./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/ddlm2013.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-lit/ddlm2013.i -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 65bd222d84b3d0ffad0fae15432ef5f02ecc91b1ed6d337cf01ace7c551e4ada --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 06:33:00,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 06:33:00,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 06:33:00,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 06:33:00,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 06:33:00,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 06:33:00,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 06:33:00,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 06:33:00,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 06:33:00,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 06:33:00,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 06:33:00,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 06:33:00,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 06:33:00,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 06:33:00,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 06:33:00,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 06:33:00,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 06:33:00,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 06:33:00,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 06:33:00,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 06:33:00,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 06:33:00,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 06:33:00,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 06:33:00,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 06:33:00,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 06:33:00,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 06:33:00,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 06:33:00,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 06:33:00,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 06:33:00,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 06:33:00,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 06:33:00,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 06:33:00,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 06:33:00,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 06:33:00,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 06:33:00,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 06:33:00,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 06:33:00,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 06:33:00,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 06:33:00,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 06:33:00,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 06:33:00,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 06:33:00,241 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 06:33:00,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 06:33:00,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 06:33:00,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 06:33:00,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 06:33:00,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 06:33:00,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 06:33:00,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 06:33:00,246 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 06:33:00,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 06:33:00,246 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 06:33:00,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 06:33:00,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 06:33:00,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 06:33:00,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 06:33:00,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 06:33:00,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 06:33:00,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 06:33:00,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 06:33:00,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 06:33:00,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 06:33:00,248 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 06:33:00,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 06:33:00,248 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 06:33:00,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 06:33:00,248 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 06:33:00,248 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65bd222d84b3d0ffad0fae15432ef5f02ecc91b1ed6d337cf01ace7c551e4ada [2023-02-17 06:33:00,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 06:33:00,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 06:33:00,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 06:33:00,466 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 06:33:00,466 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 06:33:00,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/ddlm2013.i [2023-02-17 06:33:01,459 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 06:33:01,617 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 06:33:01,618 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/ddlm2013.i [2023-02-17 06:33:01,623 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f45f213/bb4ff1feb1ea4bd7a2ce59a36e36e754/FLAGa2112b96a [2023-02-17 06:33:01,641 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f45f213/bb4ff1feb1ea4bd7a2ce59a36e36e754 [2023-02-17 06:33:01,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 06:33:01,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 06:33:01,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 06:33:01,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 06:33:01,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 06:33:01,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73680a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01, skipping insertion in model container [2023-02-17 06:33:01,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 06:33:01,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 06:33:01,766 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/ddlm2013.i[895,908] [2023-02-17 06:33:01,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 06:33:01,782 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 06:33:01,790 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/ddlm2013.i[895,908] [2023-02-17 06:33:01,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 06:33:01,801 INFO L208 MainTranslator]: Completed translation [2023-02-17 06:33:01,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01 WrapperNode [2023-02-17 06:33:01,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 06:33:01,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 06:33:01,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 06:33:01,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 06:33:01,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,821 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2023-02-17 06:33:01,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 06:33:01,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 06:33:01,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 06:33:01,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 06:33:01,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,833 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 06:33:01,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 06:33:01,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 06:33:01,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 06:33:01,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (1/1) ... [2023-02-17 06:33:01,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 06:33:01,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:33:01,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 06:33:01,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 06:33:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 06:33:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 06:33:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 06:33:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 06:33:01,947 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 06:33:01,948 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 06:33:02,065 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 06:33:02,069 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 06:33:02,069 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 06:33:02,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:33:02 BoogieIcfgContainer [2023-02-17 06:33:02,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 06:33:02,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 06:33:02,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 06:33:02,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 06:33:02,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 06:33:01" (1/3) ... [2023-02-17 06:33:02,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f5080b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:33:02, skipping insertion in model container [2023-02-17 06:33:02,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:33:01" (2/3) ... [2023-02-17 06:33:02,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f5080b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:33:02, skipping insertion in model container [2023-02-17 06:33:02,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:33:02" (3/3) ... [2023-02-17 06:33:02,078 INFO L112 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2023-02-17 06:33:02,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 06:33:02,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 06:33:02,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 06:33:02,148 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@79f86063, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 06:33:02,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 06:33:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 06:33:02,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:33:02,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:33:02,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:33:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:33:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1805459912, now seen corresponding path program 1 times [2023-02-17 06:33:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:33:02,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286999535] [2023-02-17 06:33:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:33:02,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:33:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:33:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:33:02,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:33:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286999535] [2023-02-17 06:33:02,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286999535] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 06:33:02,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 06:33:02,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 06:33:02,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535283522] [2023-02-17 06:33:02,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 06:33:02,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 06:33:02,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:33:02,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 06:33:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 06:33:02,323 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-02-17 06:33:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:33:02,336 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-02-17 06:33:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 06:33:02,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2023-02-17 06:33:02,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:33:02,343 INFO L225 Difference]: With dead ends: 24 [2023-02-17 06:33:02,343 INFO L226 Difference]: Without dead ends: 10 [2023-02-17 06:33:02,345 INFO L412 NwaCegarLoop]: 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 [2023-02-17 06:33:02,349 INFO L413 NwaCegarLoop]: 18 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, 18 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 [2023-02-17 06:33:02,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 06:33:02,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-17 06:33:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-17 06:33:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-02-17 06:33:02,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2023-02-17 06:33:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:33:02,372 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-02-17 06:33:02,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-02-17 06:33:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-02-17 06:33:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 06:33:02,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:33:02,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:33:02,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 06:33:02,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:33:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:33:02,375 INFO L85 PathProgramCache]: Analyzing trace with hash 122256666, now seen corresponding path program 1 times [2023-02-17 06:33:02,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:33:02,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937771289] [2023-02-17 06:33:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:33:02,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:33:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:33:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:33:02,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:33:02,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937771289] [2023-02-17 06:33:02,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937771289] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 06:33:02,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 06:33:02,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 06:33:02,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937282530] [2023-02-17 06:33:02,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 06:33:02,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 06:33:02,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:33:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 06:33:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 06:33:02,580 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-02-17 06:33:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:33:02,605 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-02-17 06:33:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 06:33:02,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 06:33:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:33:02,606 INFO L225 Difference]: With dead ends: 16 [2023-02-17 06:33:02,607 INFO L226 Difference]: Without dead ends: 12 [2023-02-17 06:33:02,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 06:33:02,608 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 06:33:02,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 06:33:02,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-17 06:33:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-17 06:33:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-17 06:33:02,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2023-02-17 06:33:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:33:02,611 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-17 06:33:02,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-02-17 06:33:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-17 06:33:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 06:33:02,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:33:02,612 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:33:02,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 06:33:02,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:33:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:33:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1514407247, now seen corresponding path program 1 times [2023-02-17 06:33:02,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:33:02,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473079246] [2023-02-17 06:33:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:33:02,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:33:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:33:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:33:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:33:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473079246] [2023-02-17 06:33:02,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473079246] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 06:33:02,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030360000] [2023-02-17 06:33:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:33:02,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:33:02,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:33:02,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 06:33:02,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 06:33:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:33:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 06:33:02,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:33:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:33:02,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:33:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:33:03,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030360000] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:33:03,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 06:33:03,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2023-02-17 06:33:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341773746] [2023-02-17 06:33:03,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 06:33:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 06:33:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:33:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 06:33:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-17 06:33:03,012 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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) [2023-02-17 06:33:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:33:03,096 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-02-17 06:33:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 06:33:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-17 06:33:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:33:03,097 INFO L225 Difference]: With dead ends: 21 [2023-02-17 06:33:03,098 INFO L226 Difference]: Without dead ends: 17 [2023-02-17 06:33:03,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-02-17 06:33:03,099 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 06:33:03,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 06:33:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-17 06:33:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-02-17 06:33:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-02-17 06:33:03,102 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2023-02-17 06:33:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:33:03,103 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-02-17 06:33:03,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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) [2023-02-17 06:33:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-02-17 06:33:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 06:33:03,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:33:03,105 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:33:03,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 06:33:03,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:33:03,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:33:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:33:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2100501679, now seen corresponding path program 1 times [2023-02-17 06:33:03,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:33:03,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566066476] [2023-02-17 06:33:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:33:03,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:33:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:33:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 06:33:03,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:33:03,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566066476] [2023-02-17 06:33:03,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566066476] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 06:33:03,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 06:33:03,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 06:33:03,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449748644] [2023-02-17 06:33:03,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 06:33:03,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 06:33:03,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:33:03,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 06:33:03,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 06:33:03,335 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:33:03,339 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-02-17 06:33:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 06:33:03,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-17 06:33:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:33:03,340 INFO L225 Difference]: With dead ends: 24 [2023-02-17 06:33:03,346 INFO L226 Difference]: Without dead ends: 15 [2023-02-17 06:33:03,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 06:33:03,347 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 06:33:03,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 06:33:03,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-17 06:33:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-17 06:33:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-17 06:33:03,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2023-02-17 06:33:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:33:03,350 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-17 06:33:03,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-17 06:33:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 06:33:03,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:33:03,351 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:33:03,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 06:33:03,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:33:03,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:33:03,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1426811654, now seen corresponding path program 2 times [2023-02-17 06:33:03,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:33:03,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394898922] [2023-02-17 06:33:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:33:03,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:33:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:33:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:33:03,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:33:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394898922] [2023-02-17 06:33:03,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394898922] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 