./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:47:58,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:47:58,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:47:58,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:47:58,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:47:58,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:47:58,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:47:58,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:47:58,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:47:58,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:47:58,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:47:58,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:47:58,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:47:58,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:47:58,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:47:58,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:47:58,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:47:58,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:47:58,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:47:58,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:47:58,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:47:58,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:47:58,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:47:58,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:47:58,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:47:58,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:47:58,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:47:58,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:47:58,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:47:58,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:47:58,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:47:58,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:47:58,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:47:58,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:47:58,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:47:58,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:47:58,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:47:58,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:47:58,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:47:58,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:47:58,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:47:58,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:47:58,519 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:47:58,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:47:58,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:47:58,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:47:58,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:47:58,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:47:58,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:47:58,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:47:58,521 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:47:58,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:47:58,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:47:58,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:47:58,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:47:58,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:47:58,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:47:58,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:47:58,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:47:58,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:47:58,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:47:58,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:47:58,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:47:58,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:47:58,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:47:58,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:47:58,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:47:58,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:47:58,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:47:58,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:47:58,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:47:58,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:47:58,525 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:47:58,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:47:58,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:47:58,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:47:58,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb [2021-12-07 00:47:58,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:47:58,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:47:58,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:47:58,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:47:58,706 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:47:58,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-12-07 00:47:58,749 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data/67472be41/e868c328f147442293f91bca36104d30/FLAGe679406c9 [2021-12-07 00:47:59,068 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:47:59,068 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-12-07 00:47:59,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data/67472be41/e868c328f147442293f91bca36104d30/FLAGe679406c9 [2021-12-07 00:47:59,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data/67472be41/e868c328f147442293f91bca36104d30 [2021-12-07 00:47:59,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:47:59,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:47:59,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:47:59,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:47:59,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:47:59,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43cff275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59, skipping insertion in model container [2021-12-07 00:47:59,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:47:59,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:47:59,611 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_797e5180-d3c2-4f8f-9dce-f2f387e93398/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2021-12-07 00:47:59,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:47:59,631 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:47:59,639 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_797e5180-d3c2-4f8f-9dce-f2f387e93398/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2021-12-07 00:47:59,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:47:59,658 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:47:59,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59 WrapperNode [2021-12-07 00:47:59,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:47:59,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:47:59,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:47:59,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:47:59,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,691 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2021-12-07 00:47:59,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:47:59,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:47:59,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:47:59,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:47:59,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:47:59,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:47:59,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:47:59,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:47:59,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (1/1) ... [2021-12-07 00:47:59,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:47:59,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:47:59,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:47:59,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:47:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:47:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:47:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:47:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:47:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:47:59,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:47:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:47:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:47:59,818 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:47:59,819 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:47:59,933 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:47:59,939 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:47:59,940 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-07 00:47:59,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:47:59 BoogieIcfgContainer [2021-12-07 00:47:59,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:47:59,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:47:59,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:47:59,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:47:59,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:47:59" (1/3) ... [2021-12-07 00:47:59,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38dbe78d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:47:59, skipping insertion in model container [2021-12-07 00:47:59,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:47:59" (2/3) ... [2021-12-07 00:47:59,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38dbe78d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:47:59, skipping insertion in model container [2021-12-07 00:47:59,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:47:59" (3/3) ... [2021-12-07 00:47:59,951 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2021-12-07 00:47:59,956 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:47:59,957 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:47:59,998 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:48:00,004 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:48:00,004 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:48:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 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) [2021-12-07 00:48:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:48:00,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:00,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:00,022 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:00,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2021-12-07 00:48:00,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:00,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791896991] [2021-12-07 00:48:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:00,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:00,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:00,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304267047] [2021-12-07 00:48:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:00,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:00,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:00,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:00,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:48:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 00:48:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:00,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:48:00,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:00,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791896991] [2021-12-07 00:48:00,197 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:00,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304267047] [2021-12-07 00:48:00,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304267047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:00,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:00,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:48:00,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787632424] [2021-12-07 00:48:00,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:00,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:48:00,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:00,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:48:00,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:48:00,241 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-07 00:48:00,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:00,253 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2021-12-07 00:48:00,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:48:00,255 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-12-07 00:48:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:00,260 INFO L225 Difference]: With dead ends: 56 [2021-12-07 00:48:00,260 INFO L226 Difference]: Without dead ends: 25 [2021-12-07 00:48:00,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:48:00,265 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:00,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-07 00:48:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-07 00:48:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 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) [2021-12-07 00:48:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-12-07 00:48:00,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2021-12-07 00:48:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:00,290 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-12-07 00:48:00,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-07 00:48:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-12-07 00:48:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:48:00,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:00,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:00,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:48:00,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-07 00:48:00,494 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2021-12-07 00:48:00,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:00,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142238964] [2021-12-07 00:48:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:00,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:00,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:00,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361585053] [2021-12-07 00:48:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:00,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:00,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:00,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:00,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:48:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:48:00,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:00,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:48:00,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:00,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142238964] [2021-12-07 00:48:00,772 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:00,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361585053] [2021-12-07 00:48:00,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361585053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:00,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:00,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:48:00,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326230741] [2021-12-07 00:48:00,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:00,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:48:00,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:48:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:48:00,775 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-07 00:48:00,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:00,803 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-12-07 00:48:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:48:00,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-12-07 00:48:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:00,805 INFO L225 Difference]: With dead ends: 48 [2021-12-07 00:48:00,805 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 00:48:00,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:48:00,807 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:00,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 00:48:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-12-07 00:48:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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) [2021-12-07 00:48:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-12-07 00:48:00,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2021-12-07 00:48:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:00,814 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-12-07 00:48:00,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-07 00:48:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-12-07 00:48:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 00:48:00,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:00,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:00,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:48:01,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:01,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:01,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2021-12-07 00:48:01,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:01,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372743548] [2021-12-07 00:48:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:01,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:01,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:01,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607807222] [2021-12-07 00:48:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:01,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:01,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:01,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:48:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:01,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:48:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:01,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:48:01,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372743548] [2021-12-07 00:48:01,187 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607807222] [2021-12-07 00:48:01,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607807222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:01,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:01,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:48:01,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351458568] [2021-12-07 00:48:01,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:01,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:48:01,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:48:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:48:01,189 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-07 00:48:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:01,237 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-12-07 00:48:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:48:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-07 00:48:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:01,238 INFO L225 Difference]: With dead ends: 67 [2021-12-07 00:48:01,238 INFO L226 Difference]: Without dead ends: 44 [2021-12-07 00:48:01,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:48:01,240 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:01,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-07 00:48:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-12-07 00:48:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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) [2021-12-07 00:48:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-12-07 00:48:01,245 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-12-07 00:48:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:01,246 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-12-07 00:48:01,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-07 00:48:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-12-07 00:48:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 00:48:01,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:01,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:01,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:48:01,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-07 00:48:01,449 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2021-12-07 00:48:01,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043616788] [2021-12-07 00:48:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:01,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:01,483 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:01,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124034268] [2021-12-07 00:48:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:01,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:01,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:01,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:48:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:01,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:48:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:01,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:48:01,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:01,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043616788] [2021-12-07 00:48:01,604 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:01,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124034268] [2021-12-07 00:48:01,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124034268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:01,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:01,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:48:01,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272157568] [2021-12-07 00:48:01,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:01,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:48:01,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:01,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:48:01,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:48:01,606 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-07 00:48:01,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:01,643 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2021-12-07 00:48:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:48:01,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2021-12-07 00:48:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:01,644 INFO L225 Difference]: With dead ends: 67 [2021-12-07 00:48:01,644 INFO L226 Difference]: Without dead ends: 41 [2021-12-07 00:48:01,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:48:01,646 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:01,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-07 00:48:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-12-07 00:48:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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) [2021-12-07 00:48:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-12-07 00:48:01,653 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2021-12-07 00:48:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:01,654 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-12-07 00:48:01,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-07 00:48:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-12-07 00:48:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 00:48:01,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:01,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:01,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:48:01,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:01,856 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2021-12-07 00:48:01,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:01,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379463174] [2021-12-07 00:48:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:01,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:01,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:01,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340938150] [2021-12-07 00:48:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:01,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:01,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:01,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:01,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:48:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:01,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:48:01,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:01,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:48:01,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:01,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379463174] [2021-12-07 00:48:01,977 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:01,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340938150] [2021-12-07 00:48:01,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340938150] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:01,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:01,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 00:48:01,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685987816] [2021-12-07 00:48:01,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:01,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:48:01,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:48:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:48:01,979 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-12-07 00:48:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:02,051 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-12-07 00:48:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:48:02,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 18 [2021-12-07 00:48:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:02,052 INFO L225 Difference]: With dead ends: 91 [2021-12-07 00:48:02,052 INFO L226 Difference]: Without dead ends: 62 [2021-12-07 00:48:02,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:48:02,053 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:02,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 51 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-07 00:48:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-12-07 00:48:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 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) [2021-12-07 00:48:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-12-07 00:48:02,063 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2021-12-07 00:48:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:02,064 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-12-07 00:48:02,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-12-07 00:48:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-12-07 00:48:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 00:48:02,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:02,065 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:02,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:48:02,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:02,266 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:02,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2021-12-07 00:48:02,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:02,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949320756] [2021-12-07 00:48:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:02,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:02,303 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:02,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467180336] [2021-12-07 00:48:02,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:48:02,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:02,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:02,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:02,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:48:02,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 00:48:02,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:02,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:48:02,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:48:02,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:48:02,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:02,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949320756] [2021-12-07 00:48:02,375 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:02,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467180336] [2021-12-07 00:48:02,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467180336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:48:02,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:48:02,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:48:02,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60597436] [2021-12-07 00:48:02,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:48:02,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:48:02,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:48:02,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:48:02,376 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-07 00:48:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:02,405 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2021-12-07 00:48:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:48:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 [2021-12-07 00:48:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:02,407 INFO L225 Difference]: With dead ends: 121 [2021-12-07 00:48:02,407 INFO L226 Difference]: Without dead ends: 100 [2021-12-07 00:48:02,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:48:02,408 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:02,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:48:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-07 00:48:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2021-12-07 00:48:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 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) [2021-12-07 00:48:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-12-07 00:48:02,416 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2021-12-07 00:48:02,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:02,416 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-12-07 00:48:02,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-07 00:48:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-12-07 00:48:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 00:48:02,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:02,417 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:02,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:48:02,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:02,619 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:02,621 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2021-12-07 00:48:02,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:02,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536292974] [2021-12-07 00:48:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:02,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:02,651 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:02,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023393429] [2021-12-07 00:48:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:02,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:02,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:02,655 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:02,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:48:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:48:02,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:48:02,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:48:02,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:48:02,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:02,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536292974] [2021-12-07 00:48:02,878 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:02,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023393429] [2021-12-07 00:48:02,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023393429] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:02,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:02,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-07 00:48:02,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983530748] [2021-12-07 00:48:02,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:02,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:48:02,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:02,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:48:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:48:02,880 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2021-12-07 00:48:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:03,059 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2021-12-07 00:48:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:48:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 39 [2021-12-07 00:48:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:03,060 INFO L225 Difference]: With dead ends: 166 [2021-12-07 00:48:03,060 INFO L226 Difference]: Without dead ends: 115 [2021-12-07 00:48:03,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:48:03,062 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 305 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:03,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 86 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:48:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-07 00:48:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-12-07 00:48:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 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) [2021-12-07 00:48:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2021-12-07 00:48:03,073 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2021-12-07 00:48:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:03,073 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2021-12-07 00:48:03,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2021-12-07 00:48:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2021-12-07 00:48:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-07 00:48:03,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:03,075 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:03,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:48:03,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 00:48:03,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2021-12-07 00:48:03,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:03,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094563420] [2021-12-07 00:48:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:03,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:03,318 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:03,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763685855] [2021-12-07 00:48:03,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:48:03,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:03,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:03,322 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:03,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:48:03,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:48:03,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:03,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:48:03,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-07 00:48:03,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-07 00:48:03,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:03,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094563420] [2021-12-07 00:48:03,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:03,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763685855] [2021-12-07 00:48:03,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763685855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:03,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:03,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-07 00:48:03,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657188388] [2021-12-07 00:48:03,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:03,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 00:48:03,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 00:48:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-07 00:48:03,773 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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) [2021-12-07 00:48:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:04,173 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2021-12-07 00:48:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 00:48:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 63 [2021-12-07 00:48:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:04,175 INFO L225 Difference]: With dead ends: 316 [2021-12-07 00:48:04,175 INFO L226 Difference]: Without dead ends: 223 [2021-12-07 00:48:04,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:48:04,177 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 711 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:04,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 158 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:48:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-07 00:48:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2021-12-07 00:48:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 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) [2021-12-07 00:48:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2021-12-07 00:48:04,192 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2021-12-07 00:48:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:04,192 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2021-12-07 00:48:04,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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) [2021-12-07 00:48:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2021-12-07 00:48:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-07 00:48:04,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:04,194 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:04,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:48:04,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:04,394 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2021-12-07 00:48:04,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:04,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797130864] [2021-12-07 00:48:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:04,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:04,407 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:04,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279873054] [2021-12-07 00:48:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:48:04,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:04,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:04,409 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:04,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:48:04,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-07 00:48:04,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:04,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:48:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:48:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-12-07 00:48:04,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:48:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-12-07 00:48:04,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:48:04,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797130864] [2021-12-07 00:48:04,869 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:48:04,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279873054] [2021-12-07 00:48:04,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279873054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:48:04,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:48:04,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 00:48:04,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001887874] [2021-12-07 00:48:04,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:48:04,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:48:04,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:48:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:48:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:48:04,875 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2021-12-07 00:48:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:48:04,985 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2021-12-07 00:48:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:48:04,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 111 [2021-12-07 00:48:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:48:04,989 INFO L225 Difference]: With dead ends: 852 [2021-12-07 00:48:04,989 INFO L226 Difference]: Without dead ends: 703 [2021-12-07 00:48:04,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:48:04,990 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:48:04,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:48:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-12-07 00:48:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2021-12-07 00:48:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 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) [2021-12-07 00:48:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2021-12-07 00:48:05,021 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2021-12-07 00:48:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:48:05,021 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2021-12-07 00:48:05,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2021-12-07 00:48:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2021-12-07 00:48:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-07 00:48:05,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:48:05,028 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:48:05,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-07 00:48:05,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:48:05,230 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:48:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:48:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2021-12-07 00:48:05,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:48:05,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676693819] [2021-12-07 00:48:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:48:05,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:48:05,385 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:48:05,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467137606] [2021-12-07 00:48:05,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:48:05,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:48:05,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:48:05,387 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:48:05,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:48:05,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:48:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:48:05,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 275 conjunts are in the unsatisfiable core [2021-12-07 00:48:05,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:42,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-12-07 00:50:42,200 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-07 00:50:42,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:50:42,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676693819] [2021-12-07 00:50:42,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:50:42,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467137606] [2021-12-07 00:50:42,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-07 00:50:42,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:42,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-07 00:50:42,201 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-07 00:50:42,201 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-07 00:50:42,208 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-07 00:50:42,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:50:42,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:50:42,421 INFO L732 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1] [2021-12-07 00:50:42,428 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-07 00:50:42,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:50:42 BoogieIcfgContainer [2021-12-07 00:50:42,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-07 00:50:42,520 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 00:50:42,520 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 00:50:42,520 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 00:50:42,520 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:47:59" (3/4) ... [2021-12-07 00:50:42,522 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-07 00:50:42,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 00:50:42,523 INFO L158 Benchmark]: Toolchain (without parser) took 163041.52ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 88.0MB in the beginning and 72.9MB in the end (delta: 15.1MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2021-12-07 00:50:42,523 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 41.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:50:42,523 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.25ms. Allocated memory is still 111.1MB. Free memory was 87.8MB in the beginning and 77.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 00:50:42,523 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.29ms. Allocated memory is still 111.1MB. Free memory was 77.4MB in the beginning and 75.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 00:50:42,524 INFO L158 Benchmark]: Boogie Preprocessor took 24.68ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 74.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:50:42,524 INFO L158 Benchmark]: RCFGBuilder took 224.04ms. Allocated memory is still 111.1MB. Free memory was 74.6MB in the beginning and 63.5MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-07 00:50:42,524 INFO L158 Benchmark]: TraceAbstraction took 162575.74ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 63.0MB in the beginning and 72.9MB in the end (delta: -9.9MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2021-12-07 00:50:42,524 INFO L158 Benchmark]: Witness Printer took 2.81ms. Allocated memory is still 134.2MB. Free memory is still 72.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:50:42,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 41.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.25ms. Allocated memory is still 111.1MB. Free memory was 87.8MB in the beginning and 77.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.29ms. Allocated memory is still 111.1MB. Free memory was 77.4MB in the beginning and 75.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.68ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 74.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 224.04ms. Allocated memory is still 111.1MB. Free memory was 74.6MB in the beginning and 63.5MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 162575.74ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 63.0MB in the beginning and 72.9MB in the end (delta: -9.9MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. * Witness Printer took 2.81ms. Allocated memory is still 134.2MB. Free memory is still 72.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] int i,j,k; [L17] int m=1000,n=1500,p=1800; [L18] int A [m][n][p]; [L19] int min; [L22] i=0 [L23] j=0 [L24] k=0 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND FALSE !(i < m) [L40] i=0 [L41] j=0 [L42] k=0 [L43] EXPR A [0][0][0] [L43] min=A [0][0][0] [L44] COND TRUE i < m [L45] j=0 [L46] k=0 [L47] COND TRUE j < n [L48] k=0 [L49] COND TRUE k < p [L50] EXPR A[i][j][k] [L50] COND TRUE A[i][j][k]=min) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 162.4s, OverallIterations: 10, TraceHistogramMax: 88, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1571 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1571 mSDsluCounter, 580 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 346 mSDsCounter, 608 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 391 IncrementalHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 608 mSolverCounterUnsat, 234 mSDtfsCounter, 391 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=480occurred in iteration=9, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 368 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 157.8s InterpolantComputationTime, 716 NumberOfCodeBlocks, 522 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 523 ConstructedInterpolants, 0 QuantifiedInterpolants, 1623 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1954 ConjunctsInSsa, 316 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 2311/2445 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces 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_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:50:43,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:50:43,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:50:43,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:50:43,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:50:43,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:50:43,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:50:43,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:50:43,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:50:43,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:50:43,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:50:43,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:50:43,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:50:43,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:50:43,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:50:43,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:50:43,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:50:43,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:50:43,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:50:43,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:50:43,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:50:43,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:50:43,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:50:43,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:50:43,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:50:43,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:50:43,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:50:43,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:50:43,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:50:43,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:50:43,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:50:43,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:50:43,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:50:43,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:50:43,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:50:43,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:50:43,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:50:43,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:50:43,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:50:43,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:50:43,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:50:43,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-07 00:50:43,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:50:43,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:50:43,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:50:43,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:50:43,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:50:43,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:50:43,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:50:43,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:50:43,946 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:50:43,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:50:43,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:50:43,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:50:43,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:50:43,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:50:43,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:50:43,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:50:43,947 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 00:50:43,948 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 00:50:43,948 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 00:50:43,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:50:43,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:50:43,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:50:43,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:50:43,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:50:43,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:50:43,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:50:43,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:50:43,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:50:43,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:50:43,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:50:43,950 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 00:50:43,950 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 00:50:43,951 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:50:43,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:50:43,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:50:43,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:50:43,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 00:50:43,952 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_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb [2021-12-07 00:50:44,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:50:44,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:50:44,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:50:44,199 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:50:44,200 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:50:44,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-12-07 00:50:44,240 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data/ce7dc8689/5796841863f94dfc9a7c97464684b0e8/FLAG97e8657f0 [2021-12-07 00:50:44,607 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:50:44,608 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-12-07 00:50:44,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data/ce7dc8689/5796841863f94dfc9a7c97464684b0e8/FLAG97e8657f0 [2021-12-07 00:50:44,623 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/data/ce7dc8689/5796841863f94dfc9a7c97464684b0e8 [2021-12-07 00:50:44,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:50:44,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:50:44,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:50:44,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:50:44,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:50:44,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4038e8da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44, skipping insertion in model container [2021-12-07 00:50:44,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:50:44,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:50:44,741 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_797e5180-d3c2-4f8f-9dce-f2f387e93398/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2021-12-07 00:50:44,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:50:44,767 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:50:44,782 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_797e5180-d3c2-4f8f-9dce-f2f387e93398/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2021-12-07 00:50:44,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:50:44,810 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:50:44,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44 WrapperNode [2021-12-07 00:50:44,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:50:44,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:50:44,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:50:44,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:50:44,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,840 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2021-12-07 00:50:44,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:50:44,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:50:44,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:50:44,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:50:44,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:50:44,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:50:44,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:50:44,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:50:44,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (1/1) ... [2021-12-07 00:50:44,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:50:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:44,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:50:44,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:50:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:50:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 00:50:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:50:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-07 00:50:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:50:44,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:50:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:50:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-07 00:50:44,988 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:50:44,989 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:50:45,312 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:50:45,318 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:50:45,318 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-07 00:50:45,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:50:45 BoogieIcfgContainer [2021-12-07 00:50:45,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:50:45,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:50:45,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:50:45,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:50:45,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:50:44" (1/3) ... [2021-12-07 00:50:45,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ffede5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:50:45, skipping insertion in model container [2021-12-07 00:50:45,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:44" (2/3) ... [2021-12-07 00:50:45,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ffede5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:50:45, skipping insertion in model container [2021-12-07 00:50:45,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:50:45" (3/3) ... [2021-12-07 00:50:45,332 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2021-12-07 00:50:45,338 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:50:45,338 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:50:45,372 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:50:45,378 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:50:45,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:50:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 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) [2021-12-07 00:50:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:50:45,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:45,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:45,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2021-12-07 00:50:45,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:45,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264034899] [2021-12-07 00:50:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:45,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:45,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:45,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:45,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 00:50:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:45,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 00:50:45,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:45,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:45,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:45,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264034899] [2021-12-07 00:50:45,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264034899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:45,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:45,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:50:45,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142319391] [2021-12-07 00:50:45,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:45,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:50:45,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:50:45,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:50:45,556 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-07 00:50:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:45,569 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2021-12-07 00:50:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:50:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-12-07 00:50:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:45,577 INFO L225 Difference]: With dead ends: 56 [2021-12-07 00:50:45,577 INFO L226 Difference]: Without dead ends: 25 [2021-12-07 00:50:45,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:50:45,582 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:45,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:50:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-07 00:50:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-07 00:50:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 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) [2021-12-07 00:50:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-12-07 00:50:45,606 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2021-12-07 00:50:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:45,607 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-12-07 00:50:45,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-07 00:50:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-12-07 00:50:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:50:45,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:45,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:45,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:50:45,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:45,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2021-12-07 00:50:45,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:45,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449165680] [2021-12-07 00:50:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:45,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:45,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:45,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:45,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 00:50:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:45,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:50:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:45,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:45,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:45,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449165680] [2021-12-07 00:50:45,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449165680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:45,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:45,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:50:45,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516127230] [2021-12-07 00:50:45,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:45,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:50:45,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:50:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:50:45,914 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-07 00:50:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:46,157 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-12-07 00:50:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:50:46,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-12-07 00:50:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:46,164 INFO L225 Difference]: With dead ends: 48 [2021-12-07 00:50:46,164 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 00:50:46,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:50:46,165 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:46,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:50:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 00:50:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-12-07 00:50:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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) [2021-12-07 00:50:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-12-07 00:50:46,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2021-12-07 00:50:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:46,170 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-12-07 00:50:46,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-07 00:50:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-12-07 00:50:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 00:50:46,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:46,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:46,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 00:50:46,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:46,373 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2021-12-07 00:50:46,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:46,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810638446] [2021-12-07 00:50:46,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:46,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:46,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:46,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:46,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 00:50:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:46,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:50:46,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:46,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:46,477 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:46,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810638446] [2021-12-07 00:50:46,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810638446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:46,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:46,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:50:46,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136708611] [2021-12-07 00:50:46,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:46,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:50:46,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:50:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:46,479 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-07 00:50:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:46,718 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-12-07 00:50:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:50:46,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-07 00:50:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:46,720 INFO L225 Difference]: With dead ends: 67 [2021-12-07 00:50:46,720 INFO L226 Difference]: Without dead ends: 44 [2021-12-07 00:50:46,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:46,722 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:46,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:50:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-07 00:50:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-12-07 00:50:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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) [2021-12-07 00:50:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-12-07 00:50:46,730 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-12-07 00:50:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:46,731 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-12-07 00:50:46,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-07 00:50:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-12-07 00:50:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 00:50:46,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:46,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:46,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 00:50:46,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:46,934 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:46,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2021-12-07 00:50:46,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:46,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707554791] [2021-12-07 00:50:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:46,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:46,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:46,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:46,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 00:50:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:47,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:50:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:47,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:47,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:47,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707554791] [2021-12-07 00:50:47,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707554791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:47,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:47,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:50:47,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461667908] [2021-12-07 00:50:47,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:47,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:50:47,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:47,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:50:47,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:47,034 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-07 00:50:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:47,263 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2021-12-07 00:50:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:50:47,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2021-12-07 00:50:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:47,264 INFO L225 Difference]: With dead ends: 67 [2021-12-07 00:50:47,264 INFO L226 Difference]: Without dead ends: 41 [2021-12-07 00:50:47,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:47,265 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:47,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:50:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-07 00:50:47,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-12-07 00:50:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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) [2021-12-07 00:50:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-12-07 00:50:47,274 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2021-12-07 00:50:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:47,274 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-12-07 00:50:47,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-07 00:50:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-12-07 00:50:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 00:50:47,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:47,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:47,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 00:50:47,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:47,478 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2021-12-07 00:50:47,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:47,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281447566] [2021-12-07 00:50:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:47,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:47,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:47,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:47,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 00:50:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:47,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:50:47,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:47,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:47,635 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:47,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281447566] [2021-12-07 00:50:47,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281447566] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:50:47,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:50:47,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 00:50:47,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663062622] [2021-12-07 00:50:47,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:50:47,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:50:47,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:50:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:50:47,637 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-12-07 00:50:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:48,135 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-12-07 00:50:48,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:50:48,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 18 [2021-12-07 00:50:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:48,136 INFO L225 Difference]: With dead ends: 91 [2021-12-07 00:50:48,136 INFO L226 Difference]: Without dead ends: 62 [2021-12-07 00:50:48,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:50:48,137 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:48,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 68 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:50:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-07 00:50:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-12-07 00:50:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 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) [2021-12-07 00:50:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-12-07 00:50:48,149 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2021-12-07 00:50:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:48,150 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-12-07 00:50:48,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-12-07 00:50:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-12-07 00:50:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 00:50:48,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:48,151 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:48,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 00:50:48,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:48,352 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:48,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2021-12-07 00:50:48,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:48,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969111084] [2021-12-07 00:50:48,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:50:48,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:48,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:48,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 00:50:48,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 00:50:48,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:50:48,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:50:48,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:50:48,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:48,492 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969111084] [2021-12-07 00:50:48,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969111084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:48,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:48,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:50:48,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930754653] [2021-12-07 00:50:48,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:48,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:50:48,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:50:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:48,494 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-07 00:50:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:48,797 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2021-12-07 00:50:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:50:48,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 [2021-12-07 00:50:48,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:48,805 INFO L225 Difference]: With dead ends: 121 [2021-12-07 00:50:48,805 INFO L226 Difference]: Without dead ends: 100 [2021-12-07 00:50:48,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:48,806 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:48,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:50:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-07 00:50:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2021-12-07 00:50:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 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) [2021-12-07 00:50:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-12-07 00:50:48,815 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2021-12-07 00:50:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:48,815 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-12-07 00:50:48,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-07 00:50:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-12-07 00:50:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 00:50:48,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:48,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:48,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-07 00:50:49,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:49,018 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2021-12-07 00:50:49,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:49,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861270019] [2021-12-07 00:50:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:49,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:49,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:49,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:49,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 00:50:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:50:49,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:50:49,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:50:49,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861270019] [2021-12-07 00:50:49,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861270019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:50:49,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:50:49,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-07 00:50:49,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868174833] [2021-12-07 00:50:49,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:50:49,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:50:49,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:49,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:50:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:50:49,414 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2021-12-07 00:50:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:50,938 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2021-12-07 00:50:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:50:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 39 [2021-12-07 00:50:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:50,939 INFO L225 Difference]: With dead ends: 166 [2021-12-07 00:50:50,939 INFO L226 Difference]: Without dead ends: 115 [2021-12-07 00:50:50,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:50:50,940 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 363 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:50,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 198 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-07 00:50:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-07 00:50:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-12-07 00:50:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 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) [2021-12-07 00:50:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2021-12-07 00:50:50,952 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2021-12-07 00:50:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:50,952 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2021-12-07 00:50:50,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2021-12-07 00:50:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2021-12-07 00:50:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-07 00:50:50,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:50,954 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:50,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 00:50:51,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:51,158 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2021-12-07 00:50:51,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:51,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745959484] [2021-12-07 00:50:51,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:50:51,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:51,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:51,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:51,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-07 00:50:51,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:50:51,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:50:51,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:50:51,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-07 00:50:51,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-07 00:50:52,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:52,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745959484] [2021-12-07 00:50:52,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745959484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:50:52,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:50:52,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-07 00:50:52,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754764506] [2021-12-07 00:50:52,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:50:52,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 00:50:52,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 00:50:52,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-07 00:50:52,171 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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) [2021-12-07 00:50:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:56,920 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2021-12-07 00:50:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 00:50:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 63 [2021-12-07 00:50:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:56,922 INFO L225 Difference]: With dead ends: 316 [2021-12-07 00:50:56,922 INFO L226 Difference]: Without dead ends: 223 [2021-12-07 00:50:56,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:50:56,924 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1416 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:56,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1416 Valid, 678 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-07 00:50:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-07 00:50:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2021-12-07 00:50:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 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) [2021-12-07 00:50:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2021-12-07 00:50:56,942 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2021-12-07 00:50:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:56,942 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2021-12-07 00:50:56,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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) [2021-12-07 00:50:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2021-12-07 00:50:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-07 00:50:56,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:56,944 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:56,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-07 00:50:57,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:57,146 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:57,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2021-12-07 00:50:57,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:57,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543151587] [2021-12-07 00:50:57,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:50:57,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:57,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:57,153 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:57,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 00:50:57,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-07 00:50:57,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:50:57,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:50:57,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-12-07 00:50:57,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-12-07 00:50:57,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:57,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543151587] [2021-12-07 00:50:57,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543151587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:50:57,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:50:57,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 00:50:57,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557089060] [2021-12-07 00:50:57,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:50:57,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:50:57,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:50:57,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:50:57,932 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2021-12-07 00:50:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:58,451 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2021-12-07 00:50:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:50:58,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 111 [2021-12-07 00:50:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:58,455 INFO L225 Difference]: With dead ends: 852 [2021-12-07 00:50:58,455 INFO L226 Difference]: Without dead ends: 703 [2021-12-07 00:50:58,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:50:58,456 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 267 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:58,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 97 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:50:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-12-07 00:50:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2021-12-07 00:50:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 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) [2021-12-07 00:50:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2021-12-07 00:50:58,506 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2021-12-07 00:50:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:58,507 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2021-12-07 00:50:58,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2021-12-07 00:50:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2021-12-07 00:50:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-07 00:50:58,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:58,515 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:58,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 00:50:58,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:58,716 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2021-12-07 00:50:58,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:58,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568019180] [2021-12-07 00:50:58,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:50:58,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:58,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:58,728 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:58,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 00:50:59,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:50:59,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:50:59,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 00:50:59,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16128 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 14277 trivial. 0 not checked. [2021-12-07 00:50:59,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16128 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 14277 trivial. 0 not checked. [2021-12-07 00:51:01,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:51:01,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568019180] [2021-12-07 00:51:01,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568019180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:51:01,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:51:01,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-07 00:51:01,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50362529] [2021-12-07 00:51:01,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:01,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 00:51:01,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:51:02,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 00:51:02,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 00:51:02,001 INFO L87 Difference]: Start difference. First operand 480 states and 609 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 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) [2021-12-07 00:51:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:19,934 INFO L93 Difference]: Finished difference Result 1503 states and 2052 transitions. [2021-12-07 00:51:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-07 00:51:19,934 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 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 411 [2021-12-07 00:51:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:19,938 INFO L225 Difference]: With dead ends: 1503 [2021-12-07 00:51:19,938 INFO L226 Difference]: Without dead ends: 1027 [2021-12-07 00:51:19,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1823, Invalid=3433, Unknown=0, NotChecked=0, Total=5256 [2021-12-07 00:51:19,941 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 4502 mSDsluCounter, 2402 mSDsCounter, 0 mSdLazyCounter, 3585 mSolverCounterSat, 1683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4502 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1683 IncrementalHoareTripleChecker+Valid, 3585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:19,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4502 Valid, 2515 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1683 Valid, 3585 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2021-12-07 00:51:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-12-07 00:51:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 936. [2021-12-07 00:51:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.267379679144385) internal successors, (1185), 935 states have internal predecessors, (1185), 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) [2021-12-07 00:51:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1185 transitions. [2021-12-07 00:51:19,989 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1185 transitions. Word has length 411 [2021-12-07 00:51:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:19,990 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1185 transitions. [2021-12-07 00:51:19,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 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) [2021-12-07 00:51:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1185 transitions. [2021-12-07 00:51:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2021-12-07 00:51:20,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:20,007 INFO L514 BasicCegarLoop]: trace histogram [184, 184, 184, 184, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:51:20,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-07 00:51:20,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:51:20,209 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:20,211 INFO L85 PathProgramCache]: Analyzing trace with hash 788549945, now seen corresponding path program 5 times [2021-12-07 00:51:20,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:51:20,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646228869] [2021-12-07 00:51:20,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:51:20,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:51:20,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:51:20,221 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:51:20,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-07 00:54:03,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 189 check-sat command(s) [2021-12-07 00:54:03,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:54:03,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1960 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:54:03,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 68928 backedges. 32239 proven. 1 refuted. 0 times theorem prover too weak. 36688 trivial. 0 not checked. [2021-12-07 00:54:04,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 68928 backedges. 25793 proven. 6447 refuted. 0 times theorem prover too weak. 36688 trivial. 0 not checked. [2021-12-07 00:54:06,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:54:06,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646228869] [2021-12-07 00:54:06,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646228869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:54:06,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:54:06,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-12-07 00:54:06,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241738945] [2021-12-07 00:54:06,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:54:06,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:54:06,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:54:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:54:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:54:06,595 INFO L87 Difference]: Start difference. First operand 936 states and 1185 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 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) [2021-12-07 00:54:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:07,326 INFO L93 Difference]: Finished difference Result 4529 states and 5766 transitions. [2021-12-07 00:54:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:54:07,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 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 795 [2021-12-07 00:54:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:07,346 INFO L225 Difference]: With dead ends: 4529 [2021-12-07 00:54:07,346 INFO L226 Difference]: Without dead ends: 3646 [2021-12-07 00:54:07,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1591 GetRequests, 1581 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:54:07,348 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 211 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:07,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 80 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:54:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2021-12-07 00:54:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3639. [2021-12-07 00:54:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 1.265805387575591) internal successors, (4605), 3638 states have internal predecessors, (4605), 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) [2021-12-07 00:54:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 4605 transitions. [2021-12-07 00:54:07,554 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 4605 transitions. Word has length 795 [2021-12-07 00:54:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:07,554 INFO L470 AbstractCegarLoop]: Abstraction has 3639 states and 4605 transitions. [2021-12-07 00:54:07,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 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) [2021-12-07 00:54:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 4605 transitions. [2021-12-07 00:54:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3076 [2021-12-07 00:54:07,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:07,641 INFO L514 BasicCegarLoop]: trace histogram [736, 736, 736, 736, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:07,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-07 00:54:07,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:54:07,842 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:07,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:07,846 INFO L85 PathProgramCache]: Analyzing trace with hash -985540095, now seen corresponding path program 6 times [2021-12-07 00:54:07,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:54:07,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603619687] [2021-12-07 00:54:07,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:54:07,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:54:07,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:54:07,874 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:54:07,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 00:54:08,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-07 00:54:08,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:54:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:54:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:12,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:54:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1106364 backedges. 1509 proven. 0 refuted. 0 times theorem prover too weak. 1104855 trivial. 0 not checked. [2021-12-07 00:54:13,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:54:13,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:54:13,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603619687] [2021-12-07 00:54:13,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603619687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:13,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:13,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:54:13,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519229481] [2021-12-07 00:54:13,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:13,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:54:13,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:54:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:54:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:54:13,830 INFO L87 Difference]: Start difference. First operand 3639 states and 4605 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-12-07 00:54:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:14,270 INFO L93 Difference]: Finished difference Result 7034 states and 9131 transitions. [2021-12-07 00:54:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:54:14,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 3075 [2021-12-07 00:54:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:14,287 INFO L225 Difference]: With dead ends: 7034 [2021-12-07 00:54:14,288 INFO L226 Difference]: Without dead ends: 4199 [2021-12-07 00:54:14,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3075 GetRequests, 3069 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:54:14,291 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:14,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 43 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:54:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-12-07 00:54:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3639. [2021-12-07 00:54:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 1.2655305112699284) internal successors, (4604), 3638 states have internal predecessors, (4604), 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) [2021-12-07 00:54:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 4604 transitions. [2021-12-07 00:54:14,494 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 4604 transitions. Word has length 3075 [2021-12-07 00:54:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:14,495 INFO L470 AbstractCegarLoop]: Abstraction has 3639 states and 4604 transitions. [2021-12-07 00:54:14,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-12-07 00:54:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 4604 transitions. [2021-12-07 00:54:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3076 [2021-12-07 00:54:14,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:14,539 INFO L514 BasicCegarLoop]: trace histogram [736, 736, 736, 735, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:14,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-07 00:54:14,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:54:14,739 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -227702337, now seen corresponding path program 1 times [2021-12-07 00:54:14,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:54:14,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228807213] [2021-12-07 00:54:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:14,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:54:14,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:54:14,747 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:54:14,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-07 00:54:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 7575 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:54:20,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1106364 backedges. 33158 proven. 1081 refuted. 0 times theorem prover too weak. 1072125 trivial. 0 not checked. [2021-12-07 00:54:22,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1106364 backedges. 33158 proven. 1081 refuted. 0 times theorem prover too weak. 1072125 trivial. 0 not checked. [2021-12-07 00:54:31,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:54:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228807213] [2021-12-07 00:54:31,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228807213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:54:31,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:54:31,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2021-12-07 00:54:31,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803906739] [2021-12-07 00:54:31,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:54:31,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-07 00:54:31,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:54:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-07 00:54:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=7009, Unknown=0, NotChecked=0, Total=9506 [2021-12-07 00:54:31,654 INFO L87 Difference]: Start difference. First operand 3639 states and 4604 transitions. Second operand has 98 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 98 states have internal predecessors, (127), 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) [2021-12-07 00:55:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:56,182 INFO L93 Difference]: Finished difference Result 11062 states and 15586 transitions. [2021-12-07 00:55:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-07 00:55:56,182 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 98 states have internal predecessors, (127), 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 3075 [2021-12-07 00:55:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:56,209 INFO L225 Difference]: With dead ends: 11062 [2021-12-07 00:55:56,209 INFO L226 Difference]: Without dead ends: 7474 [2021-12-07 00:55:56,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6195 GetRequests, 6052 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=7103, Invalid=13777, Unknown=0, NotChecked=0, Total=20880 [2021-12-07 00:55:56,218 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 14955 mSDsluCounter, 9410 mSDsCounter, 0 mSdLazyCounter, 14097 mSolverCounterSat, 4713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14955 SdHoareTripleChecker+Valid, 9619 SdHoareTripleChecker+Invalid, 18810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4713 IncrementalHoareTripleChecker+Valid, 14097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:56,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14955 Valid, 9619 Invalid, 18810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4713 Valid, 14097 Invalid, 0 Unknown, 0 Unchecked, 38.7s Time] [2021-12-07 00:55:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2021-12-07 00:55:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 7287. [2021-12-07 00:55:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7287 states, 7286 states have (on average 1.2643425748009882) internal successors, (9212), 7286 states have internal predecessors, (9212), 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) [2021-12-07 00:55:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7287 states to 7287 states and 9212 transitions. [2021-12-07 00:55:56,611 INFO L78 Accepts]: Start accepts. Automaton has 7287 states and 9212 transitions. Word has length 3075 [2021-12-07 00:55:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:56,612 INFO L470 AbstractCegarLoop]: Abstraction has 7287 states and 9212 transitions. [2021-12-07 00:55:56,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 98 states have internal predecessors, (127), 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) [2021-12-07 00:55:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7287 states and 9212 transitions. [2021-12-07 00:55:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6148 [2021-12-07 00:55:56,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:56,791 INFO L514 BasicCegarLoop]: trace histogram [1504, 1504, 1504, 1503, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:56,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-07 00:55:56,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:55:56,992 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:56,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash -402658881, now seen corresponding path program 2 times [2021-12-07 00:55:57,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:55:57,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650043592] [2021-12-07 00:55:57,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:55:57,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:55:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:55:57,012 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:55:57,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_797e5180-d3c2-4f8f-9dce-f2f387e93398/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 00:56:07,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:56:07,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:56:09,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 15255 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-07 00:56:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4570044 backedges. 135398 proven. 4465 refuted. 0 times theorem prover too weak. 4430181 trivial. 0 not checked. [2021-12-07 00:56:16,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4570044 backedges. 135398 proven. 4465 refuted. 0 times theorem prover too weak. 4430181 trivial. 0 not checked. [2021-12-07 00:56:44,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:56:44,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650043592] [2021-12-07 00:56:44,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650043592] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:44,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:56:44,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2021-12-07 00:56:44,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349134557] [2021-12-07 00:56:44,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:44,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-12-07 00:56:44,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:56:44,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-12-07 00:56:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9601, Invalid=27841, Unknown=0, NotChecked=0, Total=37442 [2021-12-07 00:56:44,817 INFO L87 Difference]: Start difference. First operand 7287 states and 9212 transitions. Second operand has 194 states, 194 states have (on average 1.1494845360824741) internal successors, (223), 194 states have internal predecessors, (223), 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)