./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/terminator_02-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/loops/terminator_02-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 314932412eeed441a28cefb8ae3e569787d9db1ef6d3b76281c1ff69eee43f8b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:16:15,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:16:15,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:16:15,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:16:15,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:16:15,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:16:15,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:16:15,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:16:15,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:16:15,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:16:15,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:16:15,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:16:15,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:16:15,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:16:15,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:16:15,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:16:15,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:16:15,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:16:15,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:16:15,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:16:15,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:16:15,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:16:15,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:16:15,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:16:15,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:16:15,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:16:15,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:16:15,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:16:15,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:16:15,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:16:15,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:16:15,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:16:15,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:16:15,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:16:15,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:16:15,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:16:15,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:16:15,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:16:15,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:16:15,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:16:15,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:16:15,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:16:15,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:16:15,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:16:15,461 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:16:15,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:16:15,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:16:15,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:16:15,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:16:15,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:16:15,463 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:16:15,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:16:15,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:16:15,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:16:15,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:16:15,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:16:15,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:16:15,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:16:15,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:16:15,464 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:16:15,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:16:15,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:16:15,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:16:15,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:16:15,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:16:15,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:16:15,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:16:15,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:16:15,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:16:15,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:16:15,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:16:15,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:16:15,467 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:16:15,467 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:16:15,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:16:15,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:16:15,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 314932412eeed441a28cefb8ae3e569787d9db1ef6d3b76281c1ff69eee43f8b [2021-12-21 12:16:15,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:16:15,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:16:15,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:16:15,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:16:15,691 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:16:15,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/terminator_02-1.c [2021-12-21 12:16:15,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40779838f/fe33fde740e64d2fa8c5a468d8521297/FLAG3173ae0ee [2021-12-21 12:16:16,043 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:16:16,044 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/terminator_02-1.c [2021-12-21 12:16:16,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40779838f/fe33fde740e64d2fa8c5a468d8521297/FLAG3173ae0ee [2021-12-21 12:16:16,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40779838f/fe33fde740e64d2fa8c5a468d8521297 [2021-12-21 12:16:16,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:16:16,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:16:16,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:16:16,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:16:16,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:16:16,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519ecc8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16, skipping insertion in model container [2021-12-21 12:16:16,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:16:16,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:16:16,585 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/terminator_02-1.c[327,340] [2021-12-21 12:16:16,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:16:16,618 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:16:16,626 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/terminator_02-1.c[327,340] [2021-12-21 12:16:16,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:16:16,636 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:16:16,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16 WrapperNode [2021-12-21 12:16:16,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:16:16,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:16:16,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:16:16,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:16:16,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,664 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2021-12-21 12:16:16,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:16:16,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:16:16,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:16:16,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:16:16,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:16:16,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:16:16,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:16:16,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:16:16,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (1/1) ... [2021-12-21 12:16:16,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:16:16,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:16,706 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) [2021-12-21 12:16:16,718 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 [2021-12-21 12:16:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:16:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:16:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:16:16,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:16:16,775 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:16:16,776 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:16:16,850 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:16:16,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:16:16,855 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:16:16,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:16:16 BoogieIcfgContainer [2021-12-21 12:16:16,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:16:16,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:16:16,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:16:16,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:16:16,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:16:16" (1/3) ... [2021-12-21 12:16:16,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7422d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:16:16, skipping insertion in model container [2021-12-21 12:16:16,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:16" (2/3) ... [2021-12-21 12:16:16,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7422d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:16:16, skipping insertion in model container [2021-12-21 12:16:16,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:16:16" (3/3) ... [2021-12-21 12:16:16,865 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_02-1.c [2021-12-21 12:16:16,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:16:16,868 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:16:16,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:16:16,905 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:16:16,906 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:16:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) [2021-12-21 12:16:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 12:16:16,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:16,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 12:16:16,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-12-21 12:16:16,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:16,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328708253] [2021-12-21 12:16:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:16,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:17,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:17,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328708253] [2021-12-21 12:16:17,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328708253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:16:17,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:16:17,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:16:17,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501780846] [2021-12-21 12:16:17,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:16:17,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:16:17,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:17,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:16:17,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:16:17,080 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-12-21 12:16:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:17,089 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-21 12:16:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:16:17,091 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2021-12-21 12:16:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:17,097 INFO L225 Difference]: With dead ends: 20 [2021-12-21 12:16:17,097 INFO L226 Difference]: Without dead ends: 8 [2021-12-21 12:16:17,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:16:17,104 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:17,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:16:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-21 12:16:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-21 12:16:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2021-12-21 12:16:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-12-21 12:16:17,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-12-21 12:16:17,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:17,129 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-12-21 12:16:17,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-12-21 12:16:17,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-12-21 12:16:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 12:16:17,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:17,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 12:16:17,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:16:17,131 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-12-21 12:16:17,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:17,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431522748] [2021-12-21 12:16:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:17,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:16:17,162 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 12:16:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:16:17,194 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 12:16:17,195 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 12:16:17,196 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:16:17,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:16:17,204 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-21 12:16:17,206 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:16:17,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:16:17 BoogieIcfgContainer [2021-12-21 12:16:17,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:16:17,227 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:16:17,227 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:16:17,227 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:16:17,228 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:16:16" (3/4) ... [2021-12-21 12:16:17,229 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-21 12:16:17,260 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 12:16:17,261 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:16:17,263 INFO L158 Benchmark]: Toolchain (without parser) took 783.20ms. Allocated memory is still 104.9MB. Free memory was 69.4MB in the beginning and 45.9MB in the end (delta: 23.5MB). Peak memory consumption was 22.6MB. Max. memory is 16.1GB. [2021-12-21 12:16:17,263 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 104.9MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:16:17,263 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.17ms. Allocated memory is still 104.9MB. Free memory was 69.2MB in the beginning and 81.5MB in the end (delta: -12.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:16:17,264 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.71ms. Allocated memory is still 104.9MB. Free memory was 81.5MB in the beginning and 80.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:16:17,264 INFO L158 Benchmark]: Boogie Preprocessor took 17.00ms. Allocated memory is still 104.9MB. Free memory was 80.3MB in the beginning and 79.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:16:17,266 INFO L158 Benchmark]: RCFGBuilder took 172.45ms. Allocated memory is still 104.9MB. Free memory was 79.0MB in the beginning and 70.2MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:16:17,266 INFO L158 Benchmark]: TraceAbstraction took 367.68ms. Allocated memory is still 104.9MB. Free memory was 69.4MB in the beginning and 47.6MB in the end (delta: 21.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-12-21 12:16:17,266 INFO L158 Benchmark]: Witness Printer took 34.24ms. Allocated memory is still 104.9MB. Free memory was 47.6MB in the beginning and 45.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:16:17,269 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 104.9MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 158.17ms. Allocated memory is still 104.9MB. Free memory was 69.2MB in the beginning and 81.5MB in the end (delta: -12.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.71ms. Allocated memory is still 104.9MB. Free memory was 81.5MB in the beginning and 80.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 17.00ms. Allocated memory is still 104.9MB. Free memory was 80.3MB in the beginning and 79.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 172.45ms. Allocated memory is still 104.9MB. Free memory was 79.0MB in the beginning and 70.2MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 367.68ms. Allocated memory is still 104.9MB. Free memory was 69.4MB in the beginning and 47.6MB in the end (delta: 21.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 34.24ms. Allocated memory is still 104.9MB. Free memory was 47.6MB in the beginning and 45.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int x=__VERIFIER_nondet_int(); [L17] int y=__VERIFIER_nondet_int(); [L18] int z=__VERIFIER_nondet_int(); [L20] COND FALSE !(x<100 && 100