./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/recursive-simple/id_o10.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 4bb99911cbd112fadfd665fb729cfe0ed3dacf957fcff0e177d295c79af00a62 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:25:22,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:25:22,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:25:22,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:25:22,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:25:22,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:25:22,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:25:22,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:25:22,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:25:22,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:25:22,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:25:22,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:25:22,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:25:22,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:25:22,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:25:22,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:25:22,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:25:22,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:25:22,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:25:22,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:25:22,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:25:22,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:25:22,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:25:22,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:25:22,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:25:22,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:25:22,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:25:22,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:25:22,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:25:22,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:25:22,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:25:22,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:25:22,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:25:22,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:25:22,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:25:22,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:25:22,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:25:22,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:25:22,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:25:22,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:25:22,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:25:22,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:25:22,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:25:22,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:25:22,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:25:22,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:25:22,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:25:22,056 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:25:22,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:25:22,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:25:22,057 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:25:22,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:25:22,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:25:22,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:25:22,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:25:22,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:25:22,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:25:22,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:25:22,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:25:22,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:25:22,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:25:22,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:25:22,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:25:22,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:25:22,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:25:22,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:25:22,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:25:22,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:25:22,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:25:22,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:25:22,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:25:22,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:25:22,061 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:25:22,061 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:25:22,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:25:22,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:25:22,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4bb99911cbd112fadfd665fb729cfe0ed3dacf957fcff0e177d295c79af00a62 [2021-12-17 15:25:22,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:25:22,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:25:22,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:25:22,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:25:22,290 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:25:22,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o10.c [2021-12-17 15:25:22,410 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c049ff3/0b4033160a0d468fb049bdd601b9cc56/FLAG91d3d2386 [2021-12-17 15:25:22,854 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:25:22,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o10.c [2021-12-17 15:25:22,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c049ff3/0b4033160a0d468fb049bdd601b9cc56/FLAG91d3d2386 [2021-12-17 15:25:23,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c049ff3/0b4033160a0d468fb049bdd601b9cc56 [2021-12-17 15:25:23,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:25:23,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:25:23,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:25:23,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:25:23,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:25:23,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689289f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23, skipping insertion in model container [2021-12-17 15:25:23,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:25:23,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:25:23,504 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/recursive-simple/id_o10.c[516,529] [2021-12-17 15:25:23,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:25:23,519 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:25:23,535 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/recursive-simple/id_o10.c[516,529] [2021-12-17 15:25:23,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:25:23,546 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:25:23,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23 WrapperNode [2021-12-17 15:25:23,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:25:23,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:25:23,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:25:23,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:25:23,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,576 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2021-12-17 15:25:23,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:25:23,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:25:23,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:25:23,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:25:23,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:25:23,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:25:23,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:25:23,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:25:23,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (1/1) ... [2021-12-17 15:25:23,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:25:23,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:23,644 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) [2021-12-17 15:25:23,660 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 [2021-12-17 15:25:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:25:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:25:23,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:25:23,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:25:23,693 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-12-17 15:25:23,694 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-12-17 15:25:23,768 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:25:23,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:25:23,840 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:25:23,844 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:25:23,847 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 15:25:23,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:25:23 BoogieIcfgContainer [2021-12-17 15:25:23,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:25:23,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:25:23,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:25:23,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:25:23,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:25:23" (1/3) ... [2021-12-17 15:25:23,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3734a10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:25:23, skipping insertion in model container [2021-12-17 15:25:23,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:25:23" (2/3) ... [2021-12-17 15:25:23,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3734a10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:25:23, skipping insertion in model container [2021-12-17 15:25:23,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:25:23" (3/3) ... [2021-12-17 15:25:23,856 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o10.c [2021-12-17 15:25:23,866 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:25:23,867 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:25:23,909 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:25:23,915 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 [2021-12-17 15:25:23,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:25:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 15:25:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 15:25:23,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:23,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:23,940 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-12-17 15:25:23,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:23,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254576706] [2021-12-17 15:25:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:23,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:25:24,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:24,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254576706] [2021-12-17 15:25:24,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254576706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:25:24,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:25:24,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:25:24,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716614455] [2021-12-17 15:25:24,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:25:24,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:25:24,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:25:24,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:25:24,240 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 15:25:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:24,270 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-17 15:25:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:25:24,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-12-17 15:25:24,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:24,279 INFO L225 Difference]: With dead ends: 28 [2021-12-17 15:25:24,279 INFO L226 Difference]: Without dead ends: 15 [2021-12-17 15:25:24,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:25:24,284 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:24,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:25:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-17 15:25:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-17 15:25:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 15:25:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-17 15:25:24,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-12-17 15:25:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:24,313 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-17 15:25:24,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 15:25:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-17 15:25:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 15:25:24,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:24,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:24,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:25:24,315 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-12-17 15:25:24,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:24,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676911376] [2021-12-17 15:25:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:24,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:24,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:24,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:25:24,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:24,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676911376] [2021-12-17 15:25:24,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676911376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:24,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914777650] [2021-12-17 15:25:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:24,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:24,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:25:24,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 15:25:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:24,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 15:25:24,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:25:24,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:25:24,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914777650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:24,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:24,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-17 15:25:24,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172547056] [2021-12-17 15:25:24,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:24,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 15:25:24,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:24,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 15:25:24,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:25:24,798 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 15:25:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:24,824 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-12-17 15:25:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 15:25:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2021-12-17 15:25:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:24,825 INFO L225 Difference]: With dead ends: 27 [2021-12-17 15:25:24,826 INFO L226 Difference]: Without dead ends: 21 [2021-12-17 15:25:24,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:25:24,827 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:24,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:25:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-17 15:25:24,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-17 15:25:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 15:25:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-17 15:25:24,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-12-17 15:25:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:24,832 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-17 15:25:24,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 15:25:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-17 15:25:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 15:25:24,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:24,833 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:24,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:25,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:25,048 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times [2021-12-17 15:25:25,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934999434] [2021-12-17 15:25:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:25,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:25:25,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:25,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934999434] [2021-12-17 15:25:25,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934999434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:25,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776289767] [2021-12-17 15:25:25,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:25:25,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:25,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:25:25,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 15:25:25,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:25:25,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 15:25:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:25:25,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:25:25,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776289767] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:25,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:25,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-17 15:25:25,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165693719] [2021-12-17 15:25:25,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:25,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 15:25:25,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:25,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 15:25:25,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-17 15:25:25,827 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-17 15:25:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:26,007 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-17 15:25:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 15:25:26,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 28 [2021-12-17 15:25:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:26,008 INFO L225 Difference]: With dead ends: 39 [2021-12-17 15:25:26,008 INFO L226 Difference]: Without dead ends: 33 [2021-12-17 15:25:26,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-12-17 15:25:26,009 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:26,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:25:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-17 15:25:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-17 15:25:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 15:25:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-17 15:25:26,013 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-12-17 15:25:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:26,013 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-17 15:25:26,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-17 15:25:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-17 15:25:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 15:25:26,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:26,015 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:26,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:26,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 15:25:26,233 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 3 times [2021-12-17 15:25:26,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:26,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138526354] [2021-12-17 15:25:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:26,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:26,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:26,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:26,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:26,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:26,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:26,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:26,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:25:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:25:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-17 15:25:26,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:25:26,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138526354] [2021-12-17 15:25:26,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138526354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:25:26,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682777058] [2021-12-17 15:25:26,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:25:26,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:26,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:25:26,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:25:26,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 15:25:26,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-17 15:25:26,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:25:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 15:25:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:25:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-17 15:25:26,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:25:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-17 15:25:27,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682777058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:25:27,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:25:27,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2021-12-17 15:25:27,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204886645] [2021-12-17 15:25:27,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:25:27,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 15:25:27,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:25:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 15:25:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 15:25:27,751 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-17 15:25:29,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:25:29,188 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-12-17 15:25:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 15:25:29,188 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 52 [2021-12-17 15:25:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:25:29,190 INFO L225 Difference]: With dead ends: 63 [2021-12-17 15:25:29,190 INFO L226 Difference]: Without dead ends: 57 [2021-12-17 15:25:29,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=329, Invalid=2023, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 15:25:29,191 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:25:29,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 467 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:25:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-17 15:25:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-17 15:25:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (18), 16 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-17 15:25:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-12-17 15:25:29,198 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2021-12-17 15:25:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:25:29,198 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-12-17 15:25:29,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-17 15:25:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-12-17 15:25:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 15:25:29,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:25:29,200 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:25:29,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 15:25:29,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:25:29,415 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:25:29,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:25:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 4 times [2021-12-17 15:25:29,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:25:29,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740641858] [2021-12-17 15:25:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:25:29,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:25:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 15:25:29,499 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 15:25:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 15:25:29,559 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 15:25:29,560 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 15:25:29,560 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 15:25:29,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:25:29,578 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1] [2021-12-17 15:25:29,581 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 15:25:29,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 03:25:29 BoogieIcfgContainer [2021-12-17 15:25:29,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 15:25:29,639 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 15:25:29,639 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 15:25:29,639 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 15:25:29,639 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:25:23" (3/4) ... [2021-12-17 15:25:29,641 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 15:25:29,710 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 15:25:29,710 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 15:25:29,711 INFO L158 Benchmark]: Toolchain (without parser) took 6421.81ms. Allocated memory was 96.5MB in the beginning and 136.3MB in the end (delta: 39.8MB). Free memory was 57.7MB in the beginning and 91.2MB in the end (delta: -33.5MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-12-17 15:25:29,711 INFO L158 Benchmark]: CDTParser took 0.58ms. Allocated memory is still 96.5MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 15:25:29,711 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.50ms. Allocated memory is still 96.5MB. Free memory was 57.6MB in the beginning and 73.1MB in the end (delta: -15.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 15:25:29,711 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.52ms. Allocated memory is still 96.5MB. Free memory was 73.1MB in the beginning and 71.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 15:25:29,712 INFO L158 Benchmark]: Boogie Preprocessor took 17.59ms. Allocated memory is still 96.5MB. Free memory was 71.6MB in the beginning and 70.7MB in the end (delta: 900.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 15:25:29,712 INFO L158 Benchmark]: RCFGBuilder took 252.79ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 62.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 15:25:29,712 INFO L158 Benchmark]: TraceAbstraction took 5787.03ms. Allocated memory was 96.5MB in the beginning and 136.3MB in the end (delta: 39.8MB). Free memory was 61.7MB in the beginning and 94.4MB in the end (delta: -32.6MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2021-12-17 15:25:29,712 INFO L158 Benchmark]: Witness Printer took 71.46ms. Allocated memory is still 136.3MB. Free memory was 94.4MB in the beginning and 91.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 15:25:29,714 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58ms. Allocated memory is still 96.5MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.50ms. Allocated memory is still 96.5MB. Free memory was 57.6MB in the beginning and 73.1MB in the end (delta: -15.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.52ms. Allocated memory is still 96.5MB. Free memory was 73.1MB in the beginning and 71.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.59ms. Allocated memory is still 96.5MB. Free memory was 71.6MB in the beginning and 70.7MB in the end (delta: 900.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 252.79ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 62.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5787.03ms. Allocated memory was 96.5MB in the beginning and 136.3MB in the end (delta: 39.8MB). Free memory was 61.7MB in the beginning and 94.4MB in the end (delta: -32.6MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * Witness Printer took 71.46ms. Allocated memory is still 136.3MB. Free memory was 94.4MB in the beginning and 91.2MB in the end (delta: 3.1MB). 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=10, input=10] [L13] unsigned int result = id(input); [L14] COND TRUE result == 10 VAL [input=10, result=10] [L15] reach_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.7s, OverallIterations: 5, TraceHistogramMax: 11, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 826 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 749 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 306 IncrementalHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 77 mSDtfsCounter, 306 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 274 GetRequests, 186 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=4, InterpolantAutomatonStates: 70, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 288 ConstructedInterpolants, 0 QuantifiedInterpolants, 1147 SizeOfPredicates, 3 NumberOfNonLiveVariables, 264 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 282/564 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-17 15:25:29,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE