./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/gcd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/gcd01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ceea5216a7b51ee21eab36f0e9b129c25f18193871fb4ca0aa52ef8740fc0ce8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:26:53,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:26:53,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:26:53,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:26:53,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:26:53,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:26:53,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:26:53,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:26:53,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:26:53,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:26:53,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:26:53,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:26:53,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:26:53,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:26:53,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:26:53,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:26:53,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:26:53,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:26:53,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:26:53,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:26:53,608 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:26:53,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:26:53,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:26:53,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:26:53,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:26:53,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:26:53,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:26:53,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:26:53,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:26:53,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:26:53,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:26:53,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:26:53,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:26:53,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:26:53,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:26:53,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:26:53,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:26:53,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:26:53,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:26:53,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:26:53,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:26:53,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:26:53,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:26:53,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:26:53,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:26:53,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:26:53,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:26:53,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:26:53,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:26:53,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:26:53,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:26:53,652 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:26:53,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:26:53,652 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:26:53,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:26:53,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:26:53,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:26:53,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:26:53,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:26:53,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:26:53,653 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:26:53,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:26:53,654 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:26:53,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:26:53,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:26:53,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:26:53,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:26:53,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:26:53,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:26:53,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:26:53,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:26:53,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:26:53,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:26:53,655 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:26:53,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:26:53,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:26:53,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceea5216a7b51ee21eab36f0e9b129c25f18193871fb4ca0aa52ef8740fc0ce8 [2022-07-19 17:26:53,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:26:53,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:26:53,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:26:53,920 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:26:53,920 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:26:53,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd01-1.c [2022-07-19 17:26:53,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4671a4b4b/b6006fa6b84149c4ad6038dddeb53fc9/FLAGcfc7e4e8a [2022-07-19 17:26:54,511 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:26:54,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd01-1.c [2022-07-19 17:26:54,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4671a4b4b/b6006fa6b84149c4ad6038dddeb53fc9/FLAGcfc7e4e8a [2022-07-19 17:26:54,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4671a4b4b/b6006fa6b84149c4ad6038dddeb53fc9 [2022-07-19 17:26:55,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:26:55,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:26:55,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:26:55,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:26:55,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:26:55,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23875c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55, skipping insertion in model container [2022-07-19 17:26:55,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:26:55,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:26:55,269 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/gcd01-1.c[1008,1021] [2022-07-19 17:26:55,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:26:55,278 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:26:55,298 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/gcd01-1.c[1008,1021] [2022-07-19 17:26:55,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:26:55,314 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:26:55,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55 WrapperNode [2022-07-19 17:26:55,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:26:55,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:26:55,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:26:55,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:26:55,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,360 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-07-19 17:26:55,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:26:55,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:26:55,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:26:55,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:26:55,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:26:55,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:26:55,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:26:55,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:26:55,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (1/1) ... [2022-07-19 17:26:55,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:26:55,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:55,425 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) [2022-07-19 17:26:55,443 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 [2022-07-19 17:26:55,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:26:55,458 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2022-07-19 17:26:55,459 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2022-07-19 17:26:55,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:26:55,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:26:55,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:26:55,511 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:26:55,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:26:55,677 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:26:55,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:26:55,681 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 17:26:55,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:26:55 BoogieIcfgContainer [2022-07-19 17:26:55,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:26:55,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:26:55,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:26:55,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:26:55,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:26:55" (1/3) ... [2022-07-19 17:26:55,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bad59a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:26:55, skipping insertion in model container [2022-07-19 17:26:55,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:55" (2/3) ... [2022-07-19 17:26:55,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bad59a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:26:55, skipping insertion in model container [2022-07-19 17:26:55,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:26:55" (3/3) ... [2022-07-19 17:26:55,689 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2022-07-19 17:26:55,699 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:26:55,699 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:26:55,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:26:55,757 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ce5222a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1cae27f3 [2022-07-19 17:26:55,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:26:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 17:26:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 17:26:55,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:55,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:55,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash -697503145, now seen corresponding path program 1 times [2022-07-19 17:26:55,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:55,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854698297] [2022-07-19 17:26:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:55,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:26:56,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:56,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854698297] [2022-07-19 17:26:56,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854698297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:56,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:56,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 17:26:56,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925045405] [2022-07-19 17:26:56,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:56,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 17:26:56,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 17:26:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:26:56,133 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-07-19 