./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU --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 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:43:57,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:43:57,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:43:57,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:43:57,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:43:57,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:43:57,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:43:57,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:43:57,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:43:57,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:43:57,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:43:57,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:43:57,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:43:57,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:43:57,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:43:57,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:43:57,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:43:57,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:43:57,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:43:57,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:43:57,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:43:57,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:43:57,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:43:57,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:43:57,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:43:57,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:43:57,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:43:57,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:43:57,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:43:57,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:43:57,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:43:57,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:43:57,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:43:57,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:43:57,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:43:57,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:43:57,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:43:57,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:43:57,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:43:57,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:43:57,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:43:57,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:43:57,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:43:57,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:43:57,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:43:57,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:43:57,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:43:57,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:43:57,608 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:43:57,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:43:57,608 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:43:57,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:43:57,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:43:57,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:43:57,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:43:57,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:43:57,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:43:57,610 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:43:57,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:43:57,610 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:43:57,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:43:57,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:43:57,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:43:57,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:43:57,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:43:57,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:43:57,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:43:57,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:43:57,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:43:57,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:43:57,613 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:43:57,613 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:43:57,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:43:57,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:43:57,613 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_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a [2021-11-02 22:43:57,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:43:57,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:43:57,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:43:57,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:43:57,980 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:43:57,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2021-11-02 22:43:58,062 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/data/1b356ad12/04f3501360de4da8ac4946f3ac93b5a2/FLAGfac4795b2 [2021-11-02 22:43:58,552 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:43:58,553 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2021-11-02 22:43:58,569 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/data/1b356ad12/04f3501360de4da8ac4946f3ac93b5a2/FLAGfac4795b2 [2021-11-02 22:43:58,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/data/1b356ad12/04f3501360de4da8ac4946f3ac93b5a2 [2021-11-02 22:43:58,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:43:58,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:43:58,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:43:58,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:43:58,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:43:58,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:43:58" (1/1) ... [2021-11-02 22:43:58,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21c28993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:58, skipping insertion in model container [2021-11-02 22:43:58,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:43:58" (1/1) ... [2021-11-02 22:43:58,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:43:58,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:43:59,158 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2021-11-02 22:43:59,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:43:59,180 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:43:59,196 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2021-11-02 22:43:59,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:43:59,217 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:43:59,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59 WrapperNode [2021-11-02 22:43:59,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:43:59,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:43:59,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:43:59,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:43:59,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:43:59,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:43:59,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:43:59,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:43:59,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:43:59,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:43:59,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:43:59,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:43:59,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (1/1) ... [2021-11-02 22:43:59,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:43:59,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:59,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:43:59,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:43:59,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:43:59,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:43:59,381 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-11-02 22:43:59,381 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-11-02 22:43:59,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:43:59,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:43:59,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:43:59,562 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 22:43:59,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:43:59 BoogieIcfgContainer [2021-11-02 22:43:59,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:43:59,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:43:59,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:43:59,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:43:59,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:43:58" (1/3) ... [2021-11-02 22:43:59,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7654b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:43:59, skipping insertion in model container [2021-11-02 22:43:59,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:59" (2/3) ... [2021-11-02 22:43:59,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7654b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:43:59, skipping insertion in model container [2021-11-02 22:43:59,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:43:59" (3/3) ... [2021-11-02 22:43:59,572 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2021-11-02 22:43:59,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:43:59,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:43:59,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:43:59,634 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:43:59,634 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:43:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:43:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:43:59,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:59,657 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:59,658 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-11-02 22:43:59,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:59,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572310270] [2021-11-02 22:43:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:59,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:59,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:43:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:59,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:59,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572310270] [2021-11-02 22:43:59,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572310270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:43:59,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:43:59,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:43:59,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012678154] [2021-11-02 22:43:59,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:43:59,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:59,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:43:59,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:43:59,996 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:44:00,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:00,112 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-02 22:44:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:44:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 22:44:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:00,131 INFO L225 Difference]: With dead ends: 25 [2021-11-02 22:44:00,131 INFO L226 Difference]: Without dead ends: 15 [2021-11-02 22:44:00,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:44:00,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-02 22:44:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-02 22:44:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:44:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-02 22:44:00,173 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-11-02 22:44:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:00,173 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-02 22:44:00,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:44:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-02 22:44:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:44:00,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:00,176 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:00,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:44:00,176 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-11-02 22:44:00,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:00,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108316814] [2021-11-02 22:44:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:00,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:00,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:00,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:44:00,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:00,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108316814] [2021-11-02 22:44:00,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108316814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:00,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604923936] [2021-11-02 22:44:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:00,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:00,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:00,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:00,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:44:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:00,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:44:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:44:00,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604923936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:00,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:00,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 22:44:00,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596303989] [2021-11-02 22:44:00,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:44:00,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:00,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:44:00,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:44:00,672 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:44:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:00,753 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-02 22:44:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:44:00,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-11-02 22:44:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:00,755 INFO L225 Difference]: With dead ends: 22 [2021-11-02 22:44:00,756 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 22:44:00,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:44:00,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 22:44:00,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-02 22:44:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-02 22:44:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-02 22:44:00,770 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-11-02 22:44:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:00,774 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-02 22:44:00,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:44:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-02 22:44:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:44:00,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:00,779 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:00,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:00,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:00,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-11-02 22:44:00,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:00,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697975977] [2021-11-02 22:44:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:00,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:01,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:01,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:01,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:44:01,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:01,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697975977] [2021-11-02 22:44:01,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697975977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:01,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989607328] [2021-11-02 22:44:01,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:44:01,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:01,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:01,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:01,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:44:01,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:44:01,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:44:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:44:01,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989607328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:01,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:01,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 22:44:01,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399217688] [2021-11-02 22:44:01,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:44:01,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:01,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:44:01,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:44:01,401 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 22:44:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:01,462 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-02 22:44:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:44:01,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-11-02 22:44:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:01,464 INFO L225 Difference]: With dead ends: 25 [2021-11-02 22:44:01,464 INFO L226 Difference]: Without dead ends: 21 [2021-11-02 22:44:01,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:44:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-02 22:44:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-02 22:44:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 22:44:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-02 22:44:01,472 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-11-02 22:44:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:01,473 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-02 22:44:01,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 22:44:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-02 22:44:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:44:01,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:01,475 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:01,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:01,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:01,702 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-11-02 22:44:01,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:01,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271892506] [2021-11-02 22:44:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:01,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:01,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:01,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:01,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:01,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 22:44:01,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:01,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271892506] [2021-11-02 22:44:01,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271892506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:01,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356502066] [2021-11-02 22:44:01,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:44:01,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:01,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:01,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:01,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:44:02,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:44:02,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:44:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 22:44:02,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356502066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:02,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:02,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 22:44:02,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693808099] [2021-11-02 22:44:02,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:44:02,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:02,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:44:02,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:44:02,182 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-02 22:44:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:02,247 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-02 22:44:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:44:02,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 28 [2021-11-02 22:44:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:02,249 INFO L225 Difference]: With dead ends: 28 [2021-11-02 22:44:02,249 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 22:44:02,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:44:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 22:44:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-02 22:44:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-02 22:44:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-02 22:44:02,261 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-11-02 22:44:02,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:02,261 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-02 22:44:02,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-02 22:44:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-02 22:44:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:44:02,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:02,270 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:02,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:02,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:02,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:02,472 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-11-02 22:44:02,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:02,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145156199] [2021-11-02 22:44:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:02,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:02,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:02,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:02,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:02,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:02,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-02 22:44:02,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:02,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145156199] [2021-11-02 22:44:02,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145156199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:02,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741342269] [2021-11-02 22:44:02,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:44:02,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:02,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:02,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:44:02,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:44:02,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:02,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:44:02,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-02 22:44:03,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741342269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:03,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:03,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 22:44:03,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846929495] [2021-11-02 22:44:03,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:44:03,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:44:03,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:44:03,010 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-02 22:44:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:03,090 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-02 22:44:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:44:03,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-11-02 22:44:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:03,093 INFO L225 Difference]: With dead ends: 31 [2021-11-02 22:44:03,093 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 22:44:03,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:44:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 22:44:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-02 22:44:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-02 22:44:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-02 22:44:03,111 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-11-02 22:44:03,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:03,112 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-02 22:44:03,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-02 22:44:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-02 22:44:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:44:03,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:03,116 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:03,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:03,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:03,342 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:03,342 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-11-02 22:44:03,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:03,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305679677] [2021-11-02 22:44:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:03,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:03,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:03,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:03,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:03,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:03,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:03,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:44:03,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:03,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305679677] [2021-11-02 22:44:03,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305679677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:03,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408128786] [2021-11-02 22:44:03,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:44:03,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:03,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:03,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:03,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:44:03,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:44:03,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:03,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:44:03,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-02 22:44:03,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408128786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:03,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:03,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 22:44:03,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893893539] [2021-11-02 22:44:03,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:44:03,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:44:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:44:03,905 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-02 22:44:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:03,996 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-02 22:44:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:44:03,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-11-02 22:44:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:03,998 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:44:03,998 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 22:44:03,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:44:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 22:44:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-02 22:44:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-02 22:44:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-02 22:44:04,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-11-02 22:44:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:04,006 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-02 22:44:04,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-02 22:44:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-02 22:44:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:44:04,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:04,008 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:04,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:04,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:04,234 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-11-02 22:44:04,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:04,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919873621] [2021-11-02 22:44:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:04,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:04,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:04,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:04,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:04,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:04,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:04,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:04,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:44:04,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:04,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919873621] [2021-11-02 22:44:04,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919873621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:04,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473857320] [2021-11-02 22:44:04,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:44:04,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:04,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:04,546 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:04,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:44:04,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 22:44:04,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:04,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:44:04,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:44:04,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473857320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:04,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:04,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 22:44:04,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534476571] [2021-11-02 22:44:04,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:44:04,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:04,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:44:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:44:04,862 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-02 22:44:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:04,963 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-02 22:44:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:44:04,964 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) Word has length 46 [2021-11-02 22:44:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:04,965 INFO L225 Difference]: With dead ends: 37 [2021-11-02 22:44:04,965 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 22:44:04,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:44:04,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 22:44:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-02 22:44:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-02 22:44:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-02 22:44:04,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-11-02 22:44:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:04,972 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-02 22:44:04,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-02 22:44:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-02 22:44:04,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:44:04,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:04,975 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:05,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:05,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:44:05,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-11-02 22:44:05,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:05,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270373751] [2021-11-02 22:44:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:05,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-02 22:44:05,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:05,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270373751] [2021-11-02 22:44:05,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270373751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:05,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223543977] [2021-11-02 22:44:05,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:44:05,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:05,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:05,486 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:05,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:44:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:05,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:44:05,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-02 22:44:05,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223543977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:05,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:05,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 22:44:05,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051373895] [2021-11-02 22:44:05,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:44:05,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:44:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:44:05,866 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-02 22:44:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:05,976 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-02 22:44:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:44:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-11-02 22:44:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:05,978 INFO L225 Difference]: With dead ends: 40 [2021-11-02 22:44:05,978 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 22:44:05,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:44:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 22:44:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-02 22:44:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-02 22:44:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-02 22:44:05,986 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-11-02 22:44:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:05,986 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-02 22:44:05,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-02 22:44:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-02 22:44:05,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:44:05,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:05,988 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:06,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:06,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:06,207 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:06,207 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-11-02 22:44:06,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:06,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993669334] [2021-11-02 22:44:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:06,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 22:44:06,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:06,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993669334] [2021-11-02 22:44:06,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993669334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:06,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024392389] [2021-11-02 22:44:06,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:44:06,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:06,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:06,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:06,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:44:06,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:44:06,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:44:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 22:44:06,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024392389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:06,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:06,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 22:44:06,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017670970] [2021-11-02 22:44:06,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:44:06,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:44:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:44:06,947 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-02 22:44:07,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:07,081 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-02 22:44:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:44:07,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-11-02 22:44:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:07,083 INFO L225 Difference]: With dead ends: 43 [2021-11-02 22:44:07,084 INFO L226 Difference]: Without dead ends: 39 [2021-11-02 22:44:07,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:44:07,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-02 22:44:07,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-02 22:44:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-02 22:44:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-02 22:44:07,091 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-11-02 22:44:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:07,092 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-02 22:44:07,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-02 22:44:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-02 22:44:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:44:07,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:07,094 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:07,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:07,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:07,322 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-11-02 22:44:07,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:07,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299845269] [2021-11-02 22:44:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:07,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 22:44:07,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:07,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299845269] [2021-11-02 22:44:07,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299845269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:07,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960461408] [2021-11-02 22:44:07,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:44:07,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:07,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:07,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:07,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:44:07,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 22:44:07,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:07,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:44:07,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 22:44:08,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960461408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:08,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:08,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 22:44:08,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568669975] [2021-11-02 22:44:08,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:44:08,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:44:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:44:08,176 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-02 22:44:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:08,321 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-02 22:44:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:44:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) Word has length 64 [2021-11-02 22:44:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:08,323 INFO L225 Difference]: With dead ends: 46 [2021-11-02 22:44:08,323 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 22:44:08,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:44:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 22:44:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-02 22:44:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-02 22:44:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-02 22:44:08,330 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-11-02 22:44:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:08,331 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-02 22:44:08,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-02 22:44:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-02 22:44:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:44:08,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:08,333 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:08,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:08,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:44:08,533 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:08,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-11-02 22:44:08,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:08,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766290791] [2021-11-02 22:44:08,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:08,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-02 22:44:08,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:08,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766290791] [2021-11-02 22:44:08,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766290791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:08,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755028989] [2021-11-02 22:44:08,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:44:08,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:08,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:08,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:08,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:44:09,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:44:09,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:09,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:44:09,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-02 