./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/recHanoi03-2.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_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/recHanoi03-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/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 f30ad67ccdaa679199b144fc55a3359f87c5bd3e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:14:53,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:14:53,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:14:53,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:14:53,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:14:53,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:14:53,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:14:53,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:14:53,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:14:53,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:14:53,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:14:53,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:14:53,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:14:53,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:14:53,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:14:53,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:14:53,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:14:53,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:14:53,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:14:53,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:14:53,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:14:53,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:14:53,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:14:53,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:14:53,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:14:53,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:14:53,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:14:53,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:14:53,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:14:53,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:14:53,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:14:53,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:14:53,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:14:53,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:14:53,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:14:53,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:14:53,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:14:53,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:14:53,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:14:53,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:14:53,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:14:53,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:14:53,548 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:14:53,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:14:53,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:14:53,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:14:53,551 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:14:53,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:14:53,551 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:14:53,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:14:53,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:14:53,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:14:53,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:14:53,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:14:53,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:14:53,554 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:14:53,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:14:53,555 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:14:53,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:14:53,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:14:53,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:14:53,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:14:53,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:14:53,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:14:53,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:14:53,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:14:53,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:14:53,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:14:53,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:14:53,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:14:53,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:14:53,558 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_5a492b61-0876-4bbb-abf6-9fcd4669fc56/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f30ad67ccdaa679199b144fc55a3359f87c5bd3e [2020-11-29 22:14:53,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:14:53,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:14:53,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:14:53,878 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:14:53,878 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:14:53,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/../../sv-benchmarks/c/recursive/recHanoi03-2.c [2020-11-29 22:14:53,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/data/135433988/f80e35dde17d43058915b4e7ddd06a16/FLAG99c5bc467 [2020-11-29 22:14:54,453 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:14:54,454 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/sv-benchmarks/c/recursive/recHanoi03-2.c [2020-11-29 22:14:54,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/data/135433988/f80e35dde17d43058915b4e7ddd06a16/FLAG99c5bc467 [2020-11-29 22:14:54,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/data/135433988/f80e35dde17d43058915b4e7ddd06a16 [2020-11-29 22:14:54,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:14:54,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:14:54,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:14:54,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:14:54,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:14:54,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:14:54" (1/1) ... [2020-11-29 22:14:54,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f2716f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:54, skipping insertion in model container [2020-11-29 22:14:54,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:14:54" (1/1) ... [2020-11-29 22:14:54,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:14:54,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:14:55,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:14:55,058 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:14:55,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:14:55,087 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:14:55,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55 WrapperNode [2020-11-29 22:14:55,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:14:55,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:14:55,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:14:55,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:14:55,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... [2020-11-29 22:14:55,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... [2020-11-29 22:14:55,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:14:55,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:14:55,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:14:55,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:14:55,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... [2020-11-29 22:14:55,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... [2020-11-29 22:14:55,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... [2020-11-29 22:14:55,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... [2020-11-29 22:14:55,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... [2020-11-29 22:14:55,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... [2020-11-29 22:14:55,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... [2020-11-29 22:14:55,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:14:55,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:14:55,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:14:55,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:14:55,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/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 [2020-11-29 22:14:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-11-29 22:14:55,218 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-11-29 22:14:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:14:55,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:14:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:14:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:14:55,473 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:14:55,473 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 22:14:55,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:14:55 BoogieIcfgContainer [2020-11-29 22:14:55,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:14:55,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:14:55,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:14:55,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:14:55,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:14:54" (1/3) ... [2020-11-29 22:14:55,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7d5a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:14:55, skipping insertion in model container [2020-11-29 22:14:55,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:14:55" (2/3) ... [2020-11-29 22:14:55,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7d5a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:14:55, skipping insertion in model container [2020-11-29 22:14:55,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:14:55" (3/3) ... [2020-11-29 22:14:55,490 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-11-29 22:14:55,500 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:14:55,504 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 22:14:55,516 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 22:14:55,585 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:14:55,585 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:14:55,585 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:14:55,586 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:14:55,586 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:14:55,586 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:14:55,586 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:14:55,586 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:14:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-29 22:14:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:14:55,610 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:14:55,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:14:55,611 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:14:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:14:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1397741056, now seen corresponding path program 1 times [2020-11-29 22:14:55,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:14:55,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664144008] [2020-11-29 22:14:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:14:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:55,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 22:14:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:14:55,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664144008] [2020-11-29 22:14:55,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:14:55,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 22:14:55,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355133175] [2020-11-29 22:14:55,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:14:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:14:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:14:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:14:55,966 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2020-11-29 22:14:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:14:56,136 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-11-29 22:14:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:14:56,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-29 22:14:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:14:56,154 INFO L225 Difference]: With dead ends: 30 [2020-11-29 22:14:56,155 INFO L226 Difference]: Without dead ends: 16 [2020-11-29 22:14:56,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:14:56,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-29 22:14:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-29 22:14:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 22:14:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-29 22:14:56,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-11-29 22:14:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:14:56,195 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-29 22:14:56,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:14:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-29 22:14:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:14:56,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:14:56,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:14:56,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:14:56,198 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:14:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:14:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash -588624460, now seen corresponding path program 1 times [2020-11-29 22:14:56,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:14:56,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820403430] [2020-11-29 22:14:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:14:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:56,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 22:14:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:56,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 22:14:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 22:14:56,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820403430] [2020-11-29 22:14:56,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814888747] [2020-11-29 22:14:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:14:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:56,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:14:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:14:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 22:14:56,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:14:56,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-11-29 22:14:56,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588931549] [2020-11-29 22:14:56,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:14:56,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:14:56,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:14:56,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:14:56,800 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 14 states. [2020-11-29 22:14:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:14:56,943 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-11-29 22:14:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:14:56,946 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-29 22:14:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:14:56,947 INFO L225 Difference]: With dead ends: 23 [2020-11-29 22:14:56,947 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 22:14:56,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:14:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 22:14:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-29 22:14:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-29 22:14:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-11-29 22:14:56,959 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-11-29 22:14:56,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:14:56,961 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-11-29 22:14:56,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:14:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-11-29 22:14:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 22:14:56,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:14:56,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:14:57,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 22:14:57,186 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:14:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:14:57,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1786431680, now seen corresponding path program 2 times [2020-11-29 22:14:57,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:14:57,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156383806] [2020-11-29 22:14:57,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:14:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:57,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 22:14:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:57,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 22:14:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:57,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 22:14:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 22:14:57,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156383806] [2020-11-29 22:14:57,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534950983] [2020-11-29 22:14:57,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:14:57,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:14:57,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:14:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 22:14:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:14:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 22:14:57,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:14:57,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-11-29 22:14:57,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135676314] [2020-11-29 22:14:57,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 22:14:57,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:14:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 22:14:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:14:57,880 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2020-11-29 22:14:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:14:58,204 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-11-29 22:14:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 22:14:58,205 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-11-29 22:14:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:14:58,206 INFO L225 Difference]: With dead ends: 31 [2020-11-29 22:14:58,206 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 22:14:58,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-11-29 22:14:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 22:14:58,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-29 22:14:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 22:14:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-29 22:14:58,213 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2020-11-29 