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 23:17:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:05,371 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2023-02-18 23:17:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 23:17:05,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-18 23:17:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:05,376 INFO L225 Difference]: With dead ends: 77 [2023-02-18 23:17:05,376 INFO L226 Difference]: Without dead ends: 76 [2023-02-18 23:17:05,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 23:17:05,381 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:05,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 23:17:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-18 23:17:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-02-18 23:17:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 58 states have internal predecessors, (69), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 23:17:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2023-02-18 23:17:05,400 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 15 [2023-02-18 23:17:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:05,401 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2023-02-18 23:17:05,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 23:17:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2023-02-18 23:17:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 23:17:05,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:05,403 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:17:05,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 23:17:05,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash 645037581, now seen corresponding path program 1 times [2023-02-18 23:17:05,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:05,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283198266] [2023-02-18 23:17:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:05,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 23:17:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:05,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:05,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283198266] [2023-02-18 23:17:05,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283198266] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:17:05,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:17:05,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 23:17:05,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578012789] [2023-02-18 23:17:05,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:17:05,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 23:17:05,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 23:17:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 23:17:05,441 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 23:17:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:05,458 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2023-02-18 23:17:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 23:17:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-18 23:17:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:05,460 INFO L225 Difference]: With dead ends: 116 [2023-02-18 23:17:05,460 INFO L226 Difference]: Without dead ends: 115 [2023-02-18 23:17:05,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 23:17:05,462 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:05,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 23:17:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-18 23:17:05,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2023-02-18 23:17:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 80 states have internal predecessors, (92), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2023-02-18 23:17:05,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2023-02-18 23:17:05,471 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 16 [2023-02-18 23:17:05,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:05,472 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2023-02-18 23:17:05,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 23:17:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2023-02-18 23:17:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 23:17:05,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:05,473 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:17:05,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 23:17:05,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1915238450, now seen corresponding path program 1 times [2023-02-18 23:17:05,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:05,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539841774] [2023-02-18 23:17:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:05,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 23:17:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:05,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:05,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539841774] [2023-02-18 23:17:05,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539841774] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:17:05,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:17:05,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 23:17:05,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56204652] [2023-02-18 23:17:05,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:17:05,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 23:17:05,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 23:17:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 23:17:05,539 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 23:17:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:05,588 INFO L93 Difference]: Finished difference Result 132 states and 173 transitions. [2023-02-18 23:17:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 23:17:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-18 23:17:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:05,590 INFO L225 Difference]: With dead ends: 132 [2023-02-18 23:17:05,590 INFO L226 Difference]: Without dead ends: 80 [2023-02-18 23:17:05,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 23:17:05,597 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:05,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 23:17:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-18 23:17:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 51. [2023-02-18 23:17:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 42 states have internal predecessors, (45), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 1 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 23:17:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-02-18 23:17:05,602 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 20 [2023-02-18 23:17:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:05,602 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-02-18 23:17:05,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 23:17:05,602 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-02-18 23:17:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 23:17:05,603 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:05,603 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:17:05,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 23:17:05,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:05,603 INFO L85 PathProgramCache]: Analyzing trace with hash 757150232, now seen corresponding path program 1 times [2023-02-18 23:17:05,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:05,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608590356] [2023-02-18 23:17:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:05,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 23:17:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:05,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:05,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608590356] [2023-02-18 23:17:05,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608590356] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:17:05,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:17:05,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 23:17:05,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37103409] [2023-02-18 23:17:05,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:17:05,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 23:17:05,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:05,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 23:17:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 23:17:05,681 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 23:17:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:05,728 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-02-18 23:17:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 23:17:05,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-18 23:17:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:05,730 INFO L225 Difference]: With dead ends: 56 [2023-02-18 23:17:05,730 INFO L226 Difference]: Without dead ends: 55 [2023-02-18 23:17:05,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-18 23:17:05,731 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:05,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 49 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 23:17:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-18 23:17:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2023-02-18 23:17:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 23:17:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-02-18 23:17:05,747 