22:44:09,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755028989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:09,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:09,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 22:44:09,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344418238] [2021-11-02 22:44:09,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:44:09,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:09,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:44:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:44:09,439 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-02 22:44:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:09,592 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-02 22:44:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:44:09,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) Word has length 70 [2021-11-02 22:44:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:09,595 INFO L225 Difference]: With dead ends: 49 [2021-11-02 22:44:09,595 INFO L226 Difference]: Without dead ends: 45 [2021-11-02 22:44:09,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:44:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-02 22:44:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-02 22:44:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-02 22:44:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-02 22:44:09,602 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-11-02 22:44:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:09,603 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-02 22:44:09,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-02 22:44:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-02 22:44:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:44:09,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:09,605 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:09,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:09,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:09,823 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-11-02 22:44:09,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:09,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556196573] [2021-11-02 22:44:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:09,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:09,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:09,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:09,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:09,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:10,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:10,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:10,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:10,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:10,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:10,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:10,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 22:44:10,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:10,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556196573] [2021-11-02 22:44:10,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556196573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:10,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311900848] [2021-11-02 22:44:10,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:44:10,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:10,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:10,229 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:10,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:44:10,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 22:44:10,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:10,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:44:10,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 22:44:10,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311900848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:10,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:10,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 22:44:10,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680553190] [2021-11-02 22:44:10,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:44:10,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:10,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:44:10,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:44:10,807 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-02 22:44:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:10,988 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-02 22:44:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:44:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) Word has length 76 [2021-11-02 22:44:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:10,990 INFO L225 Difference]: With dead ends: 52 [2021-11-02 22:44:10,990 INFO L226 Difference]: Without dead ends: 48 [2021-11-02 22:44:10,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:44:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-02 22:44:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-02 22:44:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-02 22:44:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-02 22:44:10,998 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-11-02 22:44:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:10,998 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-02 22:44:10,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-02 22:44:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-02 22:44:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 22:44:11,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:11,000 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:11,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:11,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:11,222 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:11,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-11-02 22:44:11,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:11,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305193174] [2021-11-02 22:44:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:11,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-02 22:44:11,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:11,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305193174] [2021-11-02 22:44:11,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305193174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:11,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907873280] [2021-11-02 22:44:11,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:44:11,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:11,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:11,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:11,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:44:11,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 22:44:11,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:11,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:44:11,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-02 22:44:12,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907873280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:12,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:12,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 22:44:12,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274992093] [2021-11-02 22:44:12,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:44:12,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:44:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:44:12,339 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-02 22:44:12,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:12,493 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-11-02 22:44:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:44:12,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) Word has length 82 [2021-11-02 22:44:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:12,496 INFO L225 Difference]: With dead ends: 55 [2021-11-02 22:44:12,496 INFO L226 Difference]: Without dead ends: 51 [2021-11-02 22:44:12,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:44:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-02 22:44:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-02 22:44:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-02 22:44:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-02 22:44:12,519 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-11-02 22:44:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:12,520 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-02 22:44:12,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-02 22:44:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-02 22:44:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 22:44:12,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:12,522 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:12,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:12,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:44:12,750 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:12,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-11-02 22:44:12,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:12,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781373911] [2021-11-02 22:44:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:12,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:12,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:12,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:12,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:12,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:12,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-02 22:44:13,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:13,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781373911] [2021-11-02 22:44:13,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781373911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:13,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767566701] [2021-11-02 22:44:13,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:44:13,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:13,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:13,298 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:13,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:44:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 22:44:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-02 22:44:13,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767566701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:13,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:13,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 22:44:13,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366806710] [2021-11-02 