./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 20ed64ec 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/loop-zilu/benchmark01_conjunctive.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 943a72d31eebdcd925e39756b65615d2a6fd2676 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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 11:28:28,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 11:28:28,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 11:28:28,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 11:28:28,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 11:28:28,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 11:28:28,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 11:28:28,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 11:28:28,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 11:28:28,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 11:28:28,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 11:28:28,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 11:28:28,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 11:28:28,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 11:28:28,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 11:28:28,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 11:28:28,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 11:28:28,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 11:28:28,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 11:28:28,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 11:28:28,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 11:28:28,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 11:28:28,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 11:28:28,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 11:28:28,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 11:28:28,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 11:28:28,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 11:28:28,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 11:28:28,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 11:28:28,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 11:28:28,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 11:28:28,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 11:28:28,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 11:28:28,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 11:28:28,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 11:28:28,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 11:28:28,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 11:28:28,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 11:28:28,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 11:28:28,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 11:28:28,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 11:28:28,671 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-08-27 11:28:28,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 11:28:28,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 11:28:28,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 11:28:28,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 11:28:28,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 11:28:28,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 11:28:28,702 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 11:28:28,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 11:28:28,703 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 11:28:28,703 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 11:28:28,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 11:28:28,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 11:28:28,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 11:28:28,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-27 11:28:28,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 11:28:28,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-27 11:28:28,705 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-08-27 11:28:28,705 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 11:28:28,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 11:28:28,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 11:28:28,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-27 11:28:28,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 11:28:28,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 11:28:28,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 11:28:28,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 11:28:28,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 11:28:28,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 11:28:28,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-27 11:28:28,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 11:28:28,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 11:28:28,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-27 11:28:28,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 11:28:28,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 943a72d31eebdcd925e39756b65615d2a6fd2676 [2021-08-27 11:28:28,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 11:28:29,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 11:28:29,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 11:28:29,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 11:28:29,017 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 11:28:29,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i [2021-08-27 11:28:29,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d564271cd/6a0cf8326cd041a6a004a0176c8c3be0/FLAG7503af71c [2021-08-27 11:28:29,378 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 11:28:29,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i [2021-08-27 11:28:29,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d564271cd/6a0cf8326cd041a6a004a0176c8c3be0/FLAG7503af71c [2021-08-27 11:28:29,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d564271cd/6a0cf8326cd041a6a004a0176c8c3be0 [2021-08-27 11:28:29,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 11:28:29,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 11:28:29,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 11:28:29,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 11:28:29,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 11:28:29,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:29,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c85495b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29, skipping insertion in model container [2021-08-27 11:28:29,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:29,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 11:28:29,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 11:28:29,966 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i[873,886] [2021-08-27 11:28:29,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 11:28:29,978 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 11:28:29,986 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark01_conjunctive.i[873,886] [2021-08-27 11:28:29,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 11:28:29,997 INFO L208 MainTranslator]: Completed translation [2021-08-27 11:28:29,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29 WrapperNode [2021-08-27 11:28:29,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 11:28:29,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 11:28:29,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 11:28:29,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 11:28:30,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 11:28:30,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 11:28:30,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 11:28:30,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 11:28:30,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 11:28:30,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 11:28:30,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 11:28:30,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 11:28:30,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (1/1) ... [2021-08-27 11:28:30,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 11:28:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:30,126 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) [2021-08-27 11:28:30,128 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 [2021-08-27 11:28:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 11:28:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 11:28:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 11:28:30,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 11:28:30,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 11:28:30,267 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-27 11:28:30,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 11:28:30 BoogieIcfgContainer [2021-08-27 11:28:30,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 11:28:30,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 11:28:30,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 11:28:30,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 11:28:30,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 11:28:29" (1/3) ... [2021-08-27 11:28:30,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12874853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 11:28:30, skipping insertion in model container [2021-08-27 11:28:30,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:28:29" (2/3) ... [2021-08-27 11:28:30,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12874853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 11:28:30, skipping insertion in model container [2021-08-27 11:28:30,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 11:28:30" (3/3) ... [2021-08-27 11:28:30,273 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark01_conjunctive.i [2021-08-27 11:28:30,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 11:28:30,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-27 11:28:30,313 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 11:28:30,316 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 11:28:30,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-27 11:28:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-27 11:28:30,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:30,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-27 11:28:30,327 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 28695973, now seen corresponding path program 1 times [2021-08-27 11:28:30,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:30,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911209120] [2021-08-27 11:28:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:30,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:30,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:30,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911209120] [2021-08-27 11:28:30,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911209120] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:28:30,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:28:30,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 11:28:30,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226958901] [2021-08-27 11:28:30,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 11:28:30,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:30,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 11:28:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:28:30,485 INFO L87 Difference]: Start difference. First operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:30,542 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-08-27 11:28:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 11:28:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-08-27 11:28:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:30,554 INFO L225 Difference]: With dead ends: 30 [2021-08-27 11:28:30,554 INFO L226 Difference]: Without dead ends: 11 [2021-08-27 11:28:30,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:28:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-08-27 11:28:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-08-27 11:28:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-08-27 11:28:30,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2021-08-27 11:28:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:30,584 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-08-27 11:28:30,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-08-27 11:28:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-27 11:28:30,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:30,585 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-27 11:28:30,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 11:28:30,598 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash 889575213, now seen corresponding path program 1 times [2021-08-27 11:28:30,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:30,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439463582] [2021-08-27 11:28:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:30,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:30,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:30,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439463582] [2021-08-27 11:28:30,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439463582] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:28:30,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:28:30,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 11:28:30,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448192414] [2021-08-27 11:28:30,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 11:28:30,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:30,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 11:28:30,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:28:30,632 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:30,640 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-08-27 11:28:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 11:28:30,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-27 11:28:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:30,642 INFO L225 Difference]: With dead ends: 10 [2021-08-27 11:28:30,642 INFO L226 Difference]: Without dead ends: 9 [2021-08-27 11:28:30,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:28:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-27 11:28:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-27 11:28:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-08-27 11:28:30,646 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-08-27 11:28:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:30,646 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-08-27 11:28:30,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,647 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-08-27 11:28:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 11:28:30,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:30,648 