./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:51:13,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:51:13,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:51:13,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:51:13,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:51:13,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:51:13,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:51:13,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:51:13,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:51:13,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:51:13,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:51:13,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:51:13,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:51:13,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:51:13,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:51:13,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:51:13,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:51:13,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:51:13,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:51:13,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:51:13,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:51:13,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:51:13,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:51:13,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:51:13,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:51:13,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:51:13,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:51:13,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:51:13,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:51:13,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:51:13,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:51:13,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:51:13,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:51:13,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:51:13,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:51:13,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:51:13,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:51:13,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:51:13,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:51:13,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:51:13,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:51:13,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:51:13,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:51:13,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:51:13,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:51:13,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:51:13,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:51:13,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:51:13,550 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:51:13,550 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:51:13,550 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:51:13,551 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:51:13,552 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:51:13,552 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:51:13,553 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:51:13,553 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:51:13,553 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:51:13,554 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:51:13,554 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:51:13,554 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:51:13,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:51:13,555 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:51:13,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:51:13,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:51:13,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:51:13,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:51:13,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:51:13,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:51:13,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:51:13,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:51:13,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:51:13,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:51:13,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:51:13,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:51:13,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:51:13,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:51:13,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:51:13,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:51:13,562 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:51:13,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:51:13,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:51:13,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:51:13,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:51:13,564 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a [2021-11-23 16:51:13,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:51:14,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:51:14,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:51:14,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:51:14,052 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:51:14,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-acceleration/array_3-2.i [2021-11-23 16:51:14,142 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data/16e5aae00/d138100067dd4703aad6da991a259f5b/FLAG6fbcbf15a [2021-11-23 16:51:14,709 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:51:14,710 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/sv-benchmarks/c/loop-acceleration/array_3-2.i [2021-11-23 16:51:14,725 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data/16e5aae00/d138100067dd4703aad6da991a259f5b/FLAG6fbcbf15a [2021-11-23 16:51:15,064 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data/16e5aae00/d138100067dd4703aad6da991a259f5b [2021-11-23 16:51:15,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:51:15,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:51:15,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:51:15,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:51:15,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:51:15,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ccbe946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15, skipping insertion in model container [2021-11-23 16:51:15,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:51:15,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:51:15,350 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_5287e715-9c11-4f09-9426-71dfc60fd9c1/sv-benchmarks/c/loop-acceleration/array_3-2.i[809,822] [2021-11-23 16:51:15,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:51:15,382 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:51:15,395 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_5287e715-9c11-4f09-9426-71dfc60fd9c1/sv-benchmarks/c/loop-acceleration/array_3-2.i[809,822] [2021-11-23 16:51:15,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:51:15,419 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:51:15,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15 WrapperNode [2021-11-23 16:51:15,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:51:15,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:51:15,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:51:15,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:51:15,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,460 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-11-23 16:51:15,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:51:15,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:51:15,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:51:15,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:51:15,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:51:15,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:51:15,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:51:15,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:51:15,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:51:15,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:15,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:51:15,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:51:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:51:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:51:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:51:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:51:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:51:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:51:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:51:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:51:15,664 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:51:15,666 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:51:15,833 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:51:15,881 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:51:15,885 INFO L158 Benchmark]: Toolchain (without parser) took 813.43ms. Allocated memory is still 111.1MB. Free memory was 72.7MB in the beginning and 73.6MB in the end (delta: -825.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:51:15,886 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 111.1MB. Free memory is still 89.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:51:15,887 INFO L158 Benchmark]: CACSL2BoogieTranslator took 343.34ms. Allocated memory is still 111.1MB. Free memory was 72.6MB in the beginning and 86.1MB in the end (delta: -13.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:51:15,888 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.15ms. Allocated memory is still 111.1MB. Free memory was 86.1MB in the beginning and 84.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:51:15,889 INFO L158 Benchmark]: Boogie Preprocessor took 47.77ms. Allocated memory is still 111.1MB. Free memory was 84.4MB in the beginning and 83.6MB in the end (delta: 804.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:51:15,891 INFO L158 Benchmark]: RCFGBuilder took 373.31ms. Allocated memory is still 111.1MB. Free memory was 83.2MB in the beginning and 73.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:51:15,895 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 111.1MB. Free memory is still 89.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 343.34ms. Allocated memory is still 111.1MB. Free memory was 72.6MB in the beginning and 86.1MB in the end (delta: -13.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.15ms. Allocated memory is still 111.1MB. Free memory was 86.1MB in the beginning and 84.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.77ms. Allocated memory is still 111.1MB. Free memory was 84.4MB in the beginning and 83.6MB in the end (delta: 804.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 373.31ms. Allocated memory is still 111.1MB. Free memory was 83.2MB in the beginning and 73.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:51:15,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:51:18,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:51:18,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:51:19,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:51:19,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:51:19,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:51:19,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:51:19,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:51:19,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:51:19,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:51:19,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:51:19,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:51:19,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:51:19,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:51:19,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:51:19,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:51:19,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:51:19,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:51:19,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:51:19,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:51:19,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:51:19,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:51:19,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:51:19,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:51:19,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:51:19,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:51:19,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:51:19,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:51:19,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:51:19,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:51:19,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:51:19,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:51:19,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:51:19,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:51:19,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:51:19,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:51:19,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:51:19,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:51:19,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:51:19,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:51:19,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:51:19,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:51:19,117 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:51:19,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:51:19,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:51:19,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:51:19,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:51:19,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:51:19,119 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:51:19,120 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:51:19,120 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:51:19,120 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:51:19,120 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:51:19,121