22:44:13,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:44:13,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:44:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:44:13,890 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-02 22:44:14,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:14,076 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-02 22:44:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:44:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) Word has length 88 [2021-11-02 22:44:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:14,079 INFO L225 Difference]: With dead ends: 58 [2021-11-02 22:44:14,079 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 22:44:14,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:44:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 22:44:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-02 22:44:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-02 22:44:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-02 22:44:14,092 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-11-02 22:44:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:14,093 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-02 22:44:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-02 22:44:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-02 22:44:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 22:44:14,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:14,108 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:14,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:14,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:44:14,334 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:14,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-11-02 22:44:14,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:14,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506775121] [2021-11-02 22:44:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:14,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 22:44:14,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:14,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506775121] [2021-11-02 22:44:14,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506775121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:14,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89459274] [2021-11-02 22:44:14,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:44:14,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:14,866 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:14,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:44:15,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:44:15,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:15,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:44:15,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 22:44:15,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89459274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:15,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:15,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 22:44:15,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338382584] [2021-11-02 22:44:15,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:44:15,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:44:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:44:15,585 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-02 22:44:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:15,795 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-11-02 22:44:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:44:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) Word has length 94 [2021-11-02 22:44:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:15,797 INFO L225 Difference]: With dead ends: 61 [2021-11-02 22:44:15,797 INFO L226 Difference]: Without dead ends: 57 [2021-11-02 22:44:15,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:44:15,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-02 22:44:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-02 22:44:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-02 22:44:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-02 22:44:15,810 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-11-02 22:44:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:15,810 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-02 22:44:15,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-02 22:44:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-02 22:44:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 22:44:15,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:15,813 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:15,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:16,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:44:16,026 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:16,026 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-11-02 22:44:16,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:16,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169444271] [2021-11-02 22:44:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:16,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-02 22:44:16,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:16,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169444271] [2021-11-02 22:44:16,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169444271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:16,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034484552] [2021-11-02 22:44:16,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:44:16,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:16,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:16,682 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:16,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:44:17,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 22:44:17,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 22:44:17,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-02 22:44:17,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034484552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:17,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:17,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 22:44:17,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757252138] [2021-11-02 22:44:17,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:44:17,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:44:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:44:17,492 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-02 22:44:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:17,715 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-02 22:44:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:44:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) Word has length 100 [2021-11-02 22:44:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:17,717 INFO L225 Difference]: With dead ends: 64 [2021-11-02 22:44:17,717 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:44:17,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:44:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:44:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-02 22:44:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-02 22:44:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-11-02 22:44:17,724 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-11-02 22:44:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:17,724 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-11-02 22:44:17,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-02 22:44:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-11-02 22:44:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-02 22:44:17,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:17,726 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:17,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:17,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:44:17,950 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:17,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:17,950 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-11-02 22:44:17,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:17,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963251828] [2021-11-02 22:44:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:17,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-02 22:44:18,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:18,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963251828] [2021-11-02 22:44:18,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963251828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:18,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106381634] [2021-11-02 22:44:18,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:44:18,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:18,614 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:18,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:44:19,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:44:19,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:19,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 22:44:19,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-02 22:44:19,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106381634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:19,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:19,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 22:44:19,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937786227] [2021-11-02 22:44:19,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:44:19,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:19,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:44:19,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:44:19,545 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-02 22:44:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:19,773 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-11-02 22:44:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:44:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) Word has length 106 [2021-11-02 22:44:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:19,775 INFO L225 Difference]: With dead ends: 67 [2021-11-02 22:44:19,775 INFO L226 Difference]: Without dead ends: 63 [2021-11-02 22:44:19,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:44:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-02 22:44:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-02 22:44:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-02 22:44:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-11-02 22:44:19,780 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-11-02 22:44:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:19,781 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-11-02 22:44:19,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-02 22:44:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-11-02 