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-08-27 11:28:30,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 11:28:30,648 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash 183289263, now seen corresponding path program 1 times [2021-08-27 11:28:30,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:30,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844573212] [2021-08-27 11:28:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:30,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:30,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:30,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844573212] [2021-08-27 11:28:30,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844573212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:30,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396018750] [2021-08-27 11:28:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:30,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:30,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:30,720 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) [2021-08-27 11:28:30,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 11:28:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:30,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 11:28:30,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:30,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396018750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:30,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:30,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-27 11:28:30,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354466031] [2021-08-27 11:28:30,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 11:28:30,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 11:28:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-27 11:28:30,927 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:30,960 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-08-27 11:28:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 11:28:30,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-27 11:28:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:30,962 INFO L225 Difference]: With dead ends: 14 [2021-08-27 11:28:30,962 INFO L226 Difference]: Without dead ends: 13 [2021-08-27 11:28:30,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-08-27 11:28:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-27 11:28:30,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-08-27 11:28:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-08-27 11:28:30,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2021-08-27 11:28:30,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:30,967 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-08-27 11:28:30,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-08-27 11:28:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 11:28:30,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:30,968 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2021-08-27 11:28:30,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:31,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:31,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:31,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1467050341, now seen corresponding path program 2 times [2021-08-27 11:28:31,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:31,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36972200] [2021-08-27 11:28:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:31,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:31,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:31,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36972200] [2021-08-27 11:28:31,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36972200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:31,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968438083] [2021-08-27 11:28:31,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 11:28:31,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:31,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:31,228 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) [2021-08-27 11:28:31,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 11:28:31,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 11:28:31,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:31,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 11:28:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:31,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968438083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:31,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:31,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-27 11:28:31,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800406828] [2021-08-27 11:28:31,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 11:28:31,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 11:28:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-27 11:28:31,356 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:31,378 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-08-27 11:28:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 11:28:31,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-27 11:28:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:31,379 INFO L225 Difference]: With dead ends: 17 [2021-08-27 11:28:31,380 INFO L226 Difference]: Without dead ends: 16 [2021-08-27 11:28:31,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-27 11:28:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-27 11:28:31,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-08-27 11:28:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-08-27 11:28:31,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2021-08-27 11:28:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:31,382 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-08-27 11:28:31,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-08-27 11:28:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 11:28:31,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:31,383 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2021-08-27 11:28:31,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:31,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-27 11:28:31,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash -690445841, now seen corresponding path program 3 times [2021-08-27 11:28:31,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:31,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381501667] [2021-08-27 11:28:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:31,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:31,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:31,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381501667] [2021-08-27 11:28:31,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381501667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:31,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102146405] [2021-08-27 11:28:31,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 11:28:31,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:31,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:31,637 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) [2021-08-27 11:28:31,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 11:28:31,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 11:28:31,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 11:28:31,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:31,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102146405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:31,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:31,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-27 11:28:31,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459692244] [2021-08-27 11:28:31,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 11:28:31,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:31,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 11:28:31,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-27 11:28:31,776 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:31,800 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-08-27 11:28:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 11:28:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-27 11:28:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:31,800 INFO L225 Difference]: With dead ends: 20 [2021-08-27 11:28:31,801 INFO L226 Difference]: Without dead ends: 19 [2021-08-27 11:28:31,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-27 11:28:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-27 11:28:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-08-27 11:28:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-08-27 11:28:31,803 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2021-08-27 11:28:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:31,803 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-08-27 11:28:31,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-08-27 11:28:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 11:28:31,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:31,804 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2021-08-27 11:28:31,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-27 11:28:32,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:32,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:32,032 INFO L82 PathProgramCache]: Analyzing trace with hash -473619163, now seen corresponding path program 4 times [2021-08-27 11:28:32,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:32,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157088378] [2021-08-27 11:28:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:32,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:32,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:32,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157088378] [2021-08-27 11:28:32,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157088378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:32,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302763778] [2021-08-27 11:28:32,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 11:28:32,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:32,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:32,129 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) [2021-08-27 11:28:32,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 11:28:32,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 11:28:32,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:32,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 11:28:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:32,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302763778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:32,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:32,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-27 11:28:32,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133369224] [2021-08-27 11:28:32,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 11:28:32,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:32,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 11:28:32,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-27 11:28:32,300 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:32,327 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-08-27 11:28:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 11:28:32,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-27 11:28:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:32,328 INFO L225 Difference]: With dead ends: 23 [2021-08-27 11:28:32,328 INFO L226 Difference]: Without dead ends: 22 [2021-08-27 11:28:32,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-27 11:28:32,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-27 11:28:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-08-27 11:28:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-08-27 11:28:32,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2021-08-27 11:28:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:32,331 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-08-27 11:28:32,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-08-27 11:28:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 11:28:32,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:32,331 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1] [2021-08-27 11:28:32,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:32,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:32,547 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash -620868049, now seen corresponding path program 5 times [2021-08-27 11:28:32,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:32,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116666228] [2021-08-27 11:28:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:32,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:32,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:32,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116666228] [2021-08-27 11:28:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116666228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:32,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664381687] [2021-08-27 11:28:32,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 11:28:32,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:32,605 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) [2021-08-27 11:28:32,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 11:28:32,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-27 11:28:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 11:28:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:32,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664381687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:32,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:32,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-27 11:28:32,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517305584] [2021-08-27 11:28:32,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 11:28:32,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 11:28:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-27 11:28:32,851 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:32,879 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-08-27 11:28:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 11:28:32,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-27 11:28:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:32,880 INFO L225 Difference]: With dead ends: 26 [2021-08-27 11:28:32,881 INFO L226 Difference]: Without dead ends: 25 [2021-08-27 11:28:32,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-27 11:28:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-27 11:28:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-08-27 11:28:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-08-27 11:28:32,883 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2021-08-27 