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 21 [2023-02-18 23:17:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:05,747 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-02-18 23:17:05,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 23:17:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-02-18 23:17:05,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 23:17:05,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:05,748 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:17:05,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 23:17:05,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:05,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:05,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1990628763, now seen corresponding path program 2 times [2023-02-18 23:17:05,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:05,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099201013] [2023-02-18 23:17:05,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:05,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 23:17:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:05,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:05,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099201013] [2023-02-18 23:17:05,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099201013] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:17:05,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578564841] [2023-02-18 23:17:05,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 23:17:05,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:05,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:17:05,834 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) [2023-02-18 23:17:05,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 23:17:05,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 23:17:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:17:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 23:17:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:17:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:05,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:17:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:05,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578564841] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:17:05,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:17:05,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 23:17:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346205566] [2023-02-18 23:17:05,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:17:05,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 23:17:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 23:17:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-18 23:17:05,942 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 23:17:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:06,139 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2023-02-18 23:17:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 23:17:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-18 23:17:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:06,141 INFO L225 Difference]: With dead ends: 91 [2023-02-18 23:17:06,141 INFO L226 Difference]: Without dead ends: 76 [2023-02-18 23:17:06,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-02-18 23:17:06,144 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:06,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 83 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 23:17:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-18 23:17:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2023-02-18 23:17:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 1 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 23:17:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-02-18 23:17:06,152 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 25 [2023-02-18 23:17:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:06,152 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-02-18 23:17:06,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 23:17:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-02-18 23:17:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 23:17:06,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:06,153 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-18 23:17:06,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 23:17:06,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 23:17:06,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash -895487436, now seen corresponding path program 2 times [2023-02-18 23:17:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:06,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493253082] [2023-02-18 23:17:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:06,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:06,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493253082] [2023-02-18 23:17:06,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493253082] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:17:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388762889] [2023-02-18 23:17:06,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 23:17:06,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:17:06,459 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) [2023-02-18 23:17:06,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 23:17:06,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 23:17:06,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:17:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 23:17:06,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:17:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:06,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:17:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:06,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388762889] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:17:06,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:17:06,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-18 23:17:06,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882920895] [2023-02-18 23:17:06,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:17:06,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 23:17:06,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 23:17:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-18 23:17:06,648 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 24 states, 21 states have (on average 2.0) internal successors, (42), 14 states have internal predecessors, (42), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:06,896 INFO L93 Difference]: Finished difference Result 147 states and 165 transitions. [2023-02-18 23:17:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 23:17:06,896 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 14 states have internal predecessors, (42), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 23:17:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:06,897 INFO L225 Difference]: With dead ends: 147 [2023-02-18 23:17:06,897 INFO L226 Difference]: Without dead ends: 146 [2023-02-18 23:17:06,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 23:17:06,898 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 332 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:06,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 118 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 23:17:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-18 23:17:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 89. [2023-02-18 23:17:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 74 states have internal predecessors, (76), 13 states have call successors, (13), 13 states have call predecessors, (13), 10 states have return successors, (10), 1 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 23:17:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-02-18 23:17:06,904 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 27 [2023-02-18 23:17:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:06,905 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-02-18 23:17:06,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 14 states have internal predecessors, (42), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-02-18 23:17:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 23:17:06,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:06,906 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:17:06,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 23:17:07,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:07,111 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1029918734, now seen corresponding path program 3 times [2023-02-18 23:17:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:07,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078177895] [2023-02-18 23:17:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:07,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:07,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 23:17:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:07,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:07,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078177895] [2023-02-18 23:17:07,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078177895] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:17:07,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107187884] [2023-02-18 23:17:07,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 23:17:07,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:07,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:17:07,221 