./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer --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 d6f4e1dd3818e9d3e8c54653af66359ead501b84 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:56:20,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:56:20,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:56:20,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:56:20,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:56:20,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:56:20,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:56:20,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:56:20,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:56:20,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:56:20,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:56:20,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:56:20,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:56:20,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:56:20,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:56:20,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:56:20,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:56:20,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:56:20,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:56:20,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:56:20,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:56:20,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:56:20,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:56:20,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:56:20,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:56:20,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:56:20,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:56:20,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:56:20,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:56:20,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:56:20,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:56:20,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:56:20,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:56:20,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:56:20,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:56:20,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:56:20,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:56:20,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:56:20,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:56:20,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:56:20,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:56:20,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:56:20,671 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:56:20,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:56:20,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:56:20,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:56:20,674 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:56:20,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:56:20,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:56:20,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:56:20,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:56:20,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:56:20,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:56:20,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:56:20,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:56:20,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:56:20,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:56:20,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:56:20,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:56:20,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:56:20,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:56:20,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:56:20,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:56:20,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:56:20,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:56:20,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:56:20,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:56:20,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:56:20,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:56:20,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:56:20,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:56:20,683 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:/tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6f4e1dd3818e9d3e8c54653af66359ead501b84 [2020-11-28 02:56:20,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:56:21,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:56:21,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:56:21,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:56:21,021 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:56:21,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/../../sv-benchmarks/c/recursive/gcd01-1.c [2020-11-28 02:56:21,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/data/11a2773b2/f2b5842d60f24321ba57f81ae66c6ca2/FLAG9f53f972a [2020-11-28 02:56:21,583 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:56:21,584 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/sv-benchmarks/c/recursive/gcd01-1.c [2020-11-28 02:56:21,590 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/data/11a2773b2/f2b5842d60f24321ba57f81ae66c6ca2/FLAG9f53f972a [2020-11-28 02:56:21,962 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/data/11a2773b2/f2b5842d60f24321ba57f81ae66c6ca2 [2020-11-28 02:56:21,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:56:21,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:56:21,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:56:21,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:56:21,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:56:21,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:21" (1/1) ... [2020-11-28 02:56:21,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7d7bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:21, skipping insertion in model container [2020-11-28 02:56:21,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:21" (1/1) ... [2020-11-28 02:56:21,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:56:21,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:56:22,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:56:22,188 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:56:22,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:56:22,218 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:56:22,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22 WrapperNode [2020-11-28 02:56:22,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:56:22,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:56:22,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:56:22,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:56:22,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:56:22,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:56:22,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:56:22,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:56:22,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:56:22,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:56:22,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:56:22,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:56:22,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:56:22,375 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-11-28 02:56:22,375 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-11-28 02:56:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:56:22,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:56:22,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:56:22,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:56:22,650 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:56:22,651 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 02:56:22,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:22 BoogieIcfgContainer [2020-11-28 02:56:22,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:56:22,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:56:22,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:56:22,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:56:22,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:56:21" (1/3) ... [2020-11-28 02:56:22,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2224864a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:56:22, skipping insertion in model container [2020-11-28 02:56:22,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (2/3) ... [2020-11-28 02:56:22,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2224864a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:56:22, skipping insertion in model container [2020-11-28 02:56:22,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:22" (3/3) ... [2020-11-28 02:56:22,663 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-11-28 02:56:22,675 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:56:22,679 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:56:22,694 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:56:22,720 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:56:22,720 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:56:22,720 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:56:22,720 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:56:22,721 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:56:22,721 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:56:22,721 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:56:22,721 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:56:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-28 02:56:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:56:22,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:22,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:22,747 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:22,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1506790189, now seen corresponding path program 1 times [2020-11-28 02:56:22,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:22,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958055820] [2020-11-28 02:56:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:23,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958055820] [2020-11-28 02:56:23,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:23,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 02:56:23,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506007997] [2020-11-28 02:56:23,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:56:23,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:23,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:56:23,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:56:23,221 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-11-28 02:56:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:23,376 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-11-28 02:56:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:56:23,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-28 02:56:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:23,394 INFO L225 Difference]: With dead ends: 38 [2020-11-28 02:56:23,394 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 02:56:23,399 INFO L677 BasicCegarLoop]: 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 [2020-11-28 02:56:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 02:56:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-28 02:56:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 02:56:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-11-28 02:56:23,448 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2020-11-28 02:56:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:23,449 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-11-28 02:56:23,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:56:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-11-28 02:56:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 02:56:23,451 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:23,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:23,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:56:23,453 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1104519975, now seen corresponding path program 1 times [2020-11-28 02:56:23,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:23,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256152357] [2020-11-28 02:56:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:23,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256152357] [2020-11-28 02:56:23,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:23,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 02:56:23,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157112204] [2020-11-28 02:56:23,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:56:23,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:56:23,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:56:23,671 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 6 states. [2020-11-28 02:56:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:23,772 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-11-28 02:56:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:56:23,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-28 02:56:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:23,774 INFO L225 Difference]: With dead ends: 27 [2020-11-28 02:56:23,775 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 02:56:23,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:56:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 02:56:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-11-28 02:56:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 02:56:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-11-28 02:56:23,782 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2020-11-28 02:56:23,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:23,783 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-11-28 02:56:23,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:56:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-11-28 02:56:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:56:23,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:23,784 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:23,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:56:23,785 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:23,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1653337583, now seen corresponding path program 1 times [2020-11-28 02:56:23,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:23,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491203199] [2020-11-28 02:56:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:56:23,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491203199] [2020-11-28 02:56:23,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:23,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 02:56:23,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634989368] [2020-11-28 02:56:23,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:56:23,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:56:23,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:56:23,918 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 6 states. [2020-11-28 02:56:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:24,107 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2020-11-28 02:56:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:56:24,109 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-28 02:56:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:24,110 INFO L225 Difference]: With dead ends: 33 [2020-11-28 02:56:24,110 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 02:56:24,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:56:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 02:56:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-11-28 02:56:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 02:56:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-11-28 02:56:24,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2020-11-28 02:56:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:24,126 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-11-28 02:56:24,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:56:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-11-28 02:56:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:56:24,129 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:24,129 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:24,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:56:24,130 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:24,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1295869967, now seen corresponding path program 1 times [2020-11-28 02:56:24,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:24,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280951246] [2020-11-28 02:56:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:56:24,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280951246] [2020-11-28 02:56:24,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:24,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-28 02:56:24,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870175742] [2020-11-28 02:56:24,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:56:24,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:56:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:56:24,308 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2020-11-28 02:56:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:24,511 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-28 02:56:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:56:24,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-11-28 02:56:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:24,514 INFO L225 Difference]: With dead ends: 33 [2020-11-28 02:56:24,514 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 02:56:24,514 INFO L677 BasicCegarLoop]: 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 [2020-11-28 02:56:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 02:56:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-11-28 02:56:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 02:56:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-11-28 02:56:24,520 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 20 [2020-11-28 02:56:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:24,521 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-11-28 02:56:24,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:56:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-11-28 02:56:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 02:56:24,522 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:24,522 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:24,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 02:56:24,522 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:24,526 INFO L82 PathProgramCache]: Analyzing trace with hash 204602807, now seen corresponding path program 1 times [2020-11-28 02:56:24,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:24,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270585473] [2020-11-28 02:56:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 02:56:24,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270585473] [2020-11-28 02:56:24,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:24,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-28 02:56:24,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944765293] [2020-11-28 02:56:24,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:56:24,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:24,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:56:24,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:56:24,658 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-11-28 02:56:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:24,727 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-28 02:56:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:56:24,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-28 02:56:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:24,728 INFO L225 Difference]: With dead ends: 28 [2020-11-28 02:56:24,729 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 02:56:24,729 INFO L677 BasicCegarLoop]: 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 [2020-11-28 02:56:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 02:56:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-11-28 02:56:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 02:56:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-28 02:56:24,735 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 21 [2020-11-28 02:56:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:24,735 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-28 02:56:24,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:56:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-28 02:56:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 02:56:24,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:24,745 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:24,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 02:56:24,746 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:24,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1443454039, now seen corresponding path program 1 times [2020-11-28 02:56:24,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:24,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714782041] [2020-11-28 02:56:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 02:56:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714782041] [2020-11-28 02:56:24,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:24,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-28 02:56:24,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076627829] [2020-11-28 02:56:24,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:56:24,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:24,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:56:24,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:56:24,857 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-11-28 02:56:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:24,935 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-11-28 02:56:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:56:24,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-28 02:56:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:24,937 INFO L225 Difference]: With dead ends: 31 [2020-11-28 02:56:24,937 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 02:56:24,938 INFO L677 BasicCegarLoop]: 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 [2020-11-28 02:56:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 02:56:24,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 02:56:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 02:56:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-11-28 02:56:24,948 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2020-11-28 02:56:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:24,949 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-11-28 02:56:24,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:56:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-11-28 02:56:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 02:56:24,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:24,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:24,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 02:56:24,953 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:24,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1698059833, now seen corresponding path program 1 times [2020-11-28 02:56:24,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:24,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725696038] [2020-11-28 02:56:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:25,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:25,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:25,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 02:56:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 02:56:25,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725696038] [2020-11-28 02:56:25,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:25,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-28 02:56:25,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280551647] [2020-11-28 02:56:25,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:56:25,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:25,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:56:25,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:56:25,106 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 8 states. [2020-11-28 02:56:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:25,224 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-11-28 02:56:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:56:25,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-11-28 02:56:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:25,226 INFO L225 Difference]: With dead ends: 27 [2020-11-28 02:56:25,226 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 02:56:25,227 INFO L677 BasicCegarLoop]: 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 [2020-11-28 02:56:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 02:56:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 02:56:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 02:56:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 02:56:25,228 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-11-28 02:56:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:25,228 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:56:25,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:56:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 02:56:25,228 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 02:56:25,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 02:56:25,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 02:56:25,309 INFO L274 CegarLoopResult]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2020-11-28 02:56:25,309 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-11-28 02:56:25,310 INFO L274 CegarLoopResult]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2020-11-28 02:56:25,310 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-11-28 02:56:25,310 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-11-28 02:56:25,310 INFO L274 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-11-28 02:56:25,310 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-28 02:56:25,310 INFO L277 CegarLoopResult]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2020-11-28 02:56:25,310 INFO L274 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-11-28 02:56:25,310 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-28 02:56:25,311 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 02:56:25,311 INFO L274 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-11-28 02:56:25,311 INFO L274 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2020-11-28 02:56:25,311 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-28 02:56:25,311 INFO L274 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-11-28 02:56:25,311 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 02:56:25,311 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 02:56:25,311 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 02:56:25,312 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 02:56:25,312 INFO L277 CegarLoopResult]: At program point L43(lines 30 45) the Hoare annotation is: true [2020-11-28 02:56:25,312 INFO L274 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-11-28 02:56:25,312 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start_main_~m~0)) [2020-11-28 02:56:25,312 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-11-28 02:56:25,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:56:25 BoogieIcfgContainer [2020-11-28 02:56:25,322 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:56:25,322 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:56:25,322 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:56:25,322 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:56:25,323 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:22" (3/4) ... [2020-11-28 02:56:25,326 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 02:56:25,333 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2020-11-28 02:56:25,338 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 02:56:25,338 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-28 02:56:25,338 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 02:56:25,338 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 02:56:25,386 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0ad0d6b5-4d13-4ec2-af12-9421976af382/bin/uautomizer/witness.graphml [2020-11-28 02:56:25,396 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:56:25,398 INFO L168 Benchmark]: Toolchain (without parser) took 3432.20 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 83.6 MB in the beginning and 99.0 MB in the end (delta: -15.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:25,399 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory was 53.0 MB in the beginning and 52.9 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:56:25,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.09 ms. Allocated memory is still 115.3 MB. Free memory was 83.6 MB in the beginning and 92.4 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:25,401 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.54 ms. Allocated memory is still 115.3 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:25,402 INFO L168 Benchmark]: Boogie Preprocessor took 29.03 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 90.4 MB in the end (delta: 586.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:56:25,402 INFO L168 Benchmark]: RCFGBuilder took 360.60 ms. Allocated memory is still 115.3 MB. Free memory was 90.4 MB in the beginning and 77.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:25,403 INFO L168 Benchmark]: TraceAbstraction took 2666.85 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 76.3 MB in the beginning and 102.2 MB in the end (delta: -25.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:56:25,403 INFO L168 Benchmark]: Witness Printer took 74.21 ms. Allocated memory is still 138.4 MB. Free memory was 102.2 MB in the beginning and 99.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:25,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory was 53.0 MB in the beginning and 52.9 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 251.09 ms. Allocated memory is still 115.3 MB. Free memory was 83.6 MB in the beginning and 92.4 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.54 ms. Allocated memory is still 115.3 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.03 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 90.4 MB in the end (delta: 586.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 360.60 ms. Allocated memory is still 115.3 MB. Free memory was 90.4 MB in the beginning and 77.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2666.85 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 76.3 MB in the beginning and 102.2 MB in the end (delta: -25.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 74.21 ms. Allocated memory is still 138.4 MB. Free memory was 102.2 MB in the beginning and 99.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 93 SDslu, 376 SDs, 0 SdLazy, 281 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 14 NumberOfFragments, 37 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 5550 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...