11:28:32,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:32,884 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-08-27 11:28:32,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-08-27 11:28:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 11:28:32,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:32,884 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1] [2021-08-27 11:28:32,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-27 11:28:33,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:33,101 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2144145637, now seen corresponding path program 6 times [2021-08-27 11:28:33,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:33,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521356052] [2021-08-27 11:28:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:33,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:33,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521356052] [2021-08-27 11:28:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521356052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114596536] [2021-08-27 11:28:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 11:28:33,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:33,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:33,171 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) [2021-08-27 11:28:33,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 11:28:33,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-27 11:28:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:33,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-27 11:28:33,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:33,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114596536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:33,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:33,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-27 11:28:33,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769402530] [2021-08-27 11:28:33,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 11:28:33,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 11:28:33,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-08-27 11:28:33,439 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:33,470 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-08-27 11:28:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 11:28:33,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-27 11:28:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:33,471 INFO L225 Difference]: With dead ends: 29 [2021-08-27 11:28:33,471 INFO L226 Difference]: Without dead ends: 28 [2021-08-27 11:28:33,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-08-27 11:28:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-27 11:28:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-08-27 11:28:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-08-27 11:28:33,474 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2021-08-27 11:28:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:33,474 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-08-27 11:28:33,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-08-27 11:28:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 11:28:33,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:33,475 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1] [2021-08-27 11:28:33,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-27 11:28:33,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:33,691 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:33,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1489095279, now seen corresponding path program 7 times [2021-08-27 11:28:33,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:33,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416003513] [2021-08-27 11:28:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:33,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:33,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:33,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416003513] [2021-08-27 11:28:33,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416003513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:33,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28409619] [2021-08-27 11:28:33,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 11:28:33,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:33,785 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) [2021-08-27 11:28:33,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 11:28:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 11:28:33,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:34,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28409619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:34,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:34,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-27 11:28:34,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290060766] [2021-08-27 11:28:34,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 11:28:34,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 11:28:34,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-08-27 11:28:34,095 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:34,131 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-08-27 11:28:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 11:28:34,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-27 11:28:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:34,132 INFO L225 Difference]: With dead ends: 32 [2021-08-27 11:28:34,132 INFO L226 Difference]: Without dead ends: 31 [2021-08-27 11:28:34,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-08-27 11:28:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-27 11:28:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-08-27 11:28:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-08-27 11:28:34,135 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2021-08-27 11:28:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:34,135 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-08-27 11:28:34,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-08-27 11:28:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-27 11:28:34,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:34,136 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1] [2021-08-27 11:28:34,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:34,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:34,352 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1079694171, now seen corresponding path program 8 times [2021-08-27 11:28:34,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:34,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028191537] [2021-08-27 11:28:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:34,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:34,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:34,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028191537] [2021-08-27 11:28:34,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028191537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:34,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807189441] [2021-08-27 11:28:34,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 11:28:34,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:34,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:34,441 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) [2021-08-27 11:28:34,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 11:28:34,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 11:28:34,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-27 11:28:34,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:34,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807189441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:34,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:34,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-27 11:28:34,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383812347] [2021-08-27 11:28:34,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 11:28:34,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 11:28:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-08-27 11:28:34,798 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:34,836 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-08-27 11:28:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 11:28:34,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-27 11:28:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:34,837 INFO L225 Difference]: With dead ends: 35 [2021-08-27 11:28:34,837 INFO L226 Difference]: Without dead ends: 34 [2021-08-27 11:28:34,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=166, Invalid=254, Unknown=0, NotChecked=0, Total=420 [2021-08-27 11:28:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-27 11:28:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-08-27 11:28:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-08-27 11:28:34,840 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2021-08-27 11:28:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:34,840 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-08-27 11:28:34,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-08-27 11:28:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 11:28:34,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:34,841 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1] [2021-08-27 11:28:34,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:35,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-27 11:28:35,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash -158918993, now seen corresponding path program 9 times [2021-08-27 11:28:35,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:35,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725027512] [2021-08-27 11:28:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:35,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:35,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:35,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725027512] [2021-08-27 11:28:35,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725027512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:35,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784685136] [2021-08-27 11:28:35,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 11:28:35,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:35,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:35,156 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) [2021-08-27 11:28:35,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 11:28:35,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-27 11:28:35,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:35,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-27 11:28:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:35,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784685136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:35,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:35,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-27 11:28:35,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461713499] [2021-08-27 11:28:35,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 11:28:35,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 11:28:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-08-27 11:28:35,584 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:35,643 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-08-27 11:28:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 11:28:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-27 11:28:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:35,644 INFO L225 Difference]: With dead ends: 38 [2021-08-27 11:28:35,644 INFO L226 Difference]: Without dead ends: 37 [2021-08-27 11:28:35,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2021-08-27 11:28:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-27 11:28:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-08-27 11:28:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-08-27 11:28:35,654 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2021-08-27 11:28:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:35,654 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-08-27 11:28:35,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-08-27 11:28:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 11:28:35,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:35,656 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1] [2021-08-27 11:28:35,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:35,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:35,869 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:35,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:35,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1301710747, now seen corresponding path program 10 times [2021-08-27 11:28:35,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:35,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259504663] [2021-08-27 11:28:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:35,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:35,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:35,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259504663] [2021-08-27 11:28:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259504663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:35,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326217433] [2021-08-27 11:28:35,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 11:28:36,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:36,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:36,005 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) [2021-08-27 11:28:36,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 11:28:36,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 11:28:36,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-27 11:28:36,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:36,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326217433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:36,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:36,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-08-27 11:28:36,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643867974] [2021-08-27 11:28:36,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 11:28:36,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:36,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 11:28:36,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-08-27 11:28:36,463 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:36,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:36,500 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-08-27 11:28:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 11:28:36,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-27 11:28:36,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:36,501 INFO L225 Difference]: With dead ends: 41 [2021-08-27 11:28:36,501 INFO L226 Difference]: Without dead ends: 40 [2021-08-27 11:28:36,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=235, Invalid=365, Unknown=0, NotChecked=0, Total=600 [2021-08-27 11:28:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-27 11:28:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-08-27 11:28:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-08-27 11:28:36,504 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2021-08-27 11:28:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:36,504 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-08-27 11:28:36,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-08-27 11:28:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 11:28:36,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:36,505 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1] [2021-08-27 11:28:36,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-27 11:28:36,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-27 11:28:36,719 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash -5098769, now seen corresponding path program 11 times [2021-08-27 11:28:36,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:36,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574302406] [2021-08-27 11:28:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:36,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:36,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:36,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574302406] [2021-08-27 11:28:36,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574302406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:36,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614129115] [2021-08-27 11:28:36,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 11:28:36,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:36,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:36,841 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) [2021-08-27 11:28:36,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 11:28:37,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-27 11:28:37,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:37,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-27 11:28:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:37,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614129115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:37,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:37,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-27 11:28:37,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603000232] [2021-08-27 11:28:37,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-27 11:28:37,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:37,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-27 11:28:37,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-08-27 11:28:37,392 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:37,440 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-08-27 11:28:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 11:28:37,440 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-27 11:28:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:37,441 INFO L225 Difference]: With dead ends: 44 [2021-08-27 11:28:37,441 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 11:28:37,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=274, Invalid=428, Unknown=0, NotChecked=0, Total=702 [2021-08-27 11:28:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 11:28:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-08-27 11:28:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-08-27 11:28:37,443 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2021-08-27 11:28:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:37,444 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-08-27 11:28:37,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-08-27 11:28:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 11:28:37,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:37,445 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1] [2021-08-27 11:28:37,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:37,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-27 11:28:37,662 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:37,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1573522395, now seen corresponding path program 12 times [2021-08-27 11:28:37,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:37,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112139979] [2021-08-27 11:28:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:37,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:37,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:37,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112139979] [2021-08-27 11:28:37,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112139979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:37,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948640300] [2021-08-27 11:28:37,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 11:28:37,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:37,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:37,839 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) [2021-08-27 11:28:37,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 11:28:38,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-27 11:28:38,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:38,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-27 11:28:38,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:38,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948640300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:38,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:38,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-08-27 11:28:38,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731691761] [2021-08-27 11:28:38,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 11:28:38,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 11:28:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-08-27 11:28:38,409 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 28 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:38,476 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-08-27 11:28:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 11:28:38,477 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 28 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-27 11:28:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:38,477 INFO L225 Difference]: With dead ends: 47 [2021-08-27 11:28:38,477 INFO L226 Difference]: Without dead ends: 46 [2021-08-27 11:28:38,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=316, Invalid=496, Unknown=0, NotChecked=0, Total=812 [2021-08-27 11:28:38,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-27 11:28:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-08-27 11:28:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-08-27 11:28:38,484 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2021-08-27 11:28:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:38,485 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-08-27 11:28:38,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 28 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-08-27 11:28:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 11:28:38,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:38,485 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1] [2021-08-27 11:28:38,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:38,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-27 11:28:38,686 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1532551377, now seen corresponding path program 13 times [2021-08-27 11:28:38,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:38,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777893164] [2021-08-27 11:28:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:38,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:38,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:38,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777893164] [2021-08-27 11:28:38,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777893164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:38,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600041739] [2021-08-27 11:28:38,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 11:28:38,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:38,848 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) [2021-08-27 11:28:38,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 11:28:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-27 11:28:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:39,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600041739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:39,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:39,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-08-27 11:28:39,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737768752] [2021-08-27 11:28:39,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 11:28:39,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 11:28:39,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=539, Unknown=0, NotChecked=0, Total=870 [2021-08-27 11:28:39,562 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 30 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 30 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:39,609 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-08-27 11:28:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 11:28:39,610 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 30 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-27 11:28:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:39,610 INFO L225 Difference]: With dead ends: 50 [2021-08-27 11:28:39,610 INFO L226 Difference]: Without dead ends: 49 [2021-08-27 11:28:39,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=361, Invalid=569, Unknown=0, NotChecked=0, Total=930 [2021-08-27 11:28:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-27 11:28:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-08-27 11:28:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-08-27 11:28:39,613 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2021-08-27 11:28:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:39,613 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-08-27 11:28:39,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 30 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-08-27 11:28:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 11:28:39,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:39,614 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1] [2021-08-27 11:28:39,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:39,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 11:28:39,831 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:39,831 INFO L82 PathProgramCache]: Analyzing trace with hash -735666203, now seen corresponding path program 14 times [2021-08-27 11:28:39,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:39,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353260494] [2021-08-27 11:28:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:39,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:39,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:39,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353260494] [2021-08-27 11:28:39,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353260494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:39,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249253557] [2021-08-27 11:28:39,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 11:28:39,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:39,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:39,997 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) [2021-08-27 11:28:39,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 11:28:40,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 11:28:40,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:40,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-27 11:28:40,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:40,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249253557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:40,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:40,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-08-27 11:28:40,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398222595] [2021-08-27 11:28:40,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 11:28:40,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:40,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 11:28:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2021-08-27 11:28:40,667 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:40,718 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-08-27 11:28:40,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 11:28:40,718 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-27 11:28:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:40,719 INFO L225 Difference]: With dead ends: 53 [2021-08-27 11:28:40,719 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 11:28:40,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=409, Invalid=647, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 11:28:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 11:28:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-08-27 11:28:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-08-27 11:28:40,724 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2021-08-27 11:28:40,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:40,724 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-08-27 11:28:40,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-08-27 11:28:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 11:28:40,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:40,725 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1] [2021-08-27 11:28:40,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:40,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:40,943 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash 986307439, now seen corresponding path program 15 times [2021-08-27 11:28:40,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:40,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644844939] [2021-08-27 11:28:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:40,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:41,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:41,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644844939] [2021-08-27 11:28:41,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644844939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:41,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903373373] [2021-08-27 11:28:41,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 11:28:41,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:41,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:41,116 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:41,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 11:28:41,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-27 11:28:41,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:41,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-27 11:28:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:41,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903373373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:41,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:41,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-08-27 11:28:41,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085143380] [2021-08-27 11:28:41,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-27 11:28:41,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-27 11:28:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-08-27 11:28:41,900 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 34 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 34 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:41,985 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-08-27 11:28:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 11:28:41,986 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 34 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-27 11:28:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:41,986 INFO L225 Difference]: With dead ends: 56 [2021-08-27 11:28:41,986 INFO L226 Difference]: Without dead ends: 55 [2021-08-27 11:28:41,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=460, Invalid=730, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 11:28:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-27 11:28:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-08-27 11:28:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-08-27 11:28:41,989 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 50 [2021-08-27 11:28:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:41,989 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-08-27 11:28:41,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 34 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-08-27 11:28:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-27 11:28:41,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:41,990 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1] [2021-08-27 11:28:42,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:42,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 11:28:42,208 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:42,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1213692837, now seen corresponding path program 16 times [2021-08-27 11:28:42,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:42,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540981905] [2021-08-27 11:28:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:42,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:42,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:42,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540981905] [2021-08-27 11:28:42,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540981905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:42,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206403364] [2021-08-27 11:28:42,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 11:28:42,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:42,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:42,410 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:42,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 11:28:42,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 11:28:42,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:42,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 11:28:42,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:43,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206403364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:43,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:43,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-08-27 11:28:43,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054893191] [2021-08-27 11:28:43,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 11:28:43,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:43,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 11:28:43,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 11:28:43,229 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:43,292 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-08-27 11:28:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 11:28:43,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-27 11:28:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:43,293 INFO L225 Difference]: With dead ends: 59 [2021-08-27 11:28:43,293 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 11:28:43,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=514, Invalid=818, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 11:28:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 11:28:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-08-27 11:28:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-08-27 11:28:43,296 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 53 [2021-08-27 11:28:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:43,296 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-08-27 11:28:43,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-08-27 11:28:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 11:28:43,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:43,301 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1] [2021-08-27 11:28:43,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:43,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 11:28:43,519 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2088658863, now seen corresponding path program 17 times [2021-08-27 11:28:43,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:43,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12763789] [2021-08-27 11:28:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:43,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:43,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:43,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12763789] [2021-08-27 11:28:43,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12763789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:43,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192394040] [2021-08-27 11:28:43,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 11:28:43,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:43,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:43,744 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:43,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 11:28:44,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-27 11:28:44,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:44,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-27 11:28:44,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:44,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192394040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:44,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:44,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-08-27 11:28:44,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568438102] [2021-08-27 11:28:44,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 11:28:44,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 11:28:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=873, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 11:28:44,623 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 38 states, 37 states have (on average 2.972972972972973) internal successors, (110), 38 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:44,684 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-08-27 11:28:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 11:28:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.972972972972973) internal successors, (110), 38 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-27 11:28:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:44,685 INFO L225 Difference]: With dead ends: 62 [2021-08-27 11:28:44,685 INFO L226 Difference]: Without dead ends: 61 [2021-08-27 11:28:44,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=571, Invalid=911, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 11:28:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-27 11:28:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-08-27 11:28:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-08-27 11:28:44,689 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 56 [2021-08-27 11:28:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:44,689 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-08-27 11:28:44,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.972972972972973) internal successors, (110), 38 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-08-27 11:28:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-27 11:28:44,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:44,690 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1] [2021-08-27 11:28:44,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:44,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:44,909 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2045020005, now seen corresponding path program 18 times [2021-08-27 11:28:44,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:44,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157406283] [2021-08-27 11:28:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:44,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:45,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:45,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157406283] [2021-08-27 11:28:45,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157406283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:45,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866699064] [2021-08-27 11:28:45,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 11:28:45,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:45,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:45,144 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:45,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 11:28:45,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-08-27 11:28:45,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:45,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-27 11:28:45,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:46,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866699064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:46,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:46,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2021-08-27 11:28:46,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670320181] [2021-08-27 11:28:46,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 11:28:46,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 11:28:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 11:28:46,144 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 40 states, 39 states have (on average 2.9743589743589745) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:46,206 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-08-27 11:28:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 11:28:46,207 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.9743589743589745) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-27 11:28:46,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:46,207 INFO L225 Difference]: With dead ends: 65 [2021-08-27 11:28:46,207 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 11:28:46,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=631, Invalid=1009, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 11:28:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 11:28:46,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-08-27 11:28:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-08-27 11:28:46,218 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 59 [2021-08-27 11:28:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:46,218 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-08-27 11:28:46,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.9743589743589745) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-08-27 11:28:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-27 11:28:46,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:46,220 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1] [2021-08-27 11:28:46,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:46,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:46,438 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash -920075281, now seen corresponding path program 19 times [2021-08-27 11:28:46,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:46,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757450906] [2021-08-27 11:28:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:46,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:46,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:46,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757450906] [2021-08-27 11:28:46,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757450906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:46,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443111198] [2021-08-27 11:28:46,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 11:28:46,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:46,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:46,697 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:46,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 11:28:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-27 11:28:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:47,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443111198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:47,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:47,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2021-08-27 11:28:47,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627083595] [2021-08-27 11:28:47,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-27 11:28:47,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:47,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-27 11:28:47,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=1070, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 11:28:47,766 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 42 states, 41 states have (on average 2.975609756097561) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:47,829 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-08-27 11:28:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-27 11:28:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.975609756097561) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-27 11:28:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:47,830 INFO L225 Difference]: With dead ends: 68 [2021-08-27 11:28:47,830 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 11:28:47,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=694, Invalid=1112, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 11:28:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 11:28:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-08-27 11:28:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-08-27 11:28:47,833 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 62 [2021-08-27 11:28:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:47,833 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-08-27 11:28:47,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.975609756097561) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-08-27 11:28:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-27 11:28:47,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:47,834 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1] [2021-08-27 11:28:47,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:48,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:48,046 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:48,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:48,047 INFO L82 PathProgramCache]: Analyzing trace with hash 518636325, now seen corresponding path program 20 times [2021-08-27 11:28:48,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:48,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852512071] [2021-08-27 11:28:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:48,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:48,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:48,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852512071] [2021-08-27 11:28:48,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852512071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:48,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598167322] [2021-08-27 11:28:48,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 11:28:48,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:48,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:48,324 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:48,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 11:28:48,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 11:28:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 11:28:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:49,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598167322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:49,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:49,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2021-08-27 11:28:49,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298990214] [2021-08-27 11:28:49,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-27 11:28:49,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:49,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-27 11:28:49,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=1176, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 11:28:49,405 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 44 states, 43 states have (on average 2.9767441860465116) internal successors, (128), 44 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:49,466 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-08-27 11:28:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 11:28:49,468 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.9767441860465116) internal successors, (128), 44 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-27 11:28:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:49,468 INFO L225 Difference]: With dead ends: 71 [2021-08-27 11:28:49,468 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 11:28:49,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=760, Invalid=1220, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 11:28:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 11:28:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-08-27 11:28:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-08-27 11:28:49,471 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 65 [2021-08-27 11:28:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:49,471 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-08-27 11:28:49,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.9767441860465116) internal successors, (128), 44 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:49,471 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-08-27 11:28:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-27 11:28:49,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:49,472 INFO L512 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1] [2021-08-27 11:28:49,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:49,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-27 11:28:49,690 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1697443887, now seen corresponding path program 21 times [2021-08-27 11:28:49,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:49,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964260677] [2021-08-27 11:28:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:49,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:49,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:49,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964260677] [2021-08-27 11:28:49,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964260677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:49,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944790378] [2021-08-27 11:28:49,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 11:28:49,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:49,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:49,981 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:49,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 11:28:50,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-08-27 11:28:50,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 11:28:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:51,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944790378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:51,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:51,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-08-27 11:28:51,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622375651] [2021-08-27 11:28:51,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-27 11:28:51,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-27 11:28:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-08-27 11:28:51,151 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:51,214 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-08-27 11:28:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 11:28:51,214 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-08-27 11:28:51,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:51,215 INFO L225 Difference]: With dead ends: 74 [2021-08-27 11:28:51,215 INFO L226 Difference]: Without dead ends: 73 [2021-08-27 11:28:51,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 469.8ms TimeCoverageRelationStatistics Valid=829, Invalid=1333, Unknown=0, NotChecked=0, Total=2162 [2021-08-27 11:28:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-27 11:28:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-08-27 11:28:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-08-27 11:28:51,217 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 68 [2021-08-27 11:28:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:51,217 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-08-27 11:28:51,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-08-27 11:28:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-27 11:28:51,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:51,218 INFO L512 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1] [2021-08-27 11:28:51,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:51,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-27 11:28:51,435 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:51,435 INFO L82 PathProgramCache]: Analyzing trace with hash -394055963, now seen corresponding path program 22 times [2021-08-27 11:28:51,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:51,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964277627] [2021-08-27 11:28:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:51,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:51,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:51,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964277627] [2021-08-27 11:28:51,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964277627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:51,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20404481] [2021-08-27 11:28:51,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 11:28:51,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:51,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:51,729 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:51,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 11:28:52,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 11:28:52,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:52,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-27 11:28:52,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:52,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20404481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:52,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:52,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-08-27 11:28:52,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330392659] [2021-08-27 11:28:52,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-27 11:28:52,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-27 11:28:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 11:28:52,933 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 48 states, 47 states have (on average 2.978723404255319) internal successors, (140), 48 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:52,995 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-08-27 11:28:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 11:28:52,996 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.978723404255319) internal successors, (140), 48 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-08-27 11:28:52,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:52,996 INFO L225 Difference]: With dead ends: 77 [2021-08-27 11:28:52,996 INFO L226 Difference]: Without dead ends: 76 [2021-08-27 11:28:52,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=901, Invalid=1451, Unknown=0, NotChecked=0, Total=2352 [2021-08-27 11:28:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-27 11:28:52,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-08-27 11:28:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-08-27 11:28:52,999 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 71 [2021-08-27 11:28:52,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:52,999 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-08-27 11:28:52,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.978723404255319) internal successors, (140), 48 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-08-27 11:28:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-27 11:28:53,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:53,000 INFO L512 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1] [2021-08-27 11:28:53,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:53,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:53,218 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1175524241, now seen corresponding path program 23 times [2021-08-27 11:28:53,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:53,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833058226] [2021-08-27 11:28:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:53,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:53,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:53,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833058226] [2021-08-27 11:28:53,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833058226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:53,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579914170] [2021-08-27 11:28:53,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 11:28:53,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:53,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:53,544 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:53,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 11:28:54,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-08-27 11:28:54,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:54,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-27 11:28:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:54,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579914170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:54,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:54,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-08-27 11:28:54,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483941506] [2021-08-27 11:28:54,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-27 11:28:54,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-27 11:28:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=1524, Unknown=0, NotChecked=0, Total=2450 [2021-08-27 11:28:54,882 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 50 states, 49 states have (on average 2.979591836734694) internal successors, (146), 50 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:54,951 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-08-27 11:28:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 11:28:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.979591836734694) internal successors, (146), 50 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-08-27 11:28:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:54,952 INFO L225 Difference]: With dead ends: 80 [2021-08-27 11:28:54,952 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 11:28:54,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=976, Invalid=1574, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 11:28:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 11:28:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-08-27 11:28:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-08-27 11:28:54,954 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 74 [2021-08-27 11:28:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:54,955 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-08-27 11:28:54,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.979591836734694) internal successors, (146), 50 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-08-27 11:28:54,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-27 11:28:54,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:54,955 INFO L512 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1] [2021-08-27 11:28:54,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-27 11:28:55,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:55,174 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1120717477, now seen corresponding path program 24 times [2021-08-27 11:28:55,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:55,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161115287] [2021-08-27 11:28:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:55,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:55,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:55,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161115287] [2021-08-27 11:28:55,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161115287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:55,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928880009] [2021-08-27 11:28:55,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 11:28:55,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:55,537 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:55,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 11:28:56,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-08-27 11:28:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:28:56,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-27 11:28:56,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:57,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928880009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:57,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:57,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2021-08-27 11:28:57,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808074249] [2021-08-27 11:28:57,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 11:28:57,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:57,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 11:28:57,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 11:28:57,043 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 52 states, 51 states have (on average 2.980392156862745) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:57,116 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-08-27 11:28:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 11:28:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.980392156862745) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-08-27 11:28:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:57,117 INFO L225 Difference]: With dead ends: 83 [2021-08-27 11:28:57,117 INFO L226 Difference]: Without dead ends: 82 [2021-08-27 11:28:57,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 655.8ms TimeCoverageRelationStatistics Valid=1054, Invalid=1702, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 11:28:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-27 11:28:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-08-27 11:28:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-08-27 11:28:57,120 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 77 [2021-08-27 11:28:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:57,120 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-08-27 11:28:57,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.980392156862745) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-08-27 11:28:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-27 11:28:57,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:57,121 INFO L512 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1] [2021-08-27 11:28:57,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:57,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-27 11:28:57,340 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1781352273, now seen corresponding path program 25 times [2021-08-27 11:28:57,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:57,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961243489] [2021-08-27 11:28:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:57,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:57,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:57,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961243489] [2021-08-27 11:28:57,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961243489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:57,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929630680] [2021-08-27 11:28:57,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 11:28:57,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:57,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:57,708 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:57,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 11:28:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-27 11:28:58,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:28:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:59,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929630680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:59,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:28:59,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2021-08-27 11:28:59,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131051432] [2021-08-27 11:28:59,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-27 11:28:59,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:28:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-27 11:28:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1781, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 11:28:59,193 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 54 states, 53 states have (on average 2.981132075471698) internal successors, (158), 54 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:28:59,282 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-08-27 11:28:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 11:28:59,282 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.981132075471698) internal successors, (158), 54 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-27 11:28:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:28:59,283 INFO L225 Difference]: With dead ends: 86 [2021-08-27 11:28:59,283 INFO L226 Difference]: Without dead ends: 85 [2021-08-27 11:28:59,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 651.0ms TimeCoverageRelationStatistics Valid=1135, Invalid=1835, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 11:28:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-27 11:28:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-08-27 11:28:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-08-27 11:28:59,286 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 80 [2021-08-27 11:28:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:28:59,286 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-08-27 11:28:59,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.981132075471698) internal successors, (158), 54 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:28:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-08-27 11:28:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-27 11:28:59,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:28:59,286 INFO L512 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1] [2021-08-27 11:28:59,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-27 11:28:59,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 11:28:59,503 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:28:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:28:59,503 INFO L82 PathProgramCache]: Analyzing trace with hash 350393957, now seen corresponding path program 26 times [2021-08-27 11:28:59,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:28:59,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449014784] [2021-08-27 11:28:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:28:59,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:28:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:28:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:28:59,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:28:59,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449014784] [2021-08-27 11:28:59,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449014784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:28:59,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457550520] [2021-08-27 11:28:59,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 11:28:59,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:28:59,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:28:59,897 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:28:59,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-27 11:29:00,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 11:29:00,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:29:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-27 11:29:00,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:29:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:29:01,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457550520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:29:01,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:29:01,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2021-08-27 11:29:01,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871585091] [2021-08-27 11:29:01,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-27 11:29:01,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:29:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-27 11:29:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 11:29:01,440 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 56 states, 55 states have (on average 2.981818181818182) internal successors, (164), 56 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:29:01,521 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-08-27 11:29:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-27 11:29:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.981818181818182) internal successors, (164), 56 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-08-27 11:29:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:29:01,522 INFO L225 Difference]: With dead ends: 89 [2021-08-27 11:29:01,522 INFO L226 Difference]: Without dead ends: 88 [2021-08-27 11:29:01,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 701.3ms TimeCoverageRelationStatistics Valid=1219, Invalid=1973, Unknown=0, NotChecked=0, Total=3192 [2021-08-27 11:29:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-27 11:29:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-27 11:29:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-08-27 11:29:01,525 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 83 [2021-08-27 11:29:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:29:01,525 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-08-27 11:29:01,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.981818181818182) internal successors, (164), 56 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-08-27 11:29:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-27 11:29:01,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:29:01,526 INFO L512 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1] [2021-08-27 11:29:01,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-27 11:29:01,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-27 11:29:01,745 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:29:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:29:01,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1815893231, now seen corresponding path program 27 times [2021-08-27 11:29:01,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:29:01,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158686043] [2021-08-27 11:29:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:29:01,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:29:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:29:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:29:02,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:29:02,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158686043] [2021-08-27 11:29:02,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158686043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:29:02,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967806787] [2021-08-27 11:29:02,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 11:29:02,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:29:02,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:29:02,197 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:29:02,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-27 11:29:03,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-08-27 11:29:03,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:29:03,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-27 11:29:03,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:29:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:29:04,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967806787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:29:04,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:29:04,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2021-08-27 11:29:04,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690586707] [2021-08-27 11:29:04,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-27 11:29:04,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:29:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-27 11:29:04,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2021-08-27 11:29:04,103 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 58 states, 57 states have (on average 2.982456140350877) internal successors, (170), 58 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:04,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:29:04,205 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-08-27 11:29:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 11:29:04,206 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.982456140350877) internal successors, (170), 58 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-27 11:29:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:29:04,208 INFO L225 Difference]: With dead ends: 92 [2021-08-27 11:29:04,208 INFO L226 Difference]: Without dead ends: 91 [2021-08-27 11:29:04,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=1306, Invalid=2116, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 11:29:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-27 11:29:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-08-27 11:29:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-08-27 11:29:04,224 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 86 [2021-08-27 11:29:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:29:04,224 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-08-27 11:29:04,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.982456140350877) internal