./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash df3ddc93bc6339292c9158119f1fdb949bb8842d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 19:18:24,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:18:24,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:18:24,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:18:24,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:18:24,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:18:24,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:18:24,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:18:24,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:18:24,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:18:24,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:18:24,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:18:24,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:18:24,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:18:24,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:18:24,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:18:24,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:18:24,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:18:24,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:18:24,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:18:24,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:18:24,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:18:24,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:18:24,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:18:24,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:18:24,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:18:24,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:18:24,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:18:24,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:18:24,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:18:24,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:18:24,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:18:24,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:18:24,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:18:24,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:18:24,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:18:24,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:18:24,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:18:24,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:18:24,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:18:24,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:18:24,582 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 19:18:24,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:18:24,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:18:24,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:18:24,605 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:18:24,605 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:18:24,605 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:18:24,605 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:18:24,605 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:18:24,606 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:18:24,606 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:18:24,606 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:18:24,606 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:18:24,606 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:18:24,606 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:18:24,607 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:18:24,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:18:24,608 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 19:18:24,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:18:24,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:18:24,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:18:24,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:18:24,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:18:24,609 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 19:18:24,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:18:24,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:18:24,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:18:24,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:18:24,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:18:24,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:18:24,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:18:24,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:18:24,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:18:24,610 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:18:24,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:18:24,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:18:24,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:18:24,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:18:24,611 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3ddc93bc6339292c9158119f1fdb949bb8842d [2020-12-09 19:18:24,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:18:24,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:18:24,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:18:24,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:18:24,800 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:18:24,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2020-12-09 19:18:24,849 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/data/be7a018ca/e7572d573a2749dd94f809c39d9d8eea/FLAG39715400e [2020-12-09 19:18:25,215 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:18:25,216 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2020-12-09 19:18:25,220 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/data/be7a018ca/e7572d573a2749dd94f809c39d9d8eea/FLAG39715400e [2020-12-09 19:18:25,231 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/data/be7a018ca/e7572d573a2749dd94f809c39d9d8eea [2020-12-09 19:18:25,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:18:25,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:18:25,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:18:25,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:18:25,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:18:25,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27560849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25, skipping insertion in model container [2020-12-09 19:18:25,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:18:25,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:18:25,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:18:25,369 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:18:25,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:18:25,390 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:18:25,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25 WrapperNode [2020-12-09 19:18:25,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:18:25,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:18:25,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:18:25,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:18:25,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:18:25,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:18:25,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:18:25,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:18:25,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... [2020-12-09 19:18:25,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:18:25,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:18:25,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:18:25,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:18:25,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:18:25,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:18:25,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:18:25,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:18:25,621 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 19:18:25,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:18:25 BoogieIcfgContainer [2020-12-09 19:18:25,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:18:25,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:18:25,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:18:25,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:18:25,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:18:25" (1/3) ... [2020-12-09 19:18:25,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203ddbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:18:25, skipping insertion in model container [2020-12-09 19:18:25,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:18:25" (2/3) ... [2020-12-09 19:18:25,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203ddbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:18:25, skipping insertion in model container [2020-12-09 19:18:25,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:18:25" (3/3) ... [2020-12-09 19:18:25,628 INFO L111 eAbstractionObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a.c [2020-12-09 19:18:25,638 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:18:25,640 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 19:18:25,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 19:18:25,664 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:18:25,665 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:18:25,665 