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) [2023-02-18 23:17:07,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 23:17:07,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-18 23:17:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:17:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 23:17:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:17:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:07,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:17:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:17:07,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107187884] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:17:07,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:17:07,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-18 23:17:07,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249860864] [2023-02-18 23:17:07,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:17:07,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 23:17:07,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:07,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 23:17:07,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2023-02-18 23:17:07,470 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 23:17:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:07,561 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2023-02-18 23:17:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 23:17:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-02-18 23:17:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:07,562 INFO L225 Difference]: With dead ends: 120 [2023-02-18 23:17:07,562 INFO L226 Difference]: Without dead ends: 58 [2023-02-18 23:17:07,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 23:17:07,564 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:07,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 90 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 23:17:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-18 23:17:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-18 23:17:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2023-02-18 23:17:07,570 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 40 [2023-02-18 23:17:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:07,570 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2023-02-18 23:17:07,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 23:17:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2023-02-18 23:17:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 23:17:07,575 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:07,575 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2023-02-18 23:17:07,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 23:17:07,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:07,783 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:07,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash -130937836, now seen corresponding path program 3 times [2023-02-18 23:17:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:07,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119383649] [2023-02-18 23:17:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:08,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:08,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119383649] [2023-02-18 23:17:08,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119383649] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:17:08,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784103288] [2023-02-18 23:17:08,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 23:17:08,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:08,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:17:08,059 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) [2023-02-18 23:17:08,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 23:17:08,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 23:17:08,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:17:08,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 23:17:08,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:17:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:08,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:17:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:08,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784103288] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:17:08,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:17:08,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-18 23:17:08,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299285952] [2023-02-18 23:17:08,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:17:08,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 23:17:08,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 23:17:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 23:17:08,628 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 48 states, 45 states have (on average 2.0) internal successors, (90), 26 states have internal predecessors, (90), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:08,979 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2023-02-18 23:17:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 23:17:08,980 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.0) internal successors, (90), 26 states have internal predecessors, (90), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-18 23:17:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:08,980 INFO L225 Difference]: With dead ends: 121 [2023-02-18 23:17:08,980 INFO L226 Difference]: Without dead ends: 120 [2023-02-18 23:17:08,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 70 SyntacticMatches, 20 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2023-02-18 23:17:08,982 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 225 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:08,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 43 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 23:17:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-18 23:17:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2023-02-18 23:17:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2023-02-18 23:17:08,987 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 57 [2023-02-18 23:17:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:08,987 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2023-02-18 23:17:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.0) internal successors, (90), 26 states have internal predecessors, (90), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2023-02-18 23:17:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-18 23:17:08,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:08,989 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2023-02-18 23:17:09,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 23:17:09,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 23:17:09,190 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:09,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:09,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2074912724, now seen corresponding path program 4 times [2023-02-18 23:17:09,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:09,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511227048] [2023-02-18 23:17:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:09,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:10,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:10,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511227048] [2023-02-18 23:17:10,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511227048] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:17:10,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898746048] [2023-02-18 23:17:10,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 23:17:10,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:10,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:17:10,029 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) [2023-02-18 23:17:10,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 23:17:10,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 23:17:10,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:17:10,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 23:17:10,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:17:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:10,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:17:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:11,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898746048] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:17:11,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:17:11,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2023-02-18 23:17:11,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681970341] [2023-02-18 23:17:11,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:17:11,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-02-18 23:17:11,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:11,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-02-18 23:17:11,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2023-02-18 23:17:11,813 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 96 states, 93 states have (on average 2.0) internal successors, (186), 50 states have internal predecessors, (186), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:12,794 INFO L93 Difference]: Finished difference Result 241 states and 264 transitions. [2023-02-18 23:17:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-02-18 23:17:12,795 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 2.0) internal successors, (186), 50 states have internal predecessors, (186), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-02-18 23:17:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:12,796 INFO L225 Difference]: With dead ends: 241 [2023-02-18 23:17:12,796 INFO L226 Difference]: Without dead ends: 240 [2023-02-18 23:17:12,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 142 SyntacticMatches, 44 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5527 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5549, Invalid=14473, Unknown=0, NotChecked=0, Total=20022 [2023-02-18 23:17:12,800 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 629 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:12,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 52 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 23:17:12,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-18 23:17:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2023-02-18 23:17:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2023-02-18 23:17:12,809 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 117 [2023-02-18 23:17:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:12,810 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2023-02-18 23:17:12,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 2.0) internal successors, (186), 50 states have internal predecessors, (186), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2023-02-18 23:17:12,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-02-18 23:17:12,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:12,814 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2023-02-18 23:17:12,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 23:17:13,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:13,019 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1774419796, now seen corresponding path program 5 times [2023-02-18 23:17:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:13,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313293972] [2023-02-18 23:17:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:15,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313293972] [2023-02-18 23:17:15,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313293972] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:17:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159976803] [2023-02-18 23:17:15,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 23:17:15,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:15,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:17:15,769 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) [2023-02-18 23:17:15,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 23:17:15,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-02-18 23:17:15,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:17:15,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-18 23:17:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:17:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:17,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:17:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:21,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159976803] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:17:21,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:17:21,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2023-02-18 23:17:21,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045394474] [2023-02-18 23:17:21,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:17:21,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2023-02-18 23:17:21,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:17:21,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2023-02-18 23:17:21,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2023-02-18 23:17:21,694 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand has 192 states, 189 states have (on average 2.0) internal successors, (378), 98 states have internal predecessors, (378), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:17:26,541 INFO L93 Difference]: Finished difference Result 481 states and 528 transitions. [2023-02-18 23:17:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-02-18 23:17:26,542 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 189 states have (on average 2.0) internal successors, (378), 98 states have internal predecessors, (378), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2023-02-18 23:17:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:17:26,543 INFO L225 Difference]: With dead ends: 481 [2023-02-18 23:17:26,543 INFO L226 Difference]: Without dead ends: 480 [2023-02-18 23:17:26,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 286 SyntacticMatches, 92 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23695 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=22613, Invalid=58897, Unknown=0, NotChecked=0, Total=81510 [2023-02-18 23:17:26,548 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1517 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 23:17:26,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1517 Valid, 42 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 23:17:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-02-18 23:17:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 478. [2023-02-18 23:17:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 382 states have (on average 1.0026178010471205) internal successors, (383), 382 states have internal predecessors, (383), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:26,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2023-02-18 23:17:26,562 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 237 [2023-02-18 23:17:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:17:26,562 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2023-02-18 23:17:26,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 189 states have (on average 2.0) internal successors, (378), 98 states have internal predecessors, (378), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:17:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2023-02-18 23:17:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-02-18 23:17:26,567 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:17:26,567 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 94, 94, 94, 1, 1, 1, 1, 1] [2023-02-18 23:17:26,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 23:17:26,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:26,777 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:17:26,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:17:26,778 INFO L85 PathProgramCache]: Analyzing trace with hash 750235220, now seen corresponding path program 6 times [2023-02-18 23:17:26,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:17:26,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226130473] [2023-02-18 23:17:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:17:26,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:17:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:17:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:37,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:17:37,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226130473] [2023-02-18 23:17:37,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226130473] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:17:37,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797831783] [2023-02-18 23:17:37,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 23:17:37,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:17:37,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:17:37,320 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) [2023-02-18 23:17:37,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 23:17:37,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2023-02-18 23:17:37,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:17:37,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 192 conjunts are in the unsatisfiable core [2023-02-18 23:17:37,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:17:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:17:43,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:18:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:18:01,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797831783] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:18:01,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:18:01,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2023-02-18 23:18:01,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356417601] [2023-02-18 23:18:01,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:18:01,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2023-02-18 23:18:01,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:18:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2023-02-18 23:18:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2023-02-18 23:18:01,950 INFO L87 Difference]: Start difference. First operand 478 states and 478 transitions. Second operand has 384 states, 381 states have (on average 2.0) internal successors, (762), 194 states have internal predecessors, (762), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:18:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:18:26,578 INFO L93 Difference]: Finished difference Result 961 states and 1056 transitions. [2023-02-18 23:18:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-02-18 23:18:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 381 states have (on average 2.0) internal successors, (762), 194 states have internal predecessors, (762), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2023-02-18 23:18:26,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:18:26,583 INFO L225 Difference]: With dead ends: 961 [2023-02-18 23:18:26,583 INFO L226 Difference]: Without dead ends: 960 [2023-02-18 23:18:26,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 574 SyntacticMatches, 188 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98047 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2023-02-18 23:18:26,597 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3529 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3529 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 23:18:26,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3529 Valid, 48 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 23:18:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2023-02-18 23:18:26,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 958. [2023-02-18 23:18:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 766 states have (on average 1.0013054830287207) internal successors, (767), 766 states have internal predecessors, (767), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:18:26,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 958 transitions. [2023-02-18 23:18:26,633 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 958 transitions. Word has length 477 [2023-02-18 23:18:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:18:26,634 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 958 transitions. [2023-02-18 23:18:26,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 381 states have (on average 2.0) internal successors, (762), 194 states have internal predecessors, (762), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:18:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 958 transitions. [2023-02-18 23:18:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2023-02-18 23:18:26,652 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:18:26,652 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 190, 190, 190, 1, 1, 1, 1, 1] [2023-02-18 23:18:26,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 23:18:26,858 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,SelfDestructingSolverStorable13 [2023-02-18 23:18:26,858 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:18:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:18:26,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1606028372, now seen corresponding path program 7 times [2023-02-18 23:18:26,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:18:26,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893466155] [2023-02-18 23:18:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:18:26,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:18:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:19:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:19:25,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:19:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893466155] [2023-02-18 23:19:25,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893466155] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:19:25,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043789292] [2023-02-18 23:19:25,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 23:19:25,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:19:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:19:25,838 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) [2023-02-18 23:19:25,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 23:19:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:19:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 384 conjunts are in the unsatisfiable core [2023-02-18 23:19:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:19:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:19:49,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:20:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:20:46,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043789292] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:20:46,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:20:46,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2023-02-18 23:20:46,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434104431] [2023-02-18 23:20:46,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:20:46,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2023-02-18 23:20:46,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:20:46,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2023-02-18 23:20:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147076, Invalid=441980, Unknown=0, NotChecked=0, Total=589056 [2023-02-18 23:20:46,226 INFO L87 Difference]: Start difference. First operand 958 states and 958 transitions. Second operand has 768 states, 765 states have (on average 2.0) internal successors, (1530), 386 states have internal predecessors, (1530), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:24:31,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:24:31,299 INFO L93 Difference]: Finished difference Result 1921 states and 2112 transitions. [2023-02-18 23:24:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2023-02-18 23:24:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 765 states have (on average 2.0) internal successors, (1530), 386 states have internal predecessors, (1530), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 957 [2023-02-18 23:24:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:24:31,323 INFO L225 Difference]: With dead ends: 1921 [2023-02-18 23:24:31,323 INFO L226 Difference]: Without dead ends: 1920 [2023-02-18 23:24:31,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2678 GetRequests, 1150 SyntacticMatches, 380 SemanticMatches, 1148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398815 ImplicationChecksByTransitivity, 157.5s TimeCoverageRelationStatistics Valid=366917, Invalid=954433, Unknown=0, NotChecked=0, Total=1321350 [2023-02-18 23:24:31,399 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9185 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 3469 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9185 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 3471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-18 23:24:31,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9185 Valid, 46 Invalid, 3471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3469 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-18 23:24:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2023-02-18 23:24:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1918. [2023-02-18 23:24:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1534 states have (on average 1.0006518904823989) internal successors, (1535), 1534 states have internal predecessors, (1535), 383 states have call successors, (383), 383 states have call predecessors, (383), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:24:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 1918 transitions. [2023-02-18 23:24:31,451 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 1918 transitions. Word has length 957 [2023-02-18 23:24:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:24:31,452 INFO L495 AbstractCegarLoop]: Abstraction has 1918 states and 1918 transitions. [2023-02-18 23:24:31,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 765 states have (on average 2.0) internal successors, (1530), 386 states have internal predecessors, (1530), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 23:24:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 1918 transitions. [2023-02-18 23:24:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1918 [2023-02-18 23:24:31,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:24:31,478 INFO L195 NwaCegarLoop]: trace histogram [383, 383, 382, 382, 382, 1, 1, 1, 1, 1] [2023-02-18 23:24:31,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 23:24:31,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 23:24:31,684 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-18 23:24:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:24:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash 170313812, now seen corresponding path program 8 times [2023-02-18 23:24:31,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:24:31,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162223260] [2023-02-18 23:24:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:24:31,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:24:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:30:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 365001 backedges. 0 proven. 365001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:30:16,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:30:16,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162223260] [2023-02-18 23:30:16,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162223260] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:30:16,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512052178] [2023-02-18 23:30:16,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 23:30:16,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:30:16,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:30:16,761 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) [2023-02-18 23:30:16,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 23:30:17,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 23:30:17,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:30:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 3452 conjuncts, 768 conjunts are in the unsatisfiable core [2023-02-18 23:30:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates...