./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45de9b50be73ad8596a15a884179fe100fef73e55c1a72900286dd4b459dfc0f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:13,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:13,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:13,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:13,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:13,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:13,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:13,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:13,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:13,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:13,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:13,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:13,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:13,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:13,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:13,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:13,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:13,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:13,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:13,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:13,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:13,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:13,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:13,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:13,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:13,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:13,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:13,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:13,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:13,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:13,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:13,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:13,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:13,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:13,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:13,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:13,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:13,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:13,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:13,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:13,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:13,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:45:13,514 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:13,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:13,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:13,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:13,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:13,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:13,525 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:13,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:13,525 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:13,525 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:13,527 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:13,527 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:13,528 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:13,528 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:13,528 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:13,528 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:13,529 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:13,529 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:13,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:13,531 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:13,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:13,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:13,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:13,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:13,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:13,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:13,535 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:13,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:13,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:13,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:13,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:13,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:13,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:13,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:13,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:13,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:13,539 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:13,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:13,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:13,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:13,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:13,540 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45de9b50be73ad8596a15a884179fe100fef73e55c1a72900286dd4b459dfc0f [2021-11-23 16:45:13,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:13,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:13,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:13,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:13,896 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:13,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label11.c [2021-11-23 16:45:13,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data/1cffbeb01/240733125ef84c3c978ffe9e1ce823eb/FLAG132dd3761 [2021-11-23 16:45:14,669 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:14,669 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/sv-benchmarks/c/eca-rers2012/Problem14_label11.c [2021-11-23 16:45:14,679 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data/1cffbeb01/240733125ef84c3c978ffe9e1ce823eb/FLAG132dd3761 [2021-11-23 16:45:14,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data/1cffbeb01/240733125ef84c3c978ffe9e1ce823eb [2021-11-23 16:45:14,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:14,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:14,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:14,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:14,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:14,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:14" (1/1) ... [2021-11-23 16:45:14,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e261be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:14, skipping insertion in model container [2021-11-23 16:45:14,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:14" (1/1) ... [2021-11-23 16:45:14,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:15,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:15,297 WARN L230 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_921de283-ba0b-451e-a664-650536b7f31b/sv-benchmarks/c/eca-rers2012/Problem14_label11.c[2373,2386] [2021-11-23 16:45:15,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:15,601 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:15,637 WARN L230 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_921de283-ba0b-451e-a664-650536b7f31b/sv-benchmarks/c/eca-rers2012/Problem14_label11.c[2373,2386] [2021-11-23 16:45:15,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:15,820 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:15,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15 WrapperNode [2021-11-23 16:45:15,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:15,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:15,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:15,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:15,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:15,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:15,983 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-11-23 16:45:15,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:15,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:15,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:15,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:15,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:15,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:16,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:16,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:16,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:16,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:16,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:16,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:16,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:16,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:16,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:16,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:15" (1/1) ... [2021-11-23 16:45:16,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:16,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:16,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:16,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:16,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:16,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:45:16,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:16,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:16,281 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:16,283 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:17,493 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:17,529 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:45:17,534 INFO L158 Benchmark]: Toolchain (without parser) took 2571.13ms. Allocated memory was 107.0MB in the beginning and 140.5MB in the end (delta: 33.6MB). Free memory was 72.1MB in the beginning and 90.0MB in the end (delta: -17.9MB). Peak memory consumption was 66.8MB. Max. memory is 16.1GB. [2021-11-23 16:45:17,535 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 107.0MB. Free memory is still 61.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:45:17,536 INFO L158 Benchmark]: CACSL2BoogieTranslator took 856.39ms. Allocated memory is still 107.0MB. Free memory was 71.9MB in the beginning and 59.5MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 16:45:17,537 INFO L158 Benchmark]: Boogie Procedure Inliner took 162.53ms. Allocated memory was 107.0MB in the beginning and 140.5MB in the end (delta: 33.6MB). Free memory was 59.5MB in the beginning and 109.8MB in the end (delta: -50.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 16:45:17,538 INFO L158 Benchmark]: Boogie Preprocessor took 125.78ms. Allocated memory is still 140.5MB. Free memory was 109.8MB in the beginning and 104.6MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 16:45:17,539 INFO L158 Benchmark]: RCFGBuilder took 1420.77ms. Allocated memory is still 140.5MB. Free memory was 104.6MB in the beginning and 90.0MB in the end (delta: 14.5MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2021-11-23 16:45:17,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 107.0MB. Free memory is still 61.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 856.39ms. Allocated memory is still 107.0MB. Free memory was 71.9MB in the beginning and 59.5MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 162.53ms. Allocated memory was 107.0MB in the beginning and 140.5MB in the end (delta: 33.6MB). Free memory was 59.5MB in the beginning and 109.8MB in the end (delta: -50.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 125.78ms. Allocated memory is still 140.5MB. Free memory was 109.8MB in the beginning and 104.6MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1420.77ms. Allocated memory is still 140.5MB. Free memory was 104.6MB in the beginning and 90.0MB in the end (delta: 14.5MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:45:17,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45de9b50be73ad8596a15a884179fe100fef73e55c1a72900286dd4b459dfc0f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:20,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:20,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:20,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:20,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:20,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:20,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:20,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:20,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:20,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:20,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:20,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:20,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:20,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:20,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:20,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:20,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:20,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:20,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:20,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:20,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:20,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:20,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:20,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:20,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:20,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:20,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:20,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:20,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:20,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:20,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:20,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:20,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:20,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:20,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:20,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:20,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:20,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:20,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:20,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:20,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:20,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:20,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:20,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:20,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:20,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:20,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:20,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:20,231 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:20,231 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:20,231 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:20,232 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:20,232 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:20,232 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:20,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:20,234 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:20,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:20,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:20,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:20,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:20,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:20,243 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:20,243 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:20,244 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:20,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:20,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:20,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:20,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:20,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:20,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:20,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:20,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:20,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:20,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:20,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:20,247 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:20,247 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:20,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:20,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:20,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:20,249 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45de9b50be73ad8596a15a884179fe100fef73e55c1a72900286dd4b459dfc0f [2021-11-23 16:45:20,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:20,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:20,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:20,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:20,706 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:20,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label11.c [2021-11-23 16:45:20,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data/d26304305/db151e932cc64e71957802fc44e4cb2e/FLAGc6ae5e769 [2021-11-23 16:45:21,463 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:21,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/sv-benchmarks/c/eca-rers2012/Problem14_label11.c [2021-11-23 16:45:21,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data/d26304305/db151e932cc64e71957802fc44e4cb2e/FLAGc6ae5e769 [2021-11-23 16:45:21,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/data/d26304305/db151e932cc64e71957802fc44e4cb2e [2021-11-23 16:45:21,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:21,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:21,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:21,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:21,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:21,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:21" (1/1) ... [2021-11-23 16:45:21,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5abd03db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:21, skipping insertion in model container [2021-11-23 16:45:21,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:21" (1/1) ... [2021-11-23 16:45:21,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:21,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:22,057 WARN L230 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_921de283-ba0b-451e-a664-650536b7f31b/sv-benchmarks/c/eca-rers2012/Problem14_label11.c[2373,2386] [2021-11-23 16:45:22,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:22,466 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:22,503 WARN L230 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_921de283-ba0b-451e-a664-650536b7f31b/sv-benchmarks/c/eca-rers2012/Problem14_label11.c[2373,2386] [2021-11-23 16:45:22,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:22,690 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:22,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22 WrapperNode [2021-11-23 16:45:22,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:22,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:22,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:22,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:22,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,812 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2021-11-23 16:45:22,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:22,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:22,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:22,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:22,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:22,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:22,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:22,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:22,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:22,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:22,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:23,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:23,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:23,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:45:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:23,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:23,128 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:23,129 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:26,748 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:26,764 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:45:26,764 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:45:26,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:26 BoogieIcfgContainer [2021-11-23 16:45:26,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:45:26,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:45:26,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:45:26,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:45:26,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:21" (1/3) ... [2021-11-23 16:45:26,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4430f4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:26, skipping insertion in model container [2021-11-23 16:45:26,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (2/3) ... [2021-11-23 16:45:26,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4430f4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:26, skipping insertion in model container [2021-11-23 16:45:26,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:26" (3/3) ... [2021-11-23 16:45:26,781 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label11.c [2021-11-23 16:45:26,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:45:26,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:45:26,885 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:45:26,891 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=FINITE_AUTOMATA, 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 [2021-11-23 16:45:26,892 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:45:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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) [2021-11-23 16:45:26,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:45:26,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:26,925 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:26,926 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash -85512855, now seen corresponding path program 1 times [2021-11-23 16:45:26,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:26,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186432998] [2021-11-23 16:45:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:26,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:26,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:26,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:45:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:27,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:27,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:27,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:27,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:27,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186432998] [2021-11-23 16:45:27,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186432998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:27,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:27,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:27,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621265417] [2021-11-23 16:45:27,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:27,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:27,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:27,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:27,317 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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) [2021-11-23 16:45:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:31,372 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2021-11-23 16:45:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 16:45:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:31,389 INFO L225 Difference]: With dead ends: 669 [2021-11-23 16:45:31,389 INFO L226 Difference]: Without dead ends: 360 [2021-11-23 16:45:31,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:31,397 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:31,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 131 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 16:45:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-23 16:45:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-23 16:45:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4874651810584958) internal successors, (534), 359 states have internal predecessors, (534), 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) [2021-11-23 16:45:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 534 transitions. [2021-11-23 16:45:31,460 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 534 transitions. Word has length 21 [2021-11-23 16:45:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:31,461 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 534 transitions. [2021-11-23 16:45:31,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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) [2021-11-23 16:45:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 534 transitions. [2021-11-23 16:45:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 16:45:31,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:31,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:31,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:31,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:31,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:31,669 INFO L85 PathProgramCache]: Analyzing trace with hash 413864148, now seen corresponding path program 1 times [2021-11-23 16:45:31,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:31,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334102024] [2021-11-23 16:45:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:31,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:31,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:31,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:31,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:45:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:31,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:32,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:32,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334102024] [2021-11-23 16:45:32,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334102024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:32,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:32,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:32,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375599780] [2021-11-23 16:45:32,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:32,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:32,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:32,158 INFO L87 Difference]: Start difference. First operand 360 states and 534 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2021-11-23 16:45:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:35,759 INFO L93 Difference]: Finished difference Result 1074 states and 1597 transitions. [2021-11-23 16:45:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-23 16:45:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:35,765 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 16:45:35,766 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 16:45:35,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:35,770 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:35,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 102 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 16:45:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 16:45:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 16:45:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3454545454545455) internal successors, (962), 715 states have internal predecessors, (962), 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) [2021-11-23 16:45:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 962 transitions. [2021-11-23 16:45:35,823 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 962 transitions. Word has length 86 [2021-11-23 16:45:35,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:35,824 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 962 transitions. [2021-11-23 16:45:35,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2021-11-23 16:45:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 962 transitions. [2021-11-23 16:45:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 16:45:35,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:35,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:35,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:36,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:36,042 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 462115454, now seen corresponding path program 1 times [2021-11-23 16:45:36,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:36,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614486217] [2021-11-23 16:45:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:36,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:36,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:36,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:36,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:45:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:36,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:36,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:36,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:36,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614486217] [2021-11-23 16:45:36,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614486217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:36,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:36,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:36,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354281505] [2021-11-23 16:45:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:36,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:36,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:36,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:36,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:36,513 INFO L87 Difference]: Start difference. First operand 716 states and 962 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2021-11-23 16:45:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:40,103 INFO L93 Difference]: Finished difference Result 1964 states and 2655 transitions. [2021-11-23 16:45:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:40,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-23 16:45:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:40,113 INFO L225 Difference]: With dead ends: 1964 [2021-11-23 16:45:40,113 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 16:45:40,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:40,117 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 129 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:40,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 16:45:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 16:45:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2021-11-23 16:45:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.245796637309848) internal successors, (1556), 1249 states have internal predecessors, (1556), 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) [2021-11-23 16:45:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1556 transitions. [2021-11-23 16:45:40,175 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1556 transitions. Word has length 89 [2021-11-23 16:45:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:40,176 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1556 transitions. [2021-11-23 16:45:40,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2021-11-23 16:45:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1556 transitions. [2021-11-23 16:45:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-23 16:45:40,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:40,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:40,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:40,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:40,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:40,392 INFO L85 PathProgramCache]: Analyzing trace with hash 403738315, now seen corresponding path program 1 times [2021-11-23 16:45:40,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:40,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783425657] [2021-11-23 16:45:40,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:40,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:40,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:40,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:40,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:45:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:45:40,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:41,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:42,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:42,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783425657] [2021-11-23 16:45:42,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783425657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:42,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1564501488] [2021-11-23 16:45:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:42,420 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:42,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:42,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:42,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 16:45:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:42,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:45:42,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 86 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:43,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 86 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:44,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1564501488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:44,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815445384] [2021-11-23 16:45:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:44,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:44,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:44,039 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:44,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 16:45:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:44,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:45:44,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:45,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:45,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815445384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:45,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 16:45:45,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 9 [2021-11-23 16:45:45,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068132187] [2021-11-23 16:45:45,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:45,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:45,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:45:45,168 INFO L87 Difference]: Start difference. First operand 1250 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 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) [2021-11-23 16:45:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:52,514 INFO L93 Difference]: Finished difference Result 2378 states and 3064 transitions. [2021-11-23 16:45:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:52,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-23 16:45:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:52,523 INFO L225 Difference]: With dead ends: 2378 [2021-11-23 16:45:52,524 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 16:45:52,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 838 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:45:52,527 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 211 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:52,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 16 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 16:45:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 16:45:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1072. [2021-11-23 16:45:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.0999066293183941) internal successors, (1178), 1071 states have internal predecessors, (1178), 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) [2021-11-23 16:45:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1178 transitions. [2021-11-23 16:45:52,562 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1178 transitions. Word has length 170 [2021-11-23 16:45:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:52,562 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1178 transitions. [2021-11-23 16:45:52,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 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) [2021-11-23 16:45:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1178 transitions. [2021-11-23 16:45:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-23 16:45:52,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:52,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:52,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:52,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 16:45:52,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-23 16:45:53,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:53,183 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:53,183 INFO L85 PathProgramCache]: Analyzing trace with hash 246955434, now seen corresponding path program 1 times [2021-11-23 16:45:53,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:53,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889605032] [2021-11-23 16:45:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:53,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:53,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:53,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:53,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:45:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:53,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:53,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 16:45:54,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:54,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:54,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889605032] [2021-11-23 16:45:54,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889605032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:54,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:54,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:54,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547341803] [2021-11-23 16:45:54,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:54,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:54,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:54,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:54,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:54,908 INFO L87 Difference]: Start difference. First operand 1072 states and 1178 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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) [2021-11-23 16:45:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:56,948 INFO L93 Difference]: Finished difference Result 1786 states and 1991 transitions. [2021-11-23 16:45:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:56,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-23 16:45:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:56,956 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 16:45:56,956 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 16:45:56,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:56,959 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:56,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 67 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 16:45:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 16:45:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 16:45:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.096171802054155) internal successors, (1174), 1071 states have internal predecessors, (1174), 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) [2021-11-23 16:45:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1174 transitions. [2021-11-23 16:45:56,991 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1174 transitions. Word has length 196 [2021-11-23 16:45:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:56,992 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1174 transitions. [2021-11-23 16:45:56,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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) [2021-11-23 16:45:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1174 transitions. [2021-11-23 16:45:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-11-23 16:45:57,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:57,003 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:57,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:57,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:57,219 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1929170799, now seen corresponding path program 1 times [2021-11-23 16:45:57,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:57,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126907650] [2021-11-23 16:45:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:57,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:57,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:57,224 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:57,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:45:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:57,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 262 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-23 16:45:58,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-23 16:46:00,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:00,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126907650] [2021-11-23 16:46:00,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126907650] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:46:00,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:46:00,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 16:46:00,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679652585] [2021-11-23 16:46:00,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:00,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:00,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:00,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:00,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:00,623 INFO L87 Difference]: Start difference. First operand 1072 states and 1174 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2021-11-23 16:46:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:06,694 INFO L93 Difference]: Finished difference Result 2320 states and 2617 transitions. [2021-11-23 16:46:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:06,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-11-23 16:46:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:06,705 INFO L225 Difference]: With dead ends: 2320 [2021-11-23 16:46:06,706 INFO L226 Difference]: Without dead ends: 1606 [2021-11-23 16:46:06,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:06,708 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 76 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:06,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 230 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 16:46:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-23 16:46:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606. [2021-11-23 16:46:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.1190031152647975) internal successors, (1796), 1605 states have internal predecessors, (1796), 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) [2021-11-23 16:46:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1796 transitions. [2021-11-23 16:46:06,756 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1796 transitions. Word has length 407 [2021-11-23 16:46:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:06,757 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1796 transitions. [2021-11-23 16:46:06,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2021-11-23 16:46:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1796 transitions. [2021-11-23 16:46:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-23 16:46:06,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:06,769 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:06,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 16:46:06,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:06,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash 961088182, now seen corresponding path program 1 times [2021-11-23 16:46:06,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:06,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203288908] [2021-11-23 16:46:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:06,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:06,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:06,992 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:07,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:46:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:46:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 75 proven. 347 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 16:46:09,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 16:46:13,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:13,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203288908] [2021-11-23 16:46:13,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203288908] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:46:13,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:46:13,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 16:46:13,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034997547] [2021-11-23 16:46:13,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:13,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:13,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:13,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:13,410 INFO L87 Difference]: Start difference. First operand 1606 states and 1796 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-11-23 16:46:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:17,642 INFO L93 Difference]: Finished difference Result 3210 states and 3663 transitions. [2021-11-23 16:46:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 414 [2021-11-23 16:46:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:17,655 INFO L225 Difference]: With dead ends: 3210 [2021-11-23 16:46:17,655 INFO L226 Difference]: Without dead ends: 1962 [2021-11-23 16:46:17,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 823 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:17,658 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:17,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 16:46:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-11-23 16:46:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2021-11-23 16:46:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.1147373788883224) internal successors, (2186), 1961 states have internal predecessors, (2186), 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) [2021-11-23 16:46:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2186 transitions. [2021-11-23 16:46:17,718 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2186 transitions. Word has length 414 [2021-11-23 16:46:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:17,720 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2186 transitions. [2021-11-23 16:46:17,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-11-23 16:46:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2186 transitions. [2021-11-23 16:46:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-11-23 16:46:17,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:17,726 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:17,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:17,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:17,939 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash -241293139, now seen corresponding path program 1 times [2021-11-23 16:46:17,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:17,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122152626] [2021-11-23 16:46:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:17,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:17,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:17,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:17,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:46:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:46:18,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 75 proven. 416 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 16:46:27,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 422 proven. 69 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 16:46:51,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:51,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122152626] [2021-11-23 16:46:51,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122152626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:51,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [972519487] [2021-11-23 16:46:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:51,791 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:51,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:51,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:51,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 16:46:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:52,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:46:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-11-23 16:46:52,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:52,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [972519487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:52,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:46:52,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 10] total 19 [2021-11-23 16:46:52,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026792076] [2021-11-23 16:46:52,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:52,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:52,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:52,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:52,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:46:52,836 INFO L87 Difference]: Start difference. First operand 1962 states and 2186 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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) [2021-11-23 16:46:55,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:55,654 INFO L93 Difference]: Finished difference Result 4100 states and 4656 transitions. [2021-11-23 16:46:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:55,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 459 [2021-11-23 16:46:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:55,671 INFO L225 Difference]: With dead ends: 4100 [2021-11-23 16:46:55,671 INFO L226 Difference]: Without dead ends: 2496 [2021-11-23 16:46:55,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1374 GetRequests, 1357 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:46:55,675 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 160 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:55,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 229 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 16:46:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-11-23 16:46:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2318. [2021-11-23 16:46:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 1.1096245144583514) internal successors, (2571), 2317 states have internal predecessors, (2571), 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) [2021-11-23 16:46:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2571 transitions. [2021-11-23 16:46:55,744 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2571 transitions. Word has length 459 [2021-11-23 16:46:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:55,746 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2571 transitions. [2021-11-23 16:46:55,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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) [2021-11-23 16:46:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2571 transitions. [2021-11-23 16:46:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2021-11-23 16:46:55,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:55,753 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:55,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-23 16:46:55,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:56,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:56,165 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:56,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:56,165 INFO L85 PathProgramCache]: Analyzing trace with hash 519672339, now seen corresponding path program 1 times [2021-11-23 16:46:56,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:56,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496796954] [2021-11-23 16:46:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:56,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:56,170 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:56,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:46:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:56,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:46:56,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 380 proven. 416 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-23 16:47:05,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 727 proven. 69 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-23 16:47:30,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:30,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496796954] [2021-11-23 16:47:30,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496796954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:30,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794998995] [2021-11-23 16:47:30,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:30,956 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:30,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:30,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:30,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 16:47:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:47:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-11-23 16:47:32,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:32,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794998995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:32,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:47:32,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2021-11-23 16:47:32,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216676940] [2021-11-23 16:47:32,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:32,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:47:32,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:47:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-23 16:47:32,985 INFO L87 Difference]: Start difference. First operand 2318 states and 2571 transitions. Second operand has 6 states, 6 states have (on average 43.666666666666664) internal successors, (262), 6 states have internal predecessors, (262), 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) [2021-11-23 16:47:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:35,583 INFO L93 Difference]: Finished difference Result 4328 states and 4831 transitions. [2021-11-23 16:47:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:47:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 43.666666666666664) internal successors, (262), 6 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 538 [2021-11-23 16:47:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:35,599 INFO L225 Difference]: With dead ends: 4328 [2021-11-23 16:47:35,599 INFO L226 Difference]: Without dead ends: 2318 [2021-11-23 16:47:35,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1611 GetRequests, 1591 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-23 16:47:35,604 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 26 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:35,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 264 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 16:47:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-11-23 16:47:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2318. [2021-11-23 16:47:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 1.1001294777729822) internal successors, (2549), 2317 states have internal predecessors, (2549), 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) [2021-11-23 16:47:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2549 transitions. [2021-11-23 16:47:35,669 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2549 transitions. Word has length 538 [2021-11-23 16:47:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:35,670 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2549 transitions. [2021-11-23 16:47:35,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.666666666666664) internal successors, (262), 6 states have internal predecessors, (262), 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) [2021-11-23 16:47:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2549 transitions. [2021-11-23 16:47:35,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2021-11-23 16:47:35,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:35,677 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:35,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:35,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:36,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:36,091 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash 546911638, now seen corresponding path program 1 times [2021-11-23 16:47:36,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:36,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857092116] [2021-11-23 16:47:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:36,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:36,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:36,098 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:36,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:47:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:36,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:47:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 419 proven. 210 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-23 16:47:43,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-23 16:48:11,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:11,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857092116] [2021-11-23 16:48:11,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857092116] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:48:11,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:48:11,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2021-11-23 16:48:11,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293809947] [2021-11-23 16:48:11,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:11,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:48:11,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:11,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:48:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:48:11,294 INFO L87 Difference]: Start difference. First operand 2318 states and 2549 transitions. Second operand has 9 states, 9 states have (on average 48.888888888888886) internal successors, (440), 9 states have internal predecessors, (440), 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) [2021-11-23 16:48:14,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:48:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:16,508 INFO L93 Difference]: Finished difference Result 4253 states and 4710 transitions. [2021-11-23 16:48:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:48:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 48.888888888888886) internal successors, (440), 9 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 565 [2021-11-23 16:48:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:16,521 INFO L225 Difference]: With dead ends: 4253 [2021-11-23 16:48:16,522 INFO L226 Difference]: Without dead ends: 2253 [2021-11-23 16:48:16,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1113 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:48:16,526 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 265 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:16,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 244 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 16:48:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-11-23 16:48:16,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2253. [2021-11-23 16:48:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 1.1016873889875667) internal successors, (2481), 2252 states have internal predecessors, (2481), 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) [2021-11-23 16:48:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 2481 transitions. [2021-11-23 16:48:16,599 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 2481 transitions. Word has length 565 [2021-11-23 16:48:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:16,600 INFO L470 AbstractCegarLoop]: Abstraction has 2253 states and 2481 transitions. [2021-11-23 16:48:16,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 48.888888888888886) internal successors, (440), 9 states have internal predecessors, (440), 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) [2021-11-23 16:48:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 2481 transitions. [2021-11-23 16:48:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2021-11-23 16:48:16,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:16,608 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:16,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 16:48:16,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:16,825 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash 587591264, now seen corresponding path program 1 times [2021-11-23 16:48:16,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:16,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867591782] [2021-11-23 16:48:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:16,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:16,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:16,831 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:16,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:48:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:17,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:48:17,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 470 proven. 353 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-23 16:48:18,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 823 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-23 16:48:20,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:20,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867591782] [2021-11-23 16:48:20,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867591782] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:48:20,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:48:20,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 16:48:20,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307274645] [2021-11-23 16:48:20,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:20,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:20,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:20,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:20,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:20,540 INFO L87 Difference]: Start difference. First operand 2253 states and 2481 transitions. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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) [2021-11-23 16:48:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:25,445 INFO L93 Difference]: Finished difference Result 5038 states and 5662 transitions. [2021-11-23 16:48:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:25,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 592 [2021-11-23 16:48:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:25,464 INFO L225 Difference]: With dead ends: 5038 [2021-11-23 16:48:25,465 INFO L226 Difference]: Without dead ends: 3143 [2021-11-23 16:48:25,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:25,469 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:25,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 54 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-23 16:48:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2021-11-23 16:48:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 3143. [2021-11-23 16:48:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 3142 states have (on average 1.0942075111394016) internal successors, (3438), 3142 states have internal predecessors, (3438), 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) [2021-11-23 16:48:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 3438 transitions. [2021-11-23 16:48:25,582 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 3438 transitions. Word has length 592 [2021-11-23 16:48:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:25,584 INFO L470 AbstractCegarLoop]: Abstraction has 3143 states and 3438 transitions. [2021-11-23 16:48:25,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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) [2021-11-23 16:48:25,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 3438 transitions. [2021-11-23 16:48:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2021-11-23 16:48:25,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:25,594 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:25,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:25,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:25,807 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2120071996, now seen corresponding path program 1 times [2021-11-23 16:48:25,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:25,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600556372] [2021-11-23 16:48:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:25,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:25,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:25,813 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:25,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:48:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 931 proven. 0 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-23 16:48:27,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:27,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:27,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600556372] [2021-11-23 16:48:27,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600556372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:27,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:27,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:27,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605400169] [2021-11-23 16:48:27,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:27,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:27,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:27,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:27,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:27,306 INFO L87 Difference]: Start difference. First operand 3143 states and 3438 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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) [2021-11-23 16:48:29,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:29,618 INFO L93 Difference]: Finished difference Result 6818 states and 7530 transitions. [2021-11-23 16:48:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:29,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 747 [2021-11-23 16:48:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:29,650 INFO L225 Difference]: With dead ends: 6818 [2021-11-23 16:48:29,650 INFO L226 Difference]: Without dead ends: 4033 [2021-11-23 16:48:29,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:29,655 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 109 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:29,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 221 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 16:48:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2021-11-23 16:48:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 4033. [2021-11-23 16:48:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 4032 states have (on average 1.0756448412698412) internal successors, (4337), 4032 states have internal predecessors, (4337), 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) [2021-11-23 16:48:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 4337 transitions. [2021-11-23 16:48:29,762 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 4337 transitions. Word has length 747 [2021-11-23 16:48:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:29,764 INFO L470 AbstractCegarLoop]: Abstraction has 4033 states and 4337 transitions. [2021-11-23 16:48:29,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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) [2021-11-23 16:48:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 4337 transitions. [2021-11-23 16:48:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2021-11-23 16:48:29,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:29,775 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:29,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:29,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:29,995 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2015273687, now seen corresponding path program 1 times [2021-11-23 16:48:29,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:29,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276796206] [2021-11-23 16:48:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:29,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:29,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:30,000 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:30,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:48:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:30,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:48:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 775 proven. 707 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-23 16:48:39,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 1302 proven. 180 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-23 16:48:57,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:57,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276796206] [2021-11-23 16:48:57,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276796206] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:57,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [808810326] [2021-11-23 16:48:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:57,788 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:48:57,791 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:48:57,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 16:48:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:48:58,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 1104 proven. 168 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-23 16:49:01,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 1104 proven. 168 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-23 16:49:04,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [808810326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:04,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156031988] [2021-11-23 16:49:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:04,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:04,340 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:04,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 16:49:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:49:04,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 1088 proven. 93 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-23 16:49:09,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 1088 proven. 93 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-23 16:49:13,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156031988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:13,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:49:13,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6, 6, 4, 4] total 25 [2021-11-23 16:49:13,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126857283] [2021-11-23 16:49:13,542 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:13,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 16:49:13,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:13,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 16:49:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2021-11-23 16:49:13,550 INFO L87 Difference]: Start difference. First operand 4033 states and 4337 transitions. Second operand has 25 states, 25 states have (on average 67.12) internal successors, (1678), 25 states have internal predecessors, (1678), 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) [2021-11-23 16:49:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:31,995 INFO L93 Difference]: Finished difference Result 8621 states and 9265 transitions. [2021-11-23 16:49:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 16:49:31,997 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 67.12) internal successors, (1678), 25 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 765 [2021-11-23 16:49:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:32,025 INFO L225 Difference]: With dead ends: 8621 [2021-11-23 16:49:32,026 INFO L226 Difference]: Without dead ends: 4928 [2021-11-23 16:49:32,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4617 GetRequests, 4572 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=495, Invalid=1667, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 16:49:32,032 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1839 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 10699 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1839 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 10873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 10699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:32,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1839 Valid, 204 Invalid, 10873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 10699 Invalid, 0 Unknown, 0 Unchecked, 16.3s Time] [2021-11-23 16:49:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-11-23 16:49:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4010. [2021-11-23 16:49:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4009 states have (on average 1.0466450486405587) internal successors, (4196), 4009 states have internal predecessors, (4196), 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) [2021-11-23 16:49:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 4196 transitions. [2021-11-23 16:49:32,135 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 4196 transitions. Word has length 765 [2021-11-23 16:49:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:32,136 INFO L470 AbstractCegarLoop]: Abstraction has 4010 states and 4196 transitions. [2021-11-23 16:49:32,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 67.12) internal successors, (1678), 25 states have internal predecessors, (1678), 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) [2021-11-23 16:49:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 4196 transitions. [2021-11-23 16:49:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2021-11-23 16:49:32,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:32,151 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:32,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 16:49:32,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-23 16:49:32,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:32,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:32,769 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1512823600, now seen corresponding path program 1 times [2021-11-23 16:49:32,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:32,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656679004] [2021-11-23 16:49:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:32,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:32,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:32,778 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:32,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:49:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:33,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:33,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 16:49:34,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:34,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656679004] [2021-11-23 16:49:34,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656679004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:34,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:34,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:34,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707412740] [2021-11-23 16:49:34,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:34,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:34,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:34,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:34,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:34,266 INFO L87 Difference]: Start difference. First operand 4010 states and 4196 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2021-11-23 16:49:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:36,269 INFO L93 Difference]: Finished difference Result 4902 states and 5178 transitions. [2021-11-23 16:49:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:36,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 842 [2021-11-23 16:49:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:36,298 INFO L225 Difference]: With dead ends: 4902 [2021-11-23 16:49:36,298 INFO L226 Difference]: Without dead ends: 4900 [2021-11-23 16:49:36,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 840 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:36,301 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 171 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:36,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 201 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 16:49:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4900 states. [2021-11-23 16:49:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4900 to 4366. [2021-11-23 16:49:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4366 states, 4365 states have (on average 1.0540664375715922) internal successors, (4601), 4365 states have internal predecessors, (4601), 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) [2021-11-23 16:49:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4366 states to 4366 states and 4601 transitions. [2021-11-23 16:49:36,397 INFO L78 Accepts]: Start accepts. Automaton has 4366 states and 4601 transitions. Word has length 842 [2021-11-23 16:49:36,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:36,398 INFO L470 AbstractCegarLoop]: Abstraction has 4366 states and 4601 transitions. [2021-11-23 16:49:36,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2021-11-23 16:49:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4366 states and 4601 transitions. [2021-11-23 16:49:36,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 925 [2021-11-23 16:49:36,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:36,413 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:36,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:36,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:36,626 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:36,626 INFO L85 PathProgramCache]: Analyzing trace with hash 577742536, now seen corresponding path program 1 times [2021-11-23 16:49:36,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:36,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137856382] [2021-11-23 16:49:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:36,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:36,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:36,632 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:36,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 16:49:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:49:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2657 backedges. 151 proven. 2135 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-23 16:49:39,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2657 backedges. 1631 proven. 82 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-11-23 16:49:44,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137856382] [2021-11-23 16:49:44,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137856382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [610517105] [2021-11-23 16:49:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:44,918 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:44,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:44,919 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:44,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 16:49:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:49:45,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2657 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 2506 trivial. 0 not checked. [2021-11-23 16:49:46,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:46,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [610517105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:46,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:49:46,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5] total 11 [2021-11-23 16:49:46,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976641579] [2021-11-23 16:49:46,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:46,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:46,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:46,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:49:46,563 INFO L87 Difference]: Start difference. First operand 4366 states and 4601 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2021-11-23 16:49:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:49,032 INFO L93 Difference]: Finished difference Result 8908 states and 9452 transitions. [2021-11-23 16:49:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 924 [2021-11-23 16:49:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:49,049 INFO L225 Difference]: With dead ends: 8908 [2021-11-23 16:49:49,049 INFO L226 Difference]: Without dead ends: 4722 [2021-11-23 16:49:49,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2769 GetRequests, 2760 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:49:49,056 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 160 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:49,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 236 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 16:49:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2021-11-23 16:49:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 4544. [2021-11-23 16:49:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 1.0530486462689852) internal successors, (4784), 4543 states have internal predecessors, (4784), 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) [2021-11-23 16:49:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 4784 transitions. [2021-11-23 16:49:49,149 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 4784 transitions. Word has length 924 [2021-11-23 16:49:49,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:49,150 INFO L470 AbstractCegarLoop]: Abstraction has 4544 states and 4784 transitions. [2021-11-23 16:49:49,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2021-11-23 16:49:49,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 4784 transitions. [2021-11-23 16:49:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 931 [2021-11-23 16:49:49,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:49,165 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:49,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:49,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:49,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:49,583 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2118732823, now seen corresponding path program 1 times [2021-11-23 16:49:49,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:49,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165043676] [2021-11-23 16:49:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:49,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:49,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:49,589 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:49,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:49:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:49:49,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2687 backedges. 151 proven. 2165 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-23 16:49:52,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2687 backedges. 1655 proven. 88 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-11-23 16:49:57,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:57,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165043676] [2021-11-23 16:49:57,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165043676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:57,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [729955996] [2021-11-23 16:49:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:57,491 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:57,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:57,492 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:57,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 16:49:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:49:57,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2687 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 2536 trivial. 0 not checked. [2021-11-23 16:49:59,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:59,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [729955996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:59,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:49:59,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 12 [2021-11-23 16:49:59,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686810680] [2021-11-23 16:49:59,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:59,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:59,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:49:59,189 INFO L87 Difference]: Start difference. First operand 4544 states and 4784 transitions. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2021-11-23 16:50:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:03,111 INFO L93 Difference]: Finished difference Result 7766 states and 8273 transitions. [2021-11-23 16:50:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:50:03,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 930 [2021-11-23 16:50:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:03,127 INFO L225 Difference]: With dead ends: 7766 [2021-11-23 16:50:03,128 INFO L226 Difference]: Without dead ends: 4366 [2021-11-23 16:50:03,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2789 GetRequests, 2778 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:50:03,133 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 499 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:03,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 256 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 16:50:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-11-23 16:50:03,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 4366. [2021-11-23 16:50:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4366 states, 4365 states have (on average 1.0460481099656358) internal successors, (4566), 4365 states have internal predecessors, (4566), 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) [2021-11-23 16:50:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4366 states to 4366 states and 4566 transitions. [2021-11-23 16:50:03,214 INFO L78 Accepts]: Start accepts. Automaton has 4366 states and 4566 transitions. Word has length 930 [2021-11-23 16:50:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:03,215 INFO L470 AbstractCegarLoop]: Abstraction has 4366 states and 4566 transitions. [2021-11-23 16:50:03,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2021-11-23 16:50:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4366 states and 4566 transitions. [2021-11-23 16:50:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 938 [2021-11-23 16:50:03,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:03,230 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:03,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:03,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:03,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:03,643 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:03,644 INFO L85 PathProgramCache]: Analyzing trace with hash -995466568, now seen corresponding path program 1 times [2021-11-23 16:50:03,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:03,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924643244] [2021-11-23 16:50:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:03,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:03,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:03,649 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:03,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 16:50:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:03,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:50:03,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2722 backedges. 151 proven. 2200 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-23 16:50:06,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2722 backedges. 1683 proven. 95 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-11-23 16:50:11,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:11,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924643244] [2021-11-23 16:50:11,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924643244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:11,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [294771221] [2021-11-23 16:50:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:11,325 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:11,326 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:11,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 16:50:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:12,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:50:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2722 backedges. 1286 proven. 114 refuted. 0 times theorem prover too weak. 1322 trivial. 0 not checked. [2021-11-23 16:50:36,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2722 backedges. 1286 proven. 114 refuted. 0 times theorem prover too weak. 1322 trivial. 0 not checked. [2021-11-23 16:50:39,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [294771221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122771428] [2021-11-23 16:50:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:39,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:39,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:39,617 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:39,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 16:50:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:39,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:50:39,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2722 backedges. 1324 proven. 95 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-11-23 16:51:03,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2722 backedges. 1324 proven. 95 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-11-23 16:51:06,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122771428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:06,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:06,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4, 4, 4, 4] total 14 [2021-11-23 16:51:06,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884151678] [2021-11-23 16:51:06,261 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:06,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 16:51:06,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 16:51:06,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:51:06,265 INFO L87 Difference]: Start difference. First operand 4366 states and 4566 transitions. Second operand has 14 states, 14 states have (on average 122.42857142857143) internal successors, (1714), 14 states have internal predecessors, (1714), 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) [2021-11-23 16:51:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:34,629 INFO L93 Difference]: Finished difference Result 11976 states and 12670 transitions. [2021-11-23 16:51:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:51:34,631 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 122.42857142857143) internal successors, (1714), 14 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 937 [2021-11-23 16:51:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:34,646 INFO L225 Difference]: With dead ends: 11976 [2021-11-23 16:51:34,646 INFO L226 Difference]: Without dead ends: 8081 [2021-11-23 16:51:34,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5620 GetRequests, 5605 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:51:34,653 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1202 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 6102 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 8312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 6102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2064 IncrementalHoareTripleChecker+Unchecked, 27.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:34,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 138 Invalid, 8312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 6102 Invalid, 0 Unknown, 2064 Unchecked, 27.9s Time] [2021-11-23 16:51:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2021-11-23 16:51:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 6757. [2021-11-23 16:51:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 1.0546181172291296) internal successors, (7125), 6756 states have internal predecessors, (7125), 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) [2021-11-23 16:51:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 7125 transitions. [2021-11-23 16:51:34,799 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 7125 transitions. Word has length 937 [2021-11-23 16:51:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:34,801 INFO L470 AbstractCegarLoop]: Abstraction has 6757 states and 7125 transitions. [2021-11-23 16:51:34,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.42857142857143) internal successors, (1714), 14 states have internal predecessors, (1714), 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) [2021-11-23 16:51:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 7125 transitions. [2021-11-23 16:51:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1186 [2021-11-23 16:51:34,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:34,849 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:34,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:35,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:35,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-23 16:51:35,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:35,450 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:35,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:35,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1266316761, now seen corresponding path program 1 times [2021-11-23 16:51:35,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:35,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579173493] [2021-11-23 16:51:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:35,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:35,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:35,459 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:35,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_921de283-ba0b-451e-a664-650536b7f31b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 16:51:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:51:35,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4344 backedges. 2290 proven. 1146 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-23 16:51:47,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:31,730 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true