successors, (170), 58 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-08-27 11:29:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-27 11:29:04,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:29:04,225 INFO L512 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1] [2021-08-27 11:29:04,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-27 11:29:04,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 11:29:04,426 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:29:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:29:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2132766171, now seen corresponding path program 28 times [2021-08-27 11:29:04,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:29:04,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849045231] [2021-08-27 11:29:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:29:04,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:29:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:29:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:29:05,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:29:05,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849045231] [2021-08-27 11:29:05,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849045231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:29:05,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575900027] [2021-08-27 11:29:05,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 11:29:05,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:29:05,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:29:05,010 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:29:05,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-27 11:29:05,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 11:29:05,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:29:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-27 11:29:05,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:29:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:29:06,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575900027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:29:06,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:29:06,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2021-08-27 11:29:06,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169156516] [2021-08-27 11:29:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-27 11:29:06,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:29:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-27 11:29:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 11:29:06,779 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 60 states, 59 states have (on average 2.983050847457627) internal successors, (176), 60 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:29:06,867 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-08-27 11:29:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 11:29:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.983050847457627) internal successors, (176), 60 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-08-27 11:29:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:29:06,868 INFO L225 Difference]: With dead ends: 95 [2021-08-27 11:29:06,868 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 11:29:06,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 892.1ms TimeCoverageRelationStatistics Valid=1396, Invalid=2264, Unknown=0, NotChecked=0, Total=3660 [2021-08-27 11:29:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 11:29:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-08-27 11:29:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:06,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-08-27 11:29:06,871 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 89 [2021-08-27 11:29:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:29:06,871 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-08-27 11:29:06,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.983050847457627) internal successors, (176), 60 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:06,871 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-08-27 11:29:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-27 11:29:06,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:29:06,872 INFO L512 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1] [2021-08-27 11:29:06,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-27 11:29:07,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:29:07,091 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:29:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:29:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1785741009, now seen corresponding path program 29 times [2021-08-27 11:29:07,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:29:07,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598762364] [2021-08-27 11:29:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:29:07,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:29:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:29:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:29:07,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:29:07,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598762364] [2021-08-27 11:29:07,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598762364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:29:07,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516366840] [2021-08-27 11:29:07,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 11:29:07,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:29:07,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:29:07,587 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 11:29:07,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-27 11:29:08,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-08-27 11:29:08,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 11:29:08,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-27 11:29:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 11:29:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:29:09,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516366840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 11:29:09,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 11:29:09,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2021-08-27 11:29:09,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802929597] [2021-08-27 11:29:09,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-27 11:29:09,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:29:09,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-27 11:29:09,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1427, Invalid=2355, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 11:29:09,564 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 62 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 62 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:29:09,651 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-08-27 11:29:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 11:29:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 62 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-08-27 11:29:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:29:09,652 INFO L225 Difference]: With dead ends: 98 [2021-08-27 11:29:09,652 INFO L226 Difference]: Without dead ends: 97 [2021-08-27 11:29:09,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 882.6ms TimeCoverageRelationStatistics Valid=1489, Invalid=2417, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 11:29:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-27 11:29:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-08-27 11:29:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-08-27 11:29:09,655 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 92 [2021-08-27 11:29:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:29:09,655 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-08-27 11:29:09,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 62 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:29:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-08-27 11:29:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-27 11:29:09,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:29:09,656 INFO L512 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1] [2021-08-27 11:29:09,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-27 11:29:09,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 11:29:09,875 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 11:29:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:29:09,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1545421339, now seen corresponding path program 30 times [2021-08-27 11:29:09,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:29:09,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426197086] [2021-08-27 11:29:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:29:09,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:29:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 11:29:09,905 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 11:29:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 11:29:09,968 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 11:29:09,968 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 11:29:09,969 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:29:09,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:29:09,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-27 11:29:09,973 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 11:29:10,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 11:29:10 BoogieIcfgContainer [2021-08-27 11:29:10,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 11:29:10,002 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 11:29:10,002 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 11:29:10,002 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 11:29:10,002 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 11:28:30" (3/4) ... [2021-08-27 11:29:10,003 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 11:29:10,037 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 11:29:10,037 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 11:29:10,038 INFO L168 Benchmark]: Toolchain (without parser) took 40206.17 ms. Allocated memory was 46.1 MB in the beginning and 708.8 MB in the end (delta: 662.7 MB). Free memory was 22.6 MB in the beginning and 519.1 MB in the end (delta: -496.5 MB). Peak memory consumption was 167.0 MB. Max. memory is 16.1 GB. [2021-08-27 11:29:10,038 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory is still 28.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 11:29:10,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.08 ms. Allocated memory was 46.1 MB in the beginning and 60.8 MB in the end (delta: 14.7 MB). Free memory was 22.4 MB in the beginning and 37.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-08-27 11:29:10,039 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.21 ms. Allocated memory is still 60.8 MB. Free memory was 36.8 MB in the beginning and 44.7 MB in the end (delta: -7.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 11:29:10,039 INFO L168 Benchmark]: Boogie Preprocessor took 25.69 ms. Allocated memory is still 60.8 MB. Free memory was 44.7 MB in the beginning and 43.8 MB in the end (delta: 887.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 11:29:10,039 INFO L168 Benchmark]: RCFGBuilder took 182.33 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 32.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 11:29:10,039 INFO L168 Benchmark]: TraceAbstraction took 39731.92 ms. Allocated memory was 60.8 MB in the beginning and 708.8 MB in the end (delta: 648.0 MB). Free memory was 32.0 MB in the beginning and 524.4 MB in the end (delta: -492.4 MB). Peak memory consumption was 154.6 MB. Max. memory is 16.1 GB. [2021-08-27 11:29:10,039 INFO L168 Benchmark]: Witness Printer took 35.24 ms. Allocated memory is still 708.8 MB. Free memory was 524.4 MB in the beginning and 519.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 11:29:10,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory is still 28.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 164.08 ms. Allocated memory was 46.1 MB in the beginning and 60.8 MB in the end (delta: 14.7 MB). Free memory was 22.4 MB in the beginning and 37.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.21 ms. Allocated memory is still 60.8 MB. Free memory was 36.8 MB in the beginning and 44.7 MB in the end (delta: -7.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.69 ms. Allocated memory is still 60.8 MB. Free memory was 44.7 MB in the beginning and 43.8 MB in the end (delta: 887.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 182.33 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 32.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 39731.92 ms. Allocated memory was 60.8 MB in the beginning and 708.8 MB in the end (delta: 648.0 MB). Free memory was 32.0 MB in the beginning and 524.4 MB in the end (delta: -492.4 MB). Peak memory consumption was 154.6 MB. Max. memory is 16.1 GB. * Witness Printer took 35.24 ms. Allocated memory is still 708.8 MB. Free memory was 524.4 MB in the beginning and 519.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 24]: integer overflow possible integer overflow possible We found a FailurePath: [L20] int x = __VERIFIER_nondet_int(); [L21] int y = __VERIFIER_nondet_int(); [L22] COND FALSE !(!(x==1 && y==1)) [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] EXPR x+y [L24] x=x+y [L25] y=x [L23] COND TRUE __VERIFIER_nondet_bool() [L24] x+y - UnprovableResult [Line: 24]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 39660.6ms, OverallIterations: 32, TraceHistogramMax: 31, EmptinessCheckTime: 22.1ms, AutomataDifference: 1824.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 162 SDtfs, 680 SDslu, 859 SDs, 0 SdLazy, 1774 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 989.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1978 GetRequests, 1019 SyntacticMatches, 0 SemanticMatches, 959 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18386 ImplicationChecksByTransitivity, 10122.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=31, InterpolantAutomatonStates: 528, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 118.1ms AutomataMinimizationTime, 31 MinimizatonAttempts, 30 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 210.9ms SsaConstructionTime, 1155.7ms SatisfiabilityAnalysisTime, 19267.2ms InterpolantComputationTime, 3006 NumberOfCodeBlocks, 3006 NumberOfCodeBlocksAsserted, 291 NumberOfCheckSat, 2851 ConstructedInterpolants, 0 QuantifiedInterpolants, 16547 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4176 ConjunctsInSsa, 957 ConjunctsInUnsatCore, 60 InterpolantComputations, 2 PerfectInterpolantSequences, 0/26100 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-27 11:29:10,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...