17:26:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:56,264 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-07-19 17:26:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:26:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 12 [2022-07-19 17:26:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:56,274 INFO L225 Difference]: With dead ends: 37 [2022-07-19 17:26:56,274 INFO L226 Difference]: Without dead ends: 21 [2022-07-19 17:26:56,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:26:56,280 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:56,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 61 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:26:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-19 17:26:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-19 17:26:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 17:26:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-07-19 17:26:56,316 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-07-19 17:26:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:56,317 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-07-19 17:26:56,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-07-19 17:26:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-07-19 17:26:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 17:26:56,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:56,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:56,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:26:56,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:56,338 INFO L85 PathProgramCache]: Analyzing trace with hash 424402023, now seen corresponding path program 1 times [2022-07-19 17:26:56,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:56,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630795656] [2022-07-19 17:26:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:56,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:26:56,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:56,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630795656] [2022-07-19 17:26:56,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630795656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:56,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:56,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 17:26:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989127395] [2022-07-19 17:26:56,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 17:26:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 17:26:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:26:56,420 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-19 17:26:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:56,466 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-07-19 17:26:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:26:56,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-07-19 17:26:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:56,467 INFO L225 Difference]: With dead ends: 27 [2022-07-19 17:26:56,467 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 17:26:56,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:26:56,469 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:56,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:26:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 17:26:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-07-19 17:26:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 17:26:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-07-19 17:26:56,477 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2022-07-19 17:26:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:56,478 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-07-19 17:26:56,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-07-19 17:26:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-07-19 17:26:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 17:26:56,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:56,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:56,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 17:26:56,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1186566545, now seen corresponding path program 1 times [2022-07-19 17:26:56,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251521817] [2022-07-19 17:26:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 17:26:56,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:56,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251521817] [2022-07-19 17:26:56,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251521817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:56,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:56,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 17:26:56,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722720203] [2022-07-19 17:26:56,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:56,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 17:26:56,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 17:26:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:26:56,660 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:26:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:56,820 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-07-19 17:26:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:26:56,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-19 17:26:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:56,822 INFO L225 Difference]: With dead ends: 33 [2022-07-19 17:26:56,822 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 17:26:56,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-19 17:26:56,823 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:56,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 45 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:26:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 17:26:56,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-07-19 17:26:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 17:26:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-07-19 17:26:56,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-07-19 17:26:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:56,829 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-07-19 17:26:56,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:26:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-07-19 17:26:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 17:26:56,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:56,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 17:26:56,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash -159193201, now seen corresponding path program 1 times [2022-07-19 17:26:56,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:56,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805555079] [2022-07-19 17:26:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 17:26:56,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:56,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805555079] [2022-07-19 17:26:56,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805555079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:56,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:56,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:26:56,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242372964] [2022-07-19 17:26:56,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:56,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:26:56,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:56,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:26:56,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:26:56,994 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:26:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:57,054 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-07-19 17:26:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:26:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-19 17:26:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:57,056 INFO L225 Difference]: With dead ends: 33 [2022-07-19 17:26:57,056 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 17:26:57,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-19 17:26:57,057 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:57,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 46 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:26:57,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 17:26:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-07-19 17:26:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 17:26:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-19 17:26:57,066 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 20 [2022-07-19 17:26:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:57,067 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-19 17:26:57,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:26:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-19 17:26:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 17:26:57,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:57,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:57,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 17:26:57,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:57,072 INFO L85 PathProgramCache]: Analyzing trace with hash -240281673, now seen corresponding path program 1 times [2022-07-19 17:26:57,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:57,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241151254] [2022-07-19 17:26:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:57,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 17:26:57,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:57,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241151254] [2022-07-19 17:26:57,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241151254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:57,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:57,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:26:57,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603713834] [2022-07-19 17:26:57,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:57,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:26:57,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:26:57,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:26:57,162 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 17:26:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:57,202 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-07-19 17:26:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:26:57,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-07-19 17:26:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:57,203 INFO L225 Difference]: With dead ends: 28 [2022-07-19 17:26:57,203 INFO L226 Difference]: Without dead ends: 24 [2022-07-19 17:26:57,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-19 17:26:57,205 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:57,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:26:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-19 17:26:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-07-19 17:26:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 17:26:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-19 17:26:57,209 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 21 [2022-07-19 17:26:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:57,209 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-19 17:26:57,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 17:26:57,209 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-19 17:26:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 17:26:57,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:57,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:57,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 17:26:57,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash 998569559, now seen corresponding path program 1 times [2022-07-19 17:26:57,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:57,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443032591] [2022-07-19 17:26:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:57,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 17:26:57,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:57,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443032591] [2022-07-19 17:26:57,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443032591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:57,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:57,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:26:57,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100469059] [2022-07-19 17:26:57,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:57,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:26:57,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:57,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:26:57,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:26:57,357 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 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) [2022-07-19 17:26:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:57,439 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-07-19 17:26:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:26:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 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) Word has length 21 [2022-07-19 17:26:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:57,440 INFO L225 Difference]: With dead ends: 31 [2022-07-19 17:26:57,440 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 17:26:57,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-19 17:26:57,441 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:57,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:26:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 17:26:57,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-19 17:26:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 17:26:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-19 17:26:57,446 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2022-07-19 17:26:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:57,446 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-19 17:26:57,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 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) [2022-07-19 17:26:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-19 17:26:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 17:26:57,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:57,448 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:57,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 17:26:57,448 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1123136249, now seen corresponding path program 1 times [2022-07-19 17:26:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269269499] [2022-07-19 17:26:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 17:26:57,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:57,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269269499] [2022-07-19 17:26:57,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269269499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:57,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:57,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 17:26:57,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389026951] [2022-07-19 17:26:57,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:57,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 17:26:57,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 17:26:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:26:57,568 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 17:26:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:57,622 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-07-19 17:26:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 17:26:57,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-07-19 17:26:57,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:57,623 INFO L225 Difference]: With dead ends: 27 [2022-07-19 17:26:57,623 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 17:26:57,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-19 17:26:57,624 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:57,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:26:57,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 17:26:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 17:26:57,625 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) [2022-07-19 17:26:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 17:26:57,625 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-07-19 17:26:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:57,626 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 17:26:57,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 17:26:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 17:26:57,626 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 17:26:57,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 17:26:57,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 17:26:57,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 17:26:57,661 INFO L899 garLoopResultBuilder]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2022-07-19 17:26:57,661 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= 1 gcd_~y1) (<= (+ gcd_~y1 1) gcd_~y2) (= gcd_~y1 |gcd_#in~y1|)) [2022-07-19 17:26:57,661 INFO L899 garLoopResultBuilder]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2022-07-19 17:26:57,661 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= (+ gcd_~y2 1) gcd_~y1)) [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point L24(lines 24 26) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L902 garLoopResultBuilder]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point L21(lines 21 23) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 34) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-19 17:26:57,662 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2022-07-19 17:26:57,663 INFO L902 garLoopResultBuilder]: At program point L43(lines 30 45) the Hoare annotation is: true [2022-07-19 17:26:57,663 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2022-07-19 17:26:57,663 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 44) no Hoare annotation was computed. [2022-07-19 17:26:57,663 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~m~0#1|) (<= 1 |ULTIMATE.start_main_~n~0#1|)) [2022-07-19 17:26:57,663 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2022-07-19 17:26:57,663 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2022-07-19 17:26:57,665 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:57,666 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 17:26:57,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 05:26:57 BoogieIcfgContainer [2022-07-19 17:26:57,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 17:26:57,672 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 17:26:57,672 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 17:26:57,672 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 17:26:57,672 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:26:55" (3/4) ... [2022-07-19 17:26:57,674 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 17:26:57,678 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2022-07-19 17:26:57,680 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-19 17:26:57,680 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-07-19 17:26:57,680 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 17:26:57,681 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 17:26:57,699 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 17:26:57,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 17:26:57,699 INFO L158 Benchmark]: Toolchain (without parser) took 2692.93ms. Allocated memory is still 127.9MB. Free memory was 97.7MB in the beginning and 77.6MB in the end (delta: 20.1MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. [2022-07-19 17:26:57,699 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 86.0MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 40.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:26:57,699 INFO L158 Benchmark]: CACSL2BoogieTranslator took 304.52ms. Allocated memory is still 127.9MB. Free memory was 97.7MB in the beginning and 105.0MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 17:26:57,700 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.71ms. Allocated memory is still 127.9MB. Free memory was 105.0MB in the beginning and 103.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 17:26:57,700 INFO L158 Benchmark]: Boogie Preprocessor took 27.41ms. Allocated memory is still 127.9MB. Free memory was 103.8MB in the beginning and 102.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:26:57,700 INFO L158 Benchmark]: RCFGBuilder took 293.77ms. Allocated memory is still 127.9MB. Free memory was 102.8MB in the beginning and 92.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 17:26:57,700 INFO L158 Benchmark]: TraceAbstraction took 1987.65ms. Allocated memory is still 127.9MB. Free memory was 92.4MB in the beginning and 79.7MB in the end (delta: 12.8MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2022-07-19 17:26:57,700 INFO L158 Benchmark]: Witness Printer took 26.82ms. Allocated memory is still 127.9MB. Free memory was 79.7MB in the beginning and 77.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 17:26:57,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 86.0MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 40.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 304.52ms. Allocated memory is still 127.9MB. Free memory was 97.7MB in the beginning and 105.0MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.71ms. Allocated memory is still 127.9MB. Free memory was 105.0MB in the beginning and 103.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.41ms. Allocated memory is still 127.9MB. Free memory was 103.8MB in the beginning and 102.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 293.77ms. Allocated memory is still 127.9MB. Free memory was 102.8MB in the beginning and 92.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1987.65ms. Allocated memory is still 127.9MB. Free memory was 92.4MB in the beginning and 79.7MB in the end (delta: 12.8MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. * Witness Printer took 26.82ms. Allocated memory is still 127.9MB. Free memory was 79.7MB in the beginning and 77.6MB in the end (delta: 2.1MB). 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 - PositiveResult [Line: 41]: 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 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 111 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 94 mSDsluCounter, 420 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 307 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 356 IncrementalHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 113 mSDtfsCounter, 356 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 14 NumberOfFragments, 39 HoareAnnotationTreeSize, 11 FomulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 290 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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: 30]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-19 17:26:57,734 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