22:44:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-02 22:44:19,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:19,789 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:19,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:19,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:44:19,990 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:19,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-11-02 22:44:19,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:19,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469181706] [2021-11-02 22:44:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:19,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:44:20,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:20,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469181706] [2021-11-02 22:44:20,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469181706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:20,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101530230] [2021-11-02 22:44:20,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:44:20,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:20,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:20,662 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:20,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:44:21,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 22:44:21,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 22:44:21,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 22:44:21,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101530230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:21,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:21,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 22:44:21,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237848416] [2021-11-02 22:44:21,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:44:21,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:44:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:44:21,476 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-02 22:44:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:21,721 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-02 22:44:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:44:21,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) Word has length 112 [2021-11-02 22:44:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:21,723 INFO L225 Difference]: With dead ends: 70 [2021-11-02 22:44:21,724 INFO L226 Difference]: Without dead ends: 66 [2021-11-02 22:44:21,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:44:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-02 22:44:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-02 22:44:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-02 22:44:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-02 22:44:21,730 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-11-02 22:44:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:21,731 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-02 22:44:21,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-02 22:44:21,732 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-02 22:44:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-02 22:44:21,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:21,733 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:21,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:21,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:21,934 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-11-02 22:44:21,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:21,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179886281] [2021-11-02 22:44:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:21,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-02 22:44:22,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:22,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179886281] [2021-11-02 22:44:22,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179886281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:22,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92093919] [2021-11-02 22:44:22,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:44:22,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:22,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:22,700 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:22,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:44:23,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 22:44:23,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 22:44:23,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-02 22:44:23,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92093919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:23,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:23,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 22:44:23,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758886566] [2021-11-02 22:44:23,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:44:23,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:23,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:44:23,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:44:23,670 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-02 22:44:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:23,909 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-11-02 22:44:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:44:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) Word has length 118 [2021-11-02 22:44:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:23,911 INFO L225 Difference]: With dead ends: 73 [2021-11-02 22:44:23,911 INFO L226 Difference]: Without dead ends: 69 [2021-11-02 22:44:23,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:44:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-02 22:44:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-02 22:44:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-02 22:44:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-02 22:44:23,917 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-11-02 22:44:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:23,917 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-02 22:44:23,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-02 22:44:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-02 22:44:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 22:44:23,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:23,920 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:23,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:24,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:24,136 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-11-02 22:44:24,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:24,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835943442] [2021-11-02 22:44:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:24,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-11-02 22:44:24,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:24,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835943442] [2021-11-02 22:44:24,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835943442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:24,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670764663] [2021-11-02 22:44:24,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:44:24,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:24,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:24,966 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:24,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:44:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:25,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:44:25,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-11-02 22:44:26,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670764663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:26,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:26,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 22:44:26,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953005387] [2021-11-02 22:44:26,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:44:26,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:26,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:44:26,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:44:26,025 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-02 22:44:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:26,284 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-11-02 22:44:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:44:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) Word has length 124 [2021-11-02 22:44:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:26,287 INFO L225 Difference]: With dead ends: 76 [2021-11-02 22:44:26,288 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 22:44:26,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:44:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 22:44:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-02 22:44:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-02 22:44:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-02 22:44:26,296 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-11-02 22:44:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:26,297 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-02 22:44:26,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-02 22:44:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-02 22:44:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-02 22:44:26,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:44:26,299 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:26,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:26,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:26,522 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:26,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-11-02 22:44:26,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:26,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090574867] [2021-11-02 22:44:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:26,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:26,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:26,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:27,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:27,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:27,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:27,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:27,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:27,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:27,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:27,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:44:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 589 proven. 40 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-11-02 22:44:28,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:28,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090574867] [2021-11-02 22:44:28,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090574867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:28,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246132509] [2021-11-02 22:44:28,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:44:28,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:28,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:44:28,907 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:44:28,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:44:29,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:44:29,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 177 conjunts are in the unsatisfiable core [2021-11-02 22:44:29,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2021-11-02 22:44:32,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246132509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:44:32,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:44:32,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49] total 94 [2021-11-02 22:44:32,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156631195] [2021-11-02 22:44:32,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-02 22:44:32,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:32,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-02 22:44:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=8167, Unknown=0, NotChecked=0, Total=8742 [2021-11-02 22:44:32,591 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 94 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 52 states have internal predecessors, (98), 6 states have call successors, (6), 1 states have call predecessors, (6), 41 states have return successors, (42), 42 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-02 22:44:36,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:36,655 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-11-02 22:44:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 22:44:36,656 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 52 states have internal predecessors, (98), 6 states have call successors, (6), 1 states have call predecessors, (6), 41 states have return successors, (42), 42 states have call predecessors, (42), 6 states have call successors, (42) Word has length 130 [2021-11-02 22:44:36,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:36,656 INFO L225 Difference]: With dead ends: 75 [2021-11-02 22:44:36,657 INFO L226 Difference]: Without dead ends: 0 [2021-11-02 22:44:36,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3573 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1395, Invalid=18065, Unknown=0, NotChecked=0, Total=19460 [2021-11-02 22:44:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-02 22:44:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-02 22:44:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-02 22:44:36,664 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 130 [2021-11-02 22:44:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:36,664 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-02 22:44:36,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 52 states have internal predecessors, (98), 6 states have call successors, (6), 1 states have call predecessors, (6), 41 states have return successors, (42), 42 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-02 22:44:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-02 22:44:36,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-02 22:44:36,666 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 22:44:36,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:36,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:44:36,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-02 22:44:36,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 22:44:36,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 22:44:36,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 22:44:36,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 22:44:36,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 22:44:36,900 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-02 22:44:36,900 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-02 22:44:36,900 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-02 22:44:36,900 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-02 22:44:36,900 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-11-02 22:44:36,900 INFO L857 garLoopResultBuilder]: For program point L18(line 18) no Hoare annotation was computed. [2021-11-02 22:44:36,900 INFO L857 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2021-11-02 22:44:36,900 INFO L853 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~b~0 0) (= ULTIMATE.start_main_~a~0 20)) [2021-11-02 22:44:36,901 INFO L857 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2021-11-02 22:44:36,901 INFO L857 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2021-11-02 22:44:36,901 INFO L857 garLoopResultBuilder]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2021-11-02 22:44:36,901 INFO L853 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= 1 sum_~n)) [2021-11-02 22:44:36,901 INFO L857 garLoopResultBuilder]: For program point L9-1(line 9) no Hoare annotation was computed. [2021-11-02 22:44:36,901 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 10) no Hoare annotation was computed. [2021-11-02 22:44:36,902 INFO L857 garLoopResultBuilder]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2021-11-02 22:44:36,902 INFO L860 garLoopResultBuilder]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2021-11-02 22:44:36,905 INFO L731 BasicCegarLoop]: Path program histogram: [20, 1] [2021-11-02 22:44:36,907 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:44:36,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:44:36 BoogieIcfgContainer [2021-11-02 22:44:36,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:44:36,911 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:44:36,911 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:44:36,911 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:44:36,912 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:43:59" (3/4) ... [2021-11-02 22:44:36,915 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-02 22:44:36,923 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2021-11-02 22:44:36,927 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-02 22:44:36,927 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-02 22:44:36,928 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-02 22:44:36,928 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-02 22:44:36,965 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/witness.graphml [2021-11-02 22:44:36,966 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:44:36,967 INFO L168 Benchmark]: Toolchain (without parser) took 38037.30 ms. Allocated memory was 130.0 MB in the beginning and 293.6 MB in the end (delta: 163.6 MB). Free memory was 89.5 MB in the beginning and 198.0 MB in the end (delta: -108.5 MB). Peak memory consumption was 54.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:44:36,968 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 130.0 MB. Free memory is still 105.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:44:36,968 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.68 ms. Allocated memory is still 130.0 MB. Free memory was 89.2 MB in the beginning and 103.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:44:36,969 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.65 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 102.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:44:36,969 INFO L168 Benchmark]: Boogie Preprocessor took 20.95 ms. Allocated memory is still 130.0 MB. Free memory was 102.2 MB in the beginning and 101.7 MB in the end (delta: 515.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:44:36,970 INFO L168 Benchmark]: RCFGBuilder took 279.80 ms. Allocated memory is still 130.0 MB. Free memory was 101.7 MB in the beginning and 92.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:44:36,971 INFO L168 Benchmark]: TraceAbstraction took 37345.33 ms. Allocated memory was 130.0 MB in the beginning and 293.6 MB in the end (delta: 163.6 MB). Free memory was 91.6 MB in the beginning and 200.1 MB in the end (delta: -108.5 MB). Peak memory consumption was 56.8 MB. Max. memory is 16.1 GB. [2021-11-02 22:44:36,971 INFO L168 Benchmark]: Witness Printer took 55.06 ms. Allocated memory is still 293.6 MB. Free memory was 200.1 MB in the beginning and 198.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:44:36,974 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 130.0 MB. Free memory is still 105.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.68 ms. Allocated memory is still 130.0 MB. Free memory was 89.2 MB in the beginning and 103.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.65 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 102.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.95 ms. Allocated memory is still 130.0 MB. Free memory was 102.2 MB in the beginning and 101.7 MB in the end (delta: 515.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 279.80 ms. Allocated memory is still 130.0 MB. Free memory was 101.7 MB in the beginning and 92.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 37345.33 ms. Allocated memory was 130.0 MB in the beginning and 293.6 MB in the end (delta: 163.6 MB). Free memory was 91.6 MB in the beginning and 200.1 MB in the end (delta: -108.5 MB). Peak memory consumption was 56.8 MB. Max. memory is 16.1 GB. * Witness Printer took 55.06 ms. Allocated memory is still 293.6 MB. Free memory was 200.1 MB in the beginning and 198.0 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 37.2s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 208 SDtfs, 786 SDslu, 2067 SDs, 0 SdLazy, 3345 SolverSat, 280 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2475 GetRequests, 1858 SyntacticMatches, 0 SemanticMatches, 617 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6233 ImplicationChecksByTransitivity, 10.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, InterpolantAutomatonStates: 340, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 18.6s InterpolantComputationTime, 2930 NumberOfCodeBlocks, 2930 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 2889 ConstructedInterpolants, 0 QuantifiedInterpolants, 8623 SizeOfPredicates, 235 NumberOfNonLiveVariables, 4920 ConjunctsInSsa, 633 ConjunctsInUnsatCore, 41 InterpolantComputations, 1 PerfectInterpolantSequences, 9390/17640 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-02 22:44:37,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a594c590-9f91-4591-aff9-326e715cd315/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE