./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e8d55036 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_2c.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 e757bed859e5dfb8bc677e07409ebb4da6a15dd0898403a302646229a6409be5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 22:52:06,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 22:52:06,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 22:52:06,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 22:52:06,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 22:52:06,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 22:52:06,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 22:52:06,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 22:52:06,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 22:52:06,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 22:52:06,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 22:52:06,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 22:52:06,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 22:52:06,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 22:52:06,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 22:52:06,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 22:52:06,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 22:52:06,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 22:52:06,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 22:52:06,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 22:52:06,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 22:52:06,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 22:52:06,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 22:52:06,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 22:52:06,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 22:52:06,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 22:52:06,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 22:52:06,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 22:52:06,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 22:52:06,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 22:52:06,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 22:52:06,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 22:52:06,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 22:52:06,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 22:52:06,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 22:52:06,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 22:52:06,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 22:52:06,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 22:52:06,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 22:52:06,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 22:52:06,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 22:52:06,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2023-02-15 22:52:07,017 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 22:52:07,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 22:52:07,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 22:52:07,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 22:52:07,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 22:52:07,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 22:52:07,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 22:52:07,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 22:52:07,019 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 22:52:07,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 22:52:07,019 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 22:52:07,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 22:52:07,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 22:52:07,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 22:52:07,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 22:52:07,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 22:52:07,020 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-15 22:52:07,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 22:52:07,020 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 22:52:07,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 22:52:07,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 22:52:07,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 22:52:07,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 22:52:07,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:52:07,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 22:52:07,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 22:52:07,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 22:52:07,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 22:52:07,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 22:52:07,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 22:52:07,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 22:52:07,021 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 22:52:07,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 22:52:07,021 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 22:52:07,021 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e757bed859e5dfb8bc677e07409ebb4da6a15dd0898403a302646229a6409be5 [2023-02-15 22:52:07,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 22:52:07,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 22:52:07,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 22:52:07,221 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 22:52:07,222 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 22:52:07,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2023-02-15 22:52:08,257 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 22:52:08,381 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 22:52:08,381 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2023-02-15 22:52:08,390 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d200d8e4/4142b61fd3c047858dd9ac673c79af01/FLAG8fb1015ce [2023-02-15 22:52:08,401 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d200d8e4/4142b61fd3c047858dd9ac673c79af01 [2023-02-15 22:52:08,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 22:52:08,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 22:52:08,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 22:52:08,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 22:52:08,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 22:52:08,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d95202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08, skipping insertion in model container [2023-02-15 22:52:08,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 22:52:08,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 22:52:08,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:52:08,547 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 22:52:08,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:52:08,562 INFO L208 MainTranslator]: Completed translation [2023-02-15 22:52:08,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08 WrapperNode [2023-02-15 22:52:08,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 22:52:08,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 22:52:08,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 22:52:08,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 22:52:08,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,580 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2023-02-15 22:52:08,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 22:52:08,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 22:52:08,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 22:52:08,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 22:52:08,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,590 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 22:52:08,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 22:52:08,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 22:52:08,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 22:52:08,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (1/1) ... [2023-02-15 22:52:08,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:52:08,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:08,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 22:52:08,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 22:52:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-02-15 22:52:08,640 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-02-15 22:52:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 22:52:08,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 22:52:08,672 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 22:52:08,673 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 22:52:08,744 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 22:52:08,748 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 22:52:08,749 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 22:52:08,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:52:08 BoogieIcfgContainer [2023-02-15 22:52:08,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 22:52:08,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 22:52:08,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 22:52:08,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 22:52:08,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:52:08" (1/3) ... [2023-02-15 22:52:08,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1f974d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:52:08, skipping insertion in model container [2023-02-15 22:52:08,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:52:08" (2/3) ... [2023-02-15 22:52:08,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1f974d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:52:08, skipping insertion in model container [2023-02-15 22:52:08,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:52:08" (3/3) ... [2023-02-15 22:52:08,755 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c.c [2023-02-15 22:52:08,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 22:52:08,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-02-15 22:52:08,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 22:52:08,801 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;@6a7f295c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 22:52:08,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-02-15 22:52:08,804 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) [2023-02-15 22:52:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 22:52:08,809 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:08,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:08,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:08,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1134721268, now seen corresponding path program 1 times [2023-02-15 22:52:08,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:08,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558412493] [2023-02-15 22:52:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:08,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558412493] [2023-02-15 22:52:08,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558412493] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:08,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:52:08,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:52:08,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588643464] [2023-02-15 22:52:08,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:08,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:52:08,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:52:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:52:08,957 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) [2023-02-15 22:52:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:09,090 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-02-15 22:52:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:52:09,100 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 [2023-02-15 22:52:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:09,109 INFO L225 Difference]: With dead ends: 45 [2023-02-15 22:52:09,109 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 22:52:09,111 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 [2023-02-15 22:52:09,113 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-15 22:52:09,114 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] [2023-02-15 22:52:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 22:52:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-02-15 22:52:09,147 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) [2023-02-15 22:52:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-15 22:52:09,159 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2023-02-15 22:52:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:09,159 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-15 22:52:09,159 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) [2023-02-15 22:52:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-15 22:52:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:52:09,160 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:09,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:09,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 22:52:09,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash 816620978, now seen corresponding path program 1 times [2023-02-15 22:52:09,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:09,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652474137] [2023-02-15 22:52:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:09,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:09,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652474137] [2023-02-15 22:52:09,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652474137] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:09,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:52:09,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:52:09,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202527979] [2023-02-15 22:52:09,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:09,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:52:09,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:09,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:52:09,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:52:09,215 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) [2023-02-15 22:52:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:09,270 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-02-15 22:52:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:52:09,270 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 [2023-02-15 22:52:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:09,271 INFO L225 Difference]: With dead ends: 47 [2023-02-15 22:52:09,271 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 22:52:09,272 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 [2023-02-15 22:52:09,273 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:09,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 54 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 22:52:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2023-02-15 22:52:09,279 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) [2023-02-15 22:52:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-02-15 22:52:09,281 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 8 [2023-02-15 22:52:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:09,281 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-02-15 22:52:09,281 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) [2023-02-15 22:52:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-02-15 22:52:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 22:52:09,282 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:09,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:09,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 22:52:09,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash 431664181, now seen corresponding path program 1 times [2023-02-15 22:52:09,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:09,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190506013] [2023-02-15 22:52:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:09,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190506013] [2023-02-15 22:52:09,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190506013] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:09,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749285969] [2023-02-15 22:52:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:09,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:09,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:09,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:09,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 22:52:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:09,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 22:52:09,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:09,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:09,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749285969] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:09,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:09,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-15 22:52:09,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016988813] [2023-02-15 22:52:09,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:09,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:52:09,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:09,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:52:09,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:52:09,587 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) [2023-02-15 22:52:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:09,790 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2023-02-15 22:52:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 22:52:09,790 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 [2023-02-15 22:52:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:09,795 INFO L225 Difference]: With dead ends: 96 [2023-02-15 22:52:09,795 INFO L226 Difference]: Without dead ends: 95 [2023-02-15 22:52:09,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-15 22:52:09,797 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 [2023-02-15 22:52:09,797 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] [2023-02-15 22:52:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-15 22:52:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2023-02-15 22:52:09,808 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) [2023-02-15 22:52:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2023-02-15 22:52:09,809 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 12 [2023-02-15 22:52:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:09,809 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2023-02-15 22:52:09,809 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) [2023-02-15 22:52:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2023-02-15 22:52:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 22:52:09,810 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:09,810 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:09,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 22:52:10,014 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 [2023-02-15 22:52:10,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 574996991, now seen corresponding path program 1 times [2023-02-15 22:52:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:10,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093548384] [2023-02-15 22:52:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:10,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:10,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093548384] [2023-02-15 22:52:10,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093548384] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:10,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:52:10,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:52:10,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448100149] [2023-02-15 22:52:10,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:10,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:52:10,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:10,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:52:10,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:52:10,072 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2023-02-15 22:52:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:10,107 INFO L93 Difference]: Finished difference Result 117 states and 166 transitions. [2023-02-15 22:52:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:52:10,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 [2023-02-15 22:52:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:10,110 INFO L225 Difference]: With dead ends: 117 [2023-02-15 22:52:10,111 INFO L226 Difference]: Without dead ends: 116 [2023-02-15 22:52:10,111 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 [2023-02-15 22:52:10,112 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:10,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-15 22:52:10,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2023-02-15 22:52:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 75 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) [2023-02-15 22:52:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2023-02-15 22:52:10,129 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 15 [2023-02-15 22:52:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:10,129 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2023-02-15 22:52:10,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2023-02-15 22:52:10,130 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2023-02-15 22:52:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 22:52:10,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:10,130 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:10,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 22:52:10,130 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:10,131 INFO L85 PathProgramCache]: Analyzing trace with hash 645037581, now seen corresponding path program 1 times [2023-02-15 22:52:10,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:10,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692784025] [2023-02-15 22:52:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:10,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:10,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:10,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692784025] [2023-02-15 22:52:10,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692784025] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:10,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:52:10,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:52:10,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845137130] [2023-02-15 22:52:10,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:10,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:52:10,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:10,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:52:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:52:10,171 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-02-15 22:52:10,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:10,192 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2023-02-15 22:52:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:52:10,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 [2023-02-15 22:52:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:10,194 INFO L225 Difference]: With dead ends: 99 [2023-02-15 22:52:10,195 INFO L226 Difference]: Without dead ends: 98 [2023-02-15 22:52:10,196 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 [2023-02-15 22:52:10,197 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 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 [2023-02-15 22:52:10,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-15 22:52:10,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-02-15 22:52:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 74 states have internal predecessors, (86), 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) [2023-02-15 22:52:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2023-02-15 22:52:10,209 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 16 [2023-02-15 22:52:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:10,209 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2023-02-15 22:52:10,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-02-15 22:52:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2023-02-15 22:52:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 22:52:10,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:10,210 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 22:52:10,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:10,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1915238450, now seen corresponding path program 1 times [2023-02-15 22:52:10,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:10,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409212386] [2023-02-15 22:52:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:10,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:10,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:10,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409212386] [2023-02-15 22:52:10,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409212386] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:10,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:52:10,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:52:10,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274410883] [2023-02-15 22:52:10,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:10,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:52:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:52:10,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:52:10,260 INFO L87 Difference]: Start difference. First operand 98 states and 121 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) [2023-02-15 22:52:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:10,339 INFO L93 Difference]: Finished difference Result 137 states and 175 transitions. [2023-02-15 22:52:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:52:10,340 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 [2023-02-15 22:52:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:10,343 INFO L225 Difference]: With dead ends: 137 [2023-02-15 22:52:10,343 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 22:52:10,343 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 [2023-02-15 22:52:10,345 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:10,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 74 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:10,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 22:52:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2023-02-15 22:52:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 98 states have internal predecessors, (107), 22 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (32), 20 states have call predecessors, (32), 19 states have call successors, (32) [2023-02-15 22:52:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2023-02-15 22:52:10,376 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 20 [2023-02-15 22:52:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:10,376 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2023-02-15 22:52:10,377 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) [2023-02-15 22:52:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2023-02-15 22:52:10,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 22:52:10,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:10,377 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:10,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 22:52:10,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash 757150232, now seen corresponding path program 1 times [2023-02-15 22:52:10,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:10,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517574182] [2023-02-15 22:52:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:10,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:10,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517574182] [2023-02-15 22:52:10,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517574182] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:10,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:52:10,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:52:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387129587] [2023-02-15 22:52:10,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:10,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:52:10,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:52:10,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:52:10,437 INFO L87 Difference]: Start difference. First operand 126 states and 161 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) [2023-02-15 22:52:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:10,515 INFO L93 Difference]: Finished difference Result 156 states and 201 transitions. [2023-02-15 22:52:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:52:10,516 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 [2023-02-15 22:52:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:10,517 INFO L225 Difference]: With dead ends: 156 [2023-02-15 22:52:10,517 INFO L226 Difference]: Without dead ends: 155 [2023-02-15 22:52:10,517 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 [2023-02-15 22:52:10,517 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:10,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 73 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-15 22:52:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2023-02-15 22:52:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 112 states have internal predecessors, (122), 25 states have call successors, (25), 8 states have call predecessors, (25), 13 states have return successors, (37), 23 states have call predecessors, (37), 22 states have call successors, (37) [2023-02-15 22:52:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 184 transitions. [2023-02-15 22:52:10,527 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 184 transitions. Word has length 21 [2023-02-15 22:52:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:10,527 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 184 transitions. [2023-02-15 22:52:10,527 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) [2023-02-15 22:52:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 184 transitions. [2023-02-15 22:52:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 22:52:10,528 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:10,528 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:10,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 22:52:10,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1990628763, now seen corresponding path program 2 times [2023-02-15 22:52:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:10,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022431686] [2023-02-15 22:52:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:10,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:10,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:10,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022431686] [2023-02-15 22:52:10,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022431686] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:10,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800692362] [2023-02-15 22:52:10,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:52:10,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:10,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:10,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:10,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 22:52:10,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:52:10,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:10,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 22:52:10,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:10,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:10,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800692362] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:10,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:10,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 22:52:10,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649284818] [2023-02-15 22:52:10,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:10,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 22:52:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:10,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 22:52:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-15 22:52:10,803 INFO L87 Difference]: Start difference. First operand 144 states and 184 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) [2023-02-15 22:52:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:11,100 INFO L93 Difference]: Finished difference Result 215 states and 277 transitions. [2023-02-15 22:52:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 22:52:11,100 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 [2023-02-15 22:52:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:11,104 INFO L225 Difference]: With dead ends: 215 [2023-02-15 22:52:11,104 INFO L226 Difference]: Without dead ends: 214 [2023-02-15 22:52:11,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2023-02-15 22:52:11,106 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 134 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:11,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 137 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:52:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-15 22:52:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 198. [2023-02-15 22:52:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.176056338028169) internal successors, (167), 154 states have internal predecessors, (167), 34 states have call successors, (34), 11 states have call predecessors, (34), 19 states have return successors, (52), 32 states have call predecessors, (52), 31 states have call successors, (52) [2023-02-15 22:52:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 253 transitions. [2023-02-15 22:52:11,124 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 253 transitions. Word has length 25 [2023-02-15 22:52:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:11,124 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 253 transitions. [2023-02-15 22:52:11,124 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) [2023-02-15 22:52:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 253 transitions. [2023-02-15 22:52:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 22:52:11,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:11,125 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-15 22:52:11,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 22:52:11,332 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 [2023-02-15 22:52:11,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:11,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:11,333 INFO L85 PathProgramCache]: Analyzing trace with hash -895487436, now seen corresponding path program 2 times [2023-02-15 22:52:11,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:11,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327118401] [2023-02-15 22:52:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:11,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:11,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:11,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327118401] [2023-02-15 22:52:11,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327118401] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:11,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51981044] [2023-02-15 22:52:11,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:52:11,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:11,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:11,433 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:11,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 22:52:11,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:52:11,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:11,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 22:52:11,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:11,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:11,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51981044] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:11,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:11,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-15 22:52:11,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522339084] [2023-02-15 22:52:11,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:11,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 22:52:11,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 22:52:11,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-15 22:52:11,672 INFO L87 Difference]: Start difference. First operand 198 states and 253 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) [2023-02-15 22:52:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:12,022 INFO L93 Difference]: Finished difference Result 319 states and 414 transitions. [2023-02-15 22:52:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 22:52:12,022 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 [2023-02-15 22:52:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:12,024 INFO L225 Difference]: With dead ends: 319 [2023-02-15 22:52:12,024 INFO L226 Difference]: Without dead ends: 318 [2023-02-15 22:52:12,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 22:52:12,025 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 312 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:12,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 248 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:52:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-15 22:52:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 306. [2023-02-15 22:52:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 220 states have (on average 1.1681818181818182) internal successors, (257), 238 states have internal predecessors, (257), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2023-02-15 22:52:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 391 transitions. [2023-02-15 22:52:12,040 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 391 transitions. Word has length 27 [2023-02-15 22:52:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:12,040 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 391 transitions. [2023-02-15 22:52:12,040 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) [2023-02-15 22:52:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 391 transitions. [2023-02-15 22:52:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 22:52:12,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:12,041 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:12,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 22:52:12,245 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 [2023-02-15 22:52:12,245 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash -126444680, now seen corresponding path program 1 times [2023-02-15 22:52:12,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567382094] [2023-02-15 22:52:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:12,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 22:52:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:52:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:12,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:12,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567382094] [2023-02-15 22:52:12,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567382094] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:12,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:52:12,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:52:12,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218135183] [2023-02-15 22:52:12,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:12,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:52:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:12,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:52:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:52:12,288 INFO L87 Difference]: Start difference. First operand 306 states and 391 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 22:52:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:12,306 INFO L93 Difference]: Finished difference Result 306 states and 391 transitions. [2023-02-15 22:52:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:52:12,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2023-02-15 22:52:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:12,308 INFO L225 Difference]: With dead ends: 306 [2023-02-15 22:52:12,308 INFO L226 Difference]: Without dead ends: 305 [2023-02-15 22:52:12,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:52:12,309 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 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 [2023-02-15 22:52:12,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-02-15 22:52:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-02-15 22:52:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 220 states have (on average 1.0909090909090908) internal successors, (240), 237 states have internal predecessors, (240), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2023-02-15 22:52:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 374 transitions. [2023-02-15 22:52:12,322 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 374 transitions. Word has length 31 [2023-02-15 22:52:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:12,322 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 374 transitions. [2023-02-15 22:52:12,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 22:52:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 374 transitions. [2023-02-15 22:52:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 22:52:12,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:12,323 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:12,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 22:52:12,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash 801174005, now seen corresponding path program 1 times [2023-02-15 22:52:12,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:12,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180591758] [2023-02-15 22:52:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:12,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 22:52:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:52:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:12,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:12,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180591758] [2023-02-15 22:52:12,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180591758] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:12,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:52:12,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:52:12,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912761775] [2023-02-15 22:52:12,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:12,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:52:12,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:12,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:52:12,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:52:12,418 INFO L87 Difference]: Start difference. First operand 305 states and 374 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 22:52:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:12,487 INFO L93 Difference]: Finished difference Result 325 states and 398 transitions. [2023-02-15 22:52:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 22:52:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-02-15 22:52:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:12,489 INFO L225 Difference]: With dead ends: 325 [2023-02-15 22:52:12,489 INFO L226 Difference]: Without dead ends: 324 [2023-02-15 22:52:12,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:52:12,490 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:12,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 67 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-02-15 22:52:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2023-02-15 22:52:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 232 states have (on average 1.0948275862068966) internal successors, (254), 249 states have internal predecessors, (254), 55 states have call successors, (55), 18 states have call predecessors, (55), 32 states have return successors, (70), 53 states have call predecessors, (70), 52 states have call successors, (70) [2023-02-15 22:52:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 379 transitions. [2023-02-15 22:52:12,503 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 379 transitions. Word has length 36 [2023-02-15 22:52:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:12,503 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 379 transitions. [2023-02-15 22:52:12,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 22:52:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 379 transitions. [2023-02-15 22:52:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 22:52:12,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:12,504 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:12,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 22:52:12,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash -933409583, now seen corresponding path program 1 times [2023-02-15 22:52:12,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:12,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781997977] [2023-02-15 22:52:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:12,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 22:52:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:52:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:12,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:12,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781997977] [2023-02-15 22:52:12,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781997977] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:12,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:52:12,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:52:12,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467280062] [2023-02-15 22:52:12,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:12,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:52:12,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:52:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:52:12,557 INFO L87 Difference]: Start difference. First operand 321 states and 379 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 22:52:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:12,631 INFO L93 Difference]: Finished difference Result 322 states and 379 transitions. [2023-02-15 22:52:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 22:52:12,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2023-02-15 22:52:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:12,633 INFO L225 Difference]: With dead ends: 322 [2023-02-15 22:52:12,633 INFO L226 Difference]: Without dead ends: 321 [2023-02-15 22:52:12,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:52:12,634 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:12,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 62 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-02-15 22:52:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2023-02-15 22:52:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 232 states have (on average 1.0862068965517242) internal successors, (252), 248 states have internal predecessors, (252), 55 states have call successors, (55), 18 states have call predecessors, (55), 32 states have return successors, (70), 53 states have call predecessors, (70), 52 states have call successors, (70) [2023-02-15 22:52:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 377 transitions. [2023-02-15 22:52:12,646 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 377 transitions. Word has length 37 [2023-02-15 22:52:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:12,646 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 377 transitions. [2023-02-15 22:52:12,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 22:52:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 377 transitions. [2023-02-15 22:52:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 22:52:12,647 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:12,647 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:12,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 22:52:12,648 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1029918734, now seen corresponding path program 3 times [2023-02-15 22:52:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:12,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280931693] [2023-02-15 22:52:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:12,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:12,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280931693] [2023-02-15 22:52:12,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280931693] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:12,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524376732] [2023-02-15 22:52:12,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:52:12,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:12,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:12,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:12,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 22:52:12,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-15 22:52:12,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:12,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 22:52:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:12,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:12,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524376732] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:12,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:12,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 22:52:12,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549459436] [2023-02-15 22:52:12,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:12,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 22:52:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 22:52:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2023-02-15 22:52:12,949 INFO L87 Difference]: Start difference. First operand 320 states and 377 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) [2023-02-15 22:52:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:13,567 INFO L93 Difference]: Finished difference Result 456 states and 580 transitions. [2023-02-15 22:52:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 22:52:13,567 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 [2023-02-15 22:52:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:13,569 INFO L225 Difference]: With dead ends: 456 [2023-02-15 22:52:13,569 INFO L226 Difference]: Without dead ends: 455 [2023-02-15 22:52:13,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=2406, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 22:52:13,571 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 480 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:13,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 156 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 22:52:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-02-15 22:52:13,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 428. [2023-02-15 22:52:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 310 states have (on average 1.0838709677419356) internal successors, (336), 332 states have internal predecessors, (336), 73 states have call successors, (73), 24 states have call predecessors, (73), 44 states have return successors, (94), 71 states have call predecessors, (94), 70 states have call successors, (94) [2023-02-15 22:52:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 503 transitions. [2023-02-15 22:52:13,597 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 503 transitions. Word has length 40 [2023-02-15 22:52:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:13,597 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 503 transitions. [2023-02-15 22:52:13,598 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) [2023-02-15 22:52:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 503 transitions. [2023-02-15 22:52:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 22:52:13,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:13,598 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:13,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 22:52:13,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:13,803 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:13,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:13,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1938510892, now seen corresponding path program 2 times [2023-02-15 22:52:13,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:13,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838068018] [2023-02-15 22:52:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:13,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:13,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:13,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 22:52:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:13,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:52:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:13,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838068018] [2023-02-15 22:52:13,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838068018] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995491750] [2023-02-15 22:52:13,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:52:13,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:13,862 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:13,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 22:52:13,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:52:13,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:13,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 22:52:13,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:13,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:13,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995491750] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:13,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:13,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-15 22:52:13,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375682668] [2023-02-15 22:52:13,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:13,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 22:52:13,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 22:52:13,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-02-15 22:52:13,998 INFO L87 Difference]: Start difference. First operand 428 states and 503 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 22:52:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:14,276 INFO L93 Difference]: Finished difference Result 483 states and 569 transitions. [2023-02-15 22:52:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 22:52:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2023-02-15 22:52:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:14,279 INFO L225 Difference]: With dead ends: 483 [2023-02-15 22:52:14,279 INFO L226 Difference]: Without dead ends: 482 [2023-02-15 22:52:14,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 22:52:14,280 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:14,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 81 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:52:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-02-15 22:52:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2023-02-15 22:52:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 349 states have (on average 1.0830945558739256) internal successors, (378), 374 states have internal predecessors, (378), 82 states have call successors, (82), 27 states have call predecessors, (82), 50 states have return successors, (106), 80 states have call predecessors, (106), 79 states have call successors, (106) [2023-02-15 22:52:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 566 transitions. [2023-02-15 22:52:14,298 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 566 transitions. Word has length 41 [2023-02-15 22:52:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:14,298 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 566 transitions. [2023-02-15 22:52:14,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 22:52:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 566 transitions. [2023-02-15 22:52:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 22:52:14,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:14,299 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2023-02-15 22:52:14,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 22:52:14,513 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,SelfDestructingSolverStorable13 [2023-02-15 22:52:14,513 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash -130937836, now seen corresponding path program 3 times [2023-02-15 22:52:14,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:14,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845429610] [2023-02-15 22:52:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:14,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:14,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:14,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845429610] [2023-02-15 22:52:14,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845429610] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:14,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938850139] [2023-02-15 22:52:14,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:52:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:14,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:14,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 22:52:14,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-15 22:52:14,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 22:52:14,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:14,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:15,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938850139] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:15,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:15,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-15 22:52:15,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428601310] [2023-02-15 22:52:15,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:15,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 22:52:15,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:15,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 22:52:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 22:52:15,311 INFO L87 Difference]: Start difference. First operand 482 states and 566 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) [2023-02-15 22:52:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:16,299 INFO L93 Difference]: Finished difference Result 703 states and 908 transitions. [2023-02-15 22:52:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-15 22:52:16,299 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 [2023-02-15 22:52:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:16,302 INFO L225 Difference]: With dead ends: 703 [2023-02-15 22:52:16,302 INFO L226 Difference]: Without dead ends: 702 [2023-02-15 22:52:16,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-15 22:52:16,304 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 960 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:16,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 345 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:52:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-02-15 22:52:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 698. [2023-02-15 22:52:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 505 states have (on average 1.0811881188118813) internal successors, (546), 542 states have internal predecessors, (546), 118 states have call successors, (118), 39 states have call predecessors, (118), 74 states have return successors, (154), 116 states have call predecessors, (154), 115 states have call successors, (154) [2023-02-15 22:52:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 818 transitions. [2023-02-15 22:52:16,328 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 818 transitions. Word has length 57 [2023-02-15 22:52:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:16,328 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 818 transitions. [2023-02-15 22:52:16,328 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) [2023-02-15 22:52:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 818 transitions. [2023-02-15 22:52:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 22:52:16,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:16,330 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:16,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 22:52:16,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 22:52:16,536 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash -731848523, now seen corresponding path program 3 times [2023-02-15 22:52:16,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:16,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078345919] [2023-02-15 22:52:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:16,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:16,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:16,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 22:52:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:16,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:52:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 42 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:16,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:16,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078345919] [2023-02-15 22:52:16,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078345919] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:16,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092781943] [2023-02-15 22:52:16,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:52:16,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:16,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:16,691 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:16,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 22:52:16,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 22:52:16,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 22:52:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 42 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:16,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 42 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:16,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092781943] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:16,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:16,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-15 22:52:16,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115233399] [2023-02-15 22:52:16,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:16,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 22:52:16,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:16,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 22:52:16,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2023-02-15 22:52:16,975 INFO L87 Difference]: Start difference. First operand 698 states and 818 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 16 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 22:52:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:17,783 INFO L93 Difference]: Finished difference Result 807 states and 950 transitions. [2023-02-15 22:52:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-15 22:52:17,784 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 16 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 56 [2023-02-15 22:52:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:17,786 INFO L225 Difference]: With dead ends: 807 [2023-02-15 22:52:17,787 INFO L226 Difference]: Without dead ends: 806 [2023-02-15 22:52:17,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1544, Invalid=4936, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 22:52:17,789 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:17,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 108 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 22:52:17,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2023-02-15 22:52:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 410. [2023-02-15 22:52:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 307 states have (on average 1.1140065146579805) internal successors, (342), 308 states have internal predecessors, (342), 69 states have call successors, (69), 34 states have call predecessors, (69), 33 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-02-15 22:52:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 478 transitions. [2023-02-15 22:52:17,807 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 478 transitions. Word has length 56 [2023-02-15 22:52:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:17,807 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 478 transitions. [2023-02-15 22:52:17,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 16 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 22:52:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 478 transitions. [2023-02-15 22:52:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 22:52:17,809 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:17,809 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:17,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 22:52:18,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:18,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -760270738, now seen corresponding path program 4 times [2023-02-15 22:52:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133025271] [2023-02-15 22:52:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:18,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:18,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 75 proven. 255 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:52:18,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:18,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133025271] [2023-02-15 22:52:18,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133025271] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:18,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266888853] [2023-02-15 22:52:18,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 22:52:18,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:18,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:18,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:18,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 22:52:18,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 22:52:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:18,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 22:52:18,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-02-15 22:52:18,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:52:18,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266888853] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:18,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:52:18,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 30 [2023-02-15 22:52:18,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139253616] [2023-02-15 22:52:18,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:18,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:52:18,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:18,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:52:18,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2023-02-15 22:52:18,385 INFO L87 Difference]: Start difference. First operand 410 states and 478 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:52:18,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:18,431 INFO L93 Difference]: Finished difference Result 940 states and 1197 transitions. [2023-02-15 22:52:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:52:18,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-02-15 22:52:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:18,434 INFO L225 Difference]: With dead ends: 940 [2023-02-15 22:52:18,434 INFO L226 Difference]: Without dead ends: 643 [2023-02-15 22:52:18,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 22:52:18,438 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:18,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 60 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-02-15 22:52:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 608. [2023-02-15 22:52:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 440 states have (on average 1.0772727272727274) internal successors, (474), 472 states have internal predecessors, (474), 102 states have call successors, (102), 35 states have call predecessors, (102), 65 states have return successors, (133), 100 states have call predecessors, (133), 100 states have call successors, (133) [2023-02-15 22:52:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 709 transitions. [2023-02-15 22:52:18,461 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 709 transitions. Word has length 70 [2023-02-15 22:52:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:18,461 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 709 transitions. [2023-02-15 22:52:18,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:52:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 709 transitions. [2023-02-15 22:52:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-15 22:52:18,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:18,463 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:18,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 22:52:18,670 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,SelfDestructingSolverStorable16 [2023-02-15 22:52:18,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:18,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1701536469, now seen corresponding path program 4 times [2023-02-15 22:52:18,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:18,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725758979] [2023-02-15 22:52:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:18,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:18,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:18,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 22:52:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:18,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:52:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 158 proven. 255 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:18,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:18,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725758979] [2023-02-15 22:52:18,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725758979] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:18,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564758839] [2023-02-15 22:52:18,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 22:52:18,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:18,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:18,976 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:18,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 22:52:19,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 22:52:19,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:19,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 22:52:19,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 158 proven. 255 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:19,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 158 proven. 255 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:19,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564758839] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:19,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:19,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-15 22:52:19,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257922804] [2023-02-15 22:52:19,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:19,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 22:52:19,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 22:52:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 22:52:19,610 INFO L87 Difference]: Start difference. First operand 608 states and 709 transitions. Second operand has 52 states, 51 states have (on average 2.156862745098039) internal successors, (110), 28 states have internal predecessors, (110), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 22:52:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:21,849 INFO L93 Difference]: Finished difference Result 825 states and 973 transitions. [2023-02-15 22:52:21,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-02-15 22:52:21,849 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.156862745098039) internal successors, (110), 28 states have internal predecessors, (110), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 86 [2023-02-15 22:52:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:21,852 INFO L225 Difference]: With dead ends: 825 [2023-02-15 22:52:21,852 INFO L226 Difference]: Without dead ends: 824 [2023-02-15 22:52:21,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7926 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6524, Invalid=20536, Unknown=0, NotChecked=0, Total=27060 [2023-02-15 22:52:21,858 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 850 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:21,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 153 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 22:52:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-02-15 22:52:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2023-02-15 22:52:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 596 states have (on average 1.0771812080536913) internal successors, (642), 640 states have internal predecessors, (642), 138 states have call successors, (138), 47 states have call predecessors, (138), 89 states have return successors, (181), 136 states have call predecessors, (181), 136 states have call successors, (181) [2023-02-15 22:52:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 961 transitions. [2023-02-15 22:52:21,882 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 961 transitions. Word has length 86 [2023-02-15 22:52:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:21,883 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 961 transitions. [2023-02-15 22:52:21,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.156862745098039) internal successors, (110), 28 states have internal predecessors, (110), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 22:52:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 961 transitions. [2023-02-15 22:52:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-15 22:52:21,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:21,885 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2023-02-15 22:52:21,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 22:52:22,089 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,SelfDestructingSolverStorable17 [2023-02-15 22:52:22,089 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2074912724, now seen corresponding path program 4 times [2023-02-15 22:52:22,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:22,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071459328] [2023-02-15 22:52:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:22,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:22,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:22,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071459328] [2023-02-15 22:52:22,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071459328] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075621977] [2023-02-15 22:52:22,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 22:52:22,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:22,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:22,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:22,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 22:52:22,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 22:52:22,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 22:52:22,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:23,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:24,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075621977] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:24,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:24,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2023-02-15 22:52:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670849319] [2023-02-15 22:52:24,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:24,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-02-15 22:52:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-02-15 22:52:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2023-02-15 22:52:24,594 INFO L87 Difference]: Start difference. First operand 824 states and 961 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) [2023-02-15 22:52:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:27,715 INFO L93 Difference]: Finished difference Result 1259 states and 1559 transitions. [2023-02-15 22:52:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2023-02-15 22:52:27,716 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 [2023-02-15 22:52:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:27,720 INFO L225 Difference]: With dead ends: 1259 [2023-02-15 22:52:27,720 INFO L226 Difference]: Without dead ends: 1258 [2023-02-15 22:52:27,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8243 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10631, Invalid=23779, Unknown=0, NotChecked=0, Total=34410 [2023-02-15 22:52:27,723 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 2168 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 1211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2172 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1211 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:27,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2172 Valid, 808 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1211 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 22:52:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2023-02-15 22:52:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2023-02-15 22:52:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 908 states have (on average 1.077092511013216) internal successors, (978), 976 states have internal predecessors, (978), 210 states have call successors, (210), 71 states have call predecessors, (210), 137 states have return successors, (277), 208 states have call predecessors, (277), 208 states have call successors, (277) [2023-02-15 22:52:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1465 transitions. [2023-02-15 22:52:27,782 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1465 transitions. Word has length 117 [2023-02-15 22:52:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:27,782 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1465 transitions. [2023-02-15 22:52:27,782 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) [2023-02-15 22:52:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1465 transitions. [2023-02-15 22:52:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-02-15 22:52:27,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:27,785 INFO L195 NwaCegarLoop]: trace histogram [27, 25, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:52:27,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 22:52:27,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:27,990 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1006567189, now seen corresponding path program 5 times [2023-02-15 22:52:27,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:27,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351714635] [2023-02-15 22:52:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:27,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:28,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:52:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:28,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 22:52:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:28,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:52:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 326 proven. 1221 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 22:52:28,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:28,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351714635] [2023-02-15 22:52:28,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351714635] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:28,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070525888] [2023-02-15 22:52:28,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 22:52:28,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:28,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:28,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:28,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 22:52:28,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-15 22:52:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 22:52:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 1194 trivial. 0 not checked. [2023-02-15 22:52:29,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:52:29,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070525888] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:52:29,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:52:29,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [50] total 56 [2023-02-15 22:52:29,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016464980] [2023-02-15 22:52:29,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:52:29,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:52:29,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:29,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:52:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2416, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 22:52:29,031 INFO L87 Difference]: Start difference. First operand 1256 states and 1465 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 22:52:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:29,130 INFO L93 Difference]: Finished difference Result 1591 states and 1891 transitions. [2023-02-15 22:52:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:52:29,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 146 [2023-02-15 22:52:29,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:29,131 INFO L225 Difference]: With dead ends: 1591 [2023-02-15 22:52:29,131 INFO L226 Difference]: Without dead ends: 240 [2023-02-15 22:52:29,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=802, Invalid=2738, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 22:52:29,134 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:29,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:52:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-15 22:52:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2023-02-15 22:52:29,140 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) [2023-02-15 22:52:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2023-02-15 22:52:29,141 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 146 [2023-02-15 22:52:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:29,141 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2023-02-15 22:52:29,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 22:52:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2023-02-15 22:52:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-02-15 22:52:29,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:29,143 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2023-02-15 22:52:29,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 22:52:29,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:29,348 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1774419796, now seen corresponding path program 5 times [2023-02-15 22:52:29,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:29,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516932288] [2023-02-15 22:52:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:29,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:32,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:32,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516932288] [2023-02-15 22:52:32,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516932288] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:32,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781027] [2023-02-15 22:52:32,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 22:52:32,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:32,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:32,295 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:32,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 22:52:32,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-02-15 22:52:32,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:32,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-15 22:52:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:32,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:52:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:38,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781027] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:52:38,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:52:38,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2023-02-15 22:52:38,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314273132] [2023-02-15 22:52:38,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:52:38,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2023-02-15 22:52:38,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:52:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2023-02-15 22:52:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2023-02-15 22:52:38,070 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) [2023-02-15 22:52:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:52:43,185 INFO L93 Difference]: Finished difference Result 481 states and 528 transitions. [2023-02-15 22:52:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-02-15 22:52:43,185 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 [2023-02-15 22:52:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:52:43,187 INFO L225 Difference]: With dead ends: 481 [2023-02-15 22:52:43,187 INFO L226 Difference]: Without dead ends: 480 [2023-02-15 22:52:43,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17484 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=22613, Invalid=58897, Unknown=0, NotChecked=0, Total=81510 [2023-02-15 22:52:43,192 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1457 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:52:43,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1457 Valid, 74 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:52:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-02-15 22:52:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 478. [2023-02-15 22:52:43,204 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) [2023-02-15 22:52:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2023-02-15 22:52:43,205 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 237 [2023-02-15 22:52:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:52:43,205 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2023-02-15 22:52:43,206 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) [2023-02-15 22:52:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2023-02-15 22:52:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-02-15 22:52:43,209 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:52:43,210 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 94, 94, 94, 1, 1, 1, 1, 1] [2023-02-15 22:52:43,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 22:52:43,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-15 22:52:43,414 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:52:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:52:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash 750235220, now seen corresponding path program 6 times [2023-02-15 22:52:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:52:43,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953278960] [2023-02-15 22:52:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:52:43,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:52:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:52:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:56,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:52:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953278960] [2023-02-15 22:52:56,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953278960] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:52:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557980299] [2023-02-15 22:52:56,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 22:52:56,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:52:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:52:56,106 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:52:56,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 22:52:56,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2023-02-15 22:52:56,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:52:56,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 192 conjunts are in the unsatisfiable core [2023-02-15 22:52:56,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:52:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:52:56,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:53:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:53:17,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557980299] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:53:17,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:53:17,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2023-02-15 22:53:17,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215621244] [2023-02-15 22:53:17,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:53:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2023-02-15 22:53:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:53:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2023-02-15 22:53:17,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2023-02-15 22:53:17,475 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) [2023-02-15 22:53:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:53:45,528 INFO L93 Difference]: Finished difference Result 961 states and 1056 transitions. [2023-02-15 22:53:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-02-15 22:53:45,529 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 [2023-02-15 22:53:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:53:45,532 INFO L225 Difference]: With dead ends: 961 [2023-02-15 22:53:45,532 INFO L226 Difference]: Without dead ends: 960 [2023-02-15 22:53:45,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 761 SyntacticMatches, 1 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2023-02-15 22:53:45,553 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3601 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3601 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 22:53:45,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3601 Valid, 65 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 22:53:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2023-02-15 22:53:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 958. [2023-02-15 22:53:45,576 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) [2023-02-15 22:53:45,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 958 transitions. [2023-02-15 22:53:45,578 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 958 transitions. Word has length 477 [2023-02-15 22:53:45,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:53:45,579 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 958 transitions. [2023-02-15 22:53:45,579 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) [2023-02-15 22:53:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 958 transitions. [2023-02-15 22:53:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2023-02-15 22:53:45,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:53:45,593 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 190, 190, 190, 1, 1, 1, 1, 1] [2023-02-15 22:53:45,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 22:53:45,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 22:53:45,799 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-02-15 22:53:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:53:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1606028372, now seen corresponding path program 7 times [2023-02-15 22:53:45,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:53:45,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060679304] [2023-02-15 22:53:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:53:45,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:53:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:54:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:54:49,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:54:49,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060679304] [2023-02-15 22:54:49,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060679304] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:54:49,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483556162] [2023-02-15 22:54:49,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 22:54:49,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:54:49,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:54:49,657 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:54:49,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 22:54:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:54:49,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 384 conjunts are in the unsatisfiable core [2023-02-15 22:54:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:54:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:54:50,854 INFO L328 TraceCheckSpWp]: Computing backward predicates...