22:14:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:14:58,214 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-29 22:14:58,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 22:14:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-29 22:14:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 22:14:58,215 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:14:58,215 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:14:58,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:14:58,416 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:14:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:14:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash -669566080, now seen corresponding path program 3 times [2020-11-29 22:14:58,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:14:58,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888484969] [2020-11-29 22:14:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:14:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:58,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 22:14:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:58,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 22:14:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:58,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 22:14:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:58,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 22:14:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:58,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 22:14:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:14:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 22:14:58,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888484969] [2020-11-29 22:14:58,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55858301] [2020-11-29 22:14:58,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:14:58,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 22:14:58,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:14:58,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 22:14:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:14:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 22:14:59,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:14:59,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 26 [2020-11-29 22:14:59,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125731430] [2020-11-29 22:14:59,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:14:59,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:14:59,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:14:59,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-11-29 22:14:59,731 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 14 states. [2020-11-29 22:14:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:14:59,812 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-29 22:14:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 22:14:59,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-11-29 22:14:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:14:59,814 INFO L225 Difference]: With dead ends: 25 [2020-11-29 22:14:59,814 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 22:14:59,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-11-29 22:14:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 22:14:59,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 22:14:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 22:14:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 22:14:59,816 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-11-29 22:14:59,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:14:59,816 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:14:59,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:14:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 22:14:59,817 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 22:15:00,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:15:00,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 22:15:00,042 INFO L274 CegarLoopResult]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2020-11-29 22:15:00,042 INFO L277 CegarLoopResult]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2020-11-29 22:15:00,042 INFO L274 CegarLoopResult]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2020-11-29 22:15:00,042 INFO L270 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2020-11-29 22:15:00,043 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-11-29 22:15:00,043 INFO L274 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-11-29 22:15:00,043 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 22:15:00,043 INFO L274 CegarLoopResult]: For program point L32(lines 32 36) no Hoare annotation was computed. [2020-11-29 22:15:00,043 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 22:15:00,043 INFO L270 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (<= ULTIMATE.start_main_~n~0 31) [2020-11-29 22:15:00,043 INFO L274 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-11-29 22:15:00,043 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 22:15:00,043 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 22:15:00,044 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-11-29 22:15:00,044 INFO L277 CegarLoopResult]: At program point L26(lines 26 37) the Hoare annotation is: true [2020-11-29 22:15:00,044 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 22:15:00,044 INFO L274 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-11-29 22:15:00,044 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 22:15:00,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:15:00 BoogieIcfgContainer [2020-11-29 22:15:00,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:15:00,057 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:15:00,057 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:15:00,057 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:15:00,058 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:14:55" (3/4) ... [2020-11-29 22:15:00,061 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 22:15:00,067 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2020-11-29 22:15:00,073 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 22:15:00,074 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 22:15:00,074 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:15:00,074 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:15:00,131 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5a492b61-0876-4bbb-abf6-9fcd4669fc56/bin/uautomizer/witness.graphml [2020-11-29 22:15:00,131 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:15:00,133 INFO L168 Benchmark]: Toolchain (without parser) took 5295.90 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 79.1 MB in the beginning and 66.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:00,134 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 71.3 MB. Free memory was 30.0 MB in the beginning and 30.0 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:15:00,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.99 ms. Allocated memory is still 111.1 MB. Free memory was 78.9 MB in the beginning and 88.7 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:00,136 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.89 ms. Allocated memory is still 111.1 MB. Free memory was 88.7 MB in the beginning and 87.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:15:00,136 INFO L168 Benchmark]: Boogie Preprocessor took 19.16 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 86.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:00,137 INFO L168 Benchmark]: RCFGBuilder took 339.82 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 74.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:00,143 INFO L168 Benchmark]: TraceAbstraction took 4574.38 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 74.6 MB in the beginning and 68.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:00,144 INFO L168 Benchmark]: Witness Printer took 74.48 ms. Allocated memory is still 142.6 MB. Free memory was 68.6 MB in the beginning and 66.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:15:00,148 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 71.3 MB. Free memory was 30.0 MB in the beginning and 30.0 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 247.99 ms. Allocated memory is still 111.1 MB. Free memory was 78.9 MB in the beginning and 88.7 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.89 ms. Allocated memory is still 111.1 MB. Free memory was 88.7 MB in the beginning and 87.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.16 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 86.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 339.82 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 74.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4574.38 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 74.6 MB in the beginning and 68.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. * Witness Printer took 74.48 ms. Allocated memory is still 142.6 MB. Free memory was 68.6 MB in the beginning and 66.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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: 26]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 20 SDslu, 282 SDs, 0 SdLazy, 309 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 8 NumberOfFragments, 8 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 154 ConstructedInterpolants, 14 QuantifiedInterpolants, 24552 SizeOfPredicates, 11 NumberOfNonLiveVariables, 266 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 96/140 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...