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:18:25,665 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:18:25,665 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:18:25,665 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:18:25,665 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:18:25,665 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:18:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 19:18:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 19:18:25,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:18:25,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 19:18:25,678 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 19:18:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:18:25,682 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2020-12-09 19:18:25,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:18:25,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431411135] [2020-12-09 19:18:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:18:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:18:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:18:25,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431411135] [2020-12-09 19:18:25,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:18:25,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:18:25,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625589588] [2020-12-09 19:18:25,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:18:25,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:18:25,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:18:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:18:25,793 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-09 19:18:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:18:25,822 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-12-09 19:18:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:18:25,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 19:18:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:18:25,829 INFO L225 Difference]: With dead ends: 12 [2020-12-09 19:18:25,829 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 19:18:25,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:18:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 19:18:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 19:18:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 19:18:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-09 19:18:25,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 4 [2020-12-09 19:18:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:18:25,855 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-09 19:18:25,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:18:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-09 19:18:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 19:18:25,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:18:25,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 19:18:25,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:18:25,856 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 19:18:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:18:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash 963339, now seen corresponding path program 1 times [2020-12-09 19:18:25,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:18:25,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997239678] [2020-12-09 19:18:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:18:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:18:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:18:25,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997239678] [2020-12-09 19:18:25,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:18:25,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 19:18:25,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205246816] [2020-12-09 19:18:25,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:18:25,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:18:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:18:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:18:25,876 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-12-09 19:18:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:18:25,907 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2020-12-09 19:18:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:18:25,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 19:18:25,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:18:25,909 INFO L225 Difference]: With dead ends: 15 [2020-12-09 19:18:25,909 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 19:18:25,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:18:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 19:18:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 19:18:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 19:18:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-09 19:18:25,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 4 [2020-12-09 19:18:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:18:25,914 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-09 19:18:25,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:18:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-09 19:18:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 19:18:25,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:18:25,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 19:18:25,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 19:18:25,915 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 19:18:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:18:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash 29869514, now seen corresponding path program 1 times [2020-12-09 19:18:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:18:25,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160243672] [2020-12-09 19:18:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:18:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:18:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:18:25,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160243672] [2020-12-09 19:18:25,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:18:25,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 19:18:25,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094055954] [2020-12-09 19:18:25,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:18:25,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:18:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:18:25,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:18:25,943 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2020-12-09 19:18:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:18:25,962 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2020-12-09 19:18:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:18:25,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 19:18:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:18:25,963 INFO L225 Difference]: With dead ends: 14 [2020-12-09 19:18:25,964 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 19:18:25,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:18:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 19:18:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-09 19:18:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 19:18:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-09 19:18:25,968 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2020-12-09 19:18:25,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:18:25,968 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-09 19:18:25,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:18:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-09 19:18:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 19:18:25,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:18:25,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 19:18:25,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 19:18:25,969 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 19:18:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:18:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash 29863556, now seen corresponding path program 1 times [2020-12-09 19:18:25,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:18:25,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851762146] [2020-12-09 19:18:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:18:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:18:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:18:25,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851762146] [2020-12-09 19:18:25,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:18:25,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:18:25,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305887924] [2020-12-09 19:18:25,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:18:25,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:18:25,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:18:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:18:25,992 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2020-12-09 19:18:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:18:26,006 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-12-09 19:18:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:18:26,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 19:18:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:18:26,007 INFO L225 Difference]: With dead ends: 13 [2020-12-09 19:18:26,007 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 19:18:26,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:18:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 19:18:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 19:18:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 19:18:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-09 19:18:26,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2020-12-09 19:18:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:18:26,016 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-09 19:18:26,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:18:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-09 19:18:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 19:18:26,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:18:26,017 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-09 19:18:26,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 19:18:26,018 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 19:18:26,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:18:26,018 INFO L82 PathProgramCache]: Analyzing trace with hash 784501120, now seen corresponding path program 1 times [2020-12-09 19:18:26,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:18:26,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105967564] [2020-12-09 19:18:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:18:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:18:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:18:26,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105967564] [2020-12-09 19:18:26,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787779724] [2020-12-09 19:18:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:18:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:18:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 19:18:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:18:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:18:26,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:18:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:18:26,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 19:18:26,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 8 [2020-12-09 19:18:26,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313611380] [2020-12-09 19:18:26,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:18:26,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:18:26,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:18:26,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:18:26,150 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2020-12-09 19:18:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:18:26,176 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2020-12-09 19:18:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:18:26,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-09 19:18:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:18:26,176 INFO L225 Difference]: With dead ends: 20 [2020-12-09 19:18:26,176 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 19:18:26,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:18:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 19:18:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 19:18:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 19:18:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 19:18:26,177 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2020-12-09 19:18:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:18:26,177 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 19:18:26,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:18:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 19:18:26,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 19:18:26,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:18:26,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 19:18:26,458 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-12-09 19:18:26,458 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 19:18:26,459 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 19:18:26,460 INFO L262 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-12-09 19:18:26,461 INFO L258 CegarLoopResult]: At program point L17-2(lines 16 22) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648))) [2020-12-09 19:18:26,462 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-12-09 19:18:26,462 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 19:18:26,463 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 19:18:26,463 INFO L262 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-12-09 19:18:26,463 INFO L262 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-12-09 19:18:26,464 INFO L262 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-12-09 19:18:26,464 INFO L262 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-12-09 19:18:26,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:18:26 BoogieIcfgContainer [2020-12-09 19:18:26,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:18:26,507 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:18:26,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:18:26,508 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:18:26,509 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:18:25" (3/4) ... [2020-12-09 19:18:26,517 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 19:18:26,536 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 19:18:26,537 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 19:18:26,537 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 19:18:26,572 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3eee2ff1-201c-4d06-9b96-b4e7e67f4772/bin/utaipan/witness.graphml [2020-12-09 19:18:26,572 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:18:26,573 INFO L168 Benchmark]: Toolchain (without parser) took 1337.72 ms. Allocated memory is still 111.1 MB. Free memory was 74.7 MB in the beginning and 63.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2020-12-09 19:18:26,574 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 111.1 MB. Free memory was 90.8 MB in the beginning and 90.7 MB in the end (delta: 100.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:18:26,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.67 ms. Allocated memory is still 111.1 MB. Free memory was 74.5 MB in the beginning and 88.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:18:26,574 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.10 ms. Allocated memory is still 111.1 MB. Free memory was 88.5 MB in the beginning and 87.5 MB in the end (delta: 983.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:18:26,575 INFO L168 Benchmark]: Boogie Preprocessor took 11.96 ms. Allocated memory is still 111.1 MB. Free memory was 87.0 MB in the beginning and 86.4 MB in the end (delta: 543.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:18:26,575 INFO L168 Benchmark]: RCFGBuilder took 197.99 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 75.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:18:26,576 INFO L168 Benchmark]: TraceAbstraction took 882.32 ms. Allocated memory is still 111.1 MB. Free memory was 75.4 MB in the beginning and 65.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:18:26,576 INFO L168 Benchmark]: Witness Printer took 64.75 ms. Allocated memory is still 111.1 MB. Free memory was 65.8 MB in the beginning and 63.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:18:26,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 111.1 MB. Free memory was 90.8 MB in the beginning and 90.7 MB in the end (delta: 100.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 154.67 ms. Allocated memory is still 111.1 MB. Free memory was 74.5 MB in the beginning and 88.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.10 ms. Allocated memory is still 111.1 MB. Free memory was 88.5 MB in the beginning and 87.5 MB in the end (delta: 983.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.96 ms. Allocated memory is still 111.1 MB. Free memory was 87.0 MB in the beginning and 86.4 MB in the end (delta: 543.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 197.99 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 75.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 882.32 ms. Allocated memory is still 111.1 MB. Free memory was 75.4 MB in the beginning and 65.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. * Witness Printer took 64.75 ms. Allocated memory is still 111.1 MB. Free memory was 65.8 MB in the beginning and 63.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: x <= 2147483647 && 0 <= x + 2147483648 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.7s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 18 SDslu, 0 SDs, 0 SdLazy, 71 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 4 NumberOfFragments, 9 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 19 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 546 SizeOfPredicates, 0 NumberOfNonLiveVariables, 15 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 5/6 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 correct! Received shutdown request...