06:33:03,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357680167] [2023-02-17 06:33:03,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 06:33:03,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:33:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:33:03,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 06:33:03,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 06:33:03,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 06:33:03,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 06:33:03,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 06:33:03,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:33:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:33:03,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:33:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:33:03,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357680167] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:33:03,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 06:33:03,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-17 06:33:03,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240146365] [2023-02-17 06:33:03,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 06:33:03,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 06:33:03,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:33:03,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 06:33:03,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-02-17 06:33:03,759 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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) [2023-02-17 06:33:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:33:04,099 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-02-17 06:33:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 06:33:04,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-17 06:33:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:33:04,101 INFO L225 Difference]: With dead ends: 42 [2023-02-17 06:33:04,101 INFO L226 Difference]: Without dead ends: 25 [2023-02-17 06:33:04,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-02-17 06:33:04,102 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 06:33:04,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 06:33:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-17 06:33:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2023-02-17 06:33:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-02-17 06:33:04,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2023-02-17 06:33:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:33:04,111 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-02-17 06:33:04,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 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) [2023-02-17 06:33:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-02-17 06:33:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 06:33:04,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:33:04,112 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:33:04,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 06:33:04,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:33:04,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:33:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:33:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash -971227279, now seen corresponding path program 1 times [2023-02-17 06:33:04,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:33:04,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660896893] [2023-02-17 06:33:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:33:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:33:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:33:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 06:33:04,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:33:04,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660896893] [2023-02-17 06:33:04,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660896893] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 06:33:04,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143673651] [2023-02-17 06:33:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:33:04,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:33:04,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:33:04,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 06:33:04,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 06:33:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:33:04,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 06:33:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:33:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 06:33:04,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:33:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 06:33:04,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143673651] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 06:33:04,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:33:04,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 7 [2023-02-17 06:33:04,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554570251] [2023-02-17 06:33:04,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 06:33:04,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 06:33:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:33:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 06:33:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-17 06:33:04,530 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:33:04,537 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2023-02-17 06:33:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 06:33:04,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 06:33:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:33:04,539 INFO L225 Difference]: With dead ends: 18 [2023-02-17 06:33:04,539 INFO L226 Difference]: Without dead ends: 0 [2023-02-17 06:33:04,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-17 06:33:04,541 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 06:33:04,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 06:33:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-17 06:33:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-17 06:33:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-02-17 06:33:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-17 06:33:04,546 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2023-02-17 06:33:04,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:33:04,546 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-17 06:33:04,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:33:04,546 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-17 06:33:04,546 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-17 06:33:04,548 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 06:33:04,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 06:33:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:33:04,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-17 06:33:04,760 INFO L899 garLoopResultBuilder]: For program point L35-2(lines 24 49) no Hoare annotation was computed. [2023-02-17 06:33:04,760 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-17 06:33:04,761 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2023-02-17 06:33:04,761 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-17 06:33:04,761 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 24 49) the Hoare annotation is: true [2023-02-17 06:33:04,761 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-17 06:33:04,761 INFO L899 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2023-02-17 06:33:04,761 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-17 06:33:04,761 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2023-02-17 06:33:04,761 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-02-17 06:33:04,762 INFO L902 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2023-02-17 06:33:04,762 INFO L899 garLoopResultBuilder]: For program point L45-1(lines 45 47) no Hoare annotation was computed. [2023-02-17 06:33:04,762 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 43) no Hoare annotation was computed. [2023-02-17 06:33:04,762 INFO L895 garLoopResultBuilder]: At program point L39-2(lines 35 44) the Hoare annotation is: (let ((.cse8 (= (+ |ULTIMATE.start_main_~j~0#1| (- 1)) 0)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| 0)) (.cse10 (= |ULTIMATE.start_main_~b~0#1| 0))) (let ((.cse0 (= |ULTIMATE.start_main_~flag~0#1| 0)) (.cse5 (or (and (= (+ (* 1 (- 1)) |ULTIMATE.start_main_~b~0#1|) 0) (= |ULTIMATE.start_main_~a~0#1| (+ 1 0))) (and .cse8 .cse9 .cse10))) (.cse1 (let ((.cse11 (mod |ULTIMATE.start_main_~i~0#1| 2))) (let ((.cse12 (= 0 .cse11)) (.cse13 (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 0))) (or (and (= 0 (mod (+ .cse11 4294967294) 4294967296)) (not .cse12) .cse13) (and (or .cse12 (not .cse13)) (= 0 (mod .cse11 4294967296)))))))) (or .cse0 (and .cse1 (let ((.cse2 (= (mod (+ |ULTIMATE.start_main_~a~0#1| 2) 4294967296) (mod (+ (* |ULTIMATE.start_main_~j~0#1| 2) (* |ULTIMATE.start_main_~i~0#1| 4294967294) |ULTIMATE.start_main_~b~0#1|) 4294967296))) (.cse3 (= (mod (+ |ULTIMATE.start_main_~a~0#1| 1) 4294967296) (mod (+ |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~i~0#1| 4294967295) |ULTIMATE.start_main_~b~0#1|) 4294967296)))) (or (and .cse2 (= (mod |ULTIMATE.start_main_~a~0#1| 4294967296) (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) .cse3) (let ((.cse6 (+ |ULTIMATE.start_main_~j~0#1| (- 2)))) (let ((.cse4 (+ .cse6 (* |ULTIMATE.start_main_~b~0#1| (- 1)) 0))) (and (= (+ |ULTIMATE.start_main_~a~0#1| (- 1)) 0) (= |ULTIMATE.start_main_~i~0#1| (+ 2 .cse4)) .cse5 (= .cse4 0) (= (+ .cse6 (- 1)) 0)))) (and (= |ULTIMATE.start_main_~b~0#1| (let ((.cse7 (+ 3 (- 2)))) (+ .cse7 (+ 3 (+ (- 2) (+ (+ (- 3) 2) (- (* .cse7 (- 1))) 0)))))) .cse2 (= |ULTIMATE.start_main_~a~0#1| (+ 1 1)) .cse3)))) (and .cse0 .cse5) (and .cse8 .cse9 (= |ULTIMATE.start_main_~i~0#1| 0) .cse1 .cse10)))) [2023-02-17 06:33:04,763 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 44) no Hoare annotation was computed. [2023-02-17 06:33:04,764 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-02-17 06:33:04,766 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 06:33:04,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 06:33:04 BoogieIcfgContainer [2023-02-17 06:33:04,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 06:33:04,778 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 06:33:04,778 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 06:33:04,778 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 06:33:04,783 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:33:02" (3/4) ... [2023-02-17 06:33:04,785 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-17 06:33:04,791 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2023-02-17 06:33:04,791 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-02-17 06:33:04,792 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-17 06:33:04,792 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-17 06:33:04,812 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 06:33:04,812 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 06:33:04,813 INFO L158 Benchmark]: Toolchain (without parser) took 3168.16ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 71.6MB in the beginning and 53.0MB in the end (delta: 18.5MB). Peak memory consumption was 43.6MB. Max. memory is 16.1GB. [2023-02-17 06:33:04,813 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 92.3MB. Free memory is still 44.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 06:33:04,813 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.02ms. Allocated memory is still 115.3MB. Free memory was 71.6MB in the beginning and 61.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 06:33:04,813 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.11ms. Allocated memory is still 115.3MB. Free memory was 61.1MB in the beginning and 59.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 06:33:04,816 INFO L158 Benchmark]: Boogie Preprocessor took 13.32ms. Allocated memory is still 115.3MB. Free memory was 59.6MB in the beginning and 58.7MB in the end (delta: 847.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 06:33:04,816 INFO L158 Benchmark]: RCFGBuilder took 235.23ms. Allocated memory is still 115.3MB. Free memory was 58.3MB in the beginning and 49.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-17 06:33:04,816 INFO L158 Benchmark]: TraceAbstraction took 2704.83ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 48.2MB in the beginning and 56.2MB in the end (delta: -8.0MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2023-02-17 06:33:04,817 INFO L158 Benchmark]: Witness Printer took 34.35ms. Allocated memory is still 138.4MB. Free memory was 56.2MB in the beginning and 53.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-17 06:33:04,818 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 92.3MB. Free memory is still 44.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 156.02ms. Allocated memory is still 115.3MB. Free memory was 71.6MB in the beginning and 61.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.11ms. Allocated memory is still 115.3MB. Free memory was 61.1MB in the beginning and 59.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.32ms. Allocated memory is still 115.3MB. Free memory was 59.6MB in the beginning and 58.7MB in the end (delta: 847.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 235.23ms. Allocated memory is still 115.3MB. Free memory was 58.3MB in the beginning and 49.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2704.83ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 48.2MB in the beginning and 56.2MB in the end (delta: -8.0MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. * Witness Printer took 34.35ms. Allocated memory is still 138.4MB. Free memory was 56.2MB in the beginning and 53.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 210 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 144 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 144 IncrementalHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 66 mSDtfsCounter, 144 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=5, InterpolantAutomatonStates: 35, 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, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 9 NumberOfFragments, 293 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 2328 SizeOfPredicates, 11 NumberOfNonLiveVariables, 209 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 41/74 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((flag == 0 || ((((0 == (i % 2 + 4294967294) % 4294967296 && !(0 == i % 2)) && i % 4294967296 < 0) || ((0 == i % 2 || !(i % 4294967296 < 0)) && 0 == i % 2 % 4294967296)) && (((((a + 2) % 4294967296 == (j * 2 + i * 4294967294 + b) % 4294967296 && a % 4294967296 == b % 4294967296) && (a + 1) % 4294967296 == (j + i * 4294967295 + b) % 4294967296) || ((((a + -1 == 0 && i == 2 + (j + -2 + b * -1 + 0)) && ((1 * -1 + b == 0 && a == 1 + 0) || ((j + -1 == 0 && a == 0) && b == 0))) && j + -2 + b * -1 + 0 == 0) && j + -2 + -1 == 0)) || (((b == 3 + -2 + (3 + (-2 + (-3 + 2 + -((3 + -2) * -1) + 0))) && (a + 2) % 4294967296 == (j * 2 + i * 4294967294 + b) % 4294967296) && a == 1 + 1) && (a + 1) % 4294967296 == (j + i * 4294967295 + b) % 4294967296)))) || (flag == 0 && ((1 * -1 + b == 0 && a == 1 + 0) || ((j + -1 == 0 && a == 0) && b == 0)))) || ((((j + -1 == 0 && a == 0) && i == 0) && (((0 == (i % 2 + 4294967294) % 4294967296 && !(0 == i % 2)) && i % 4294967296 < 0) || ((0 == i % 2 || !(i % 4294967296 < 0)) && 0 == i % 2 % 4294967296))) && b == 0) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-02-17 06:33:04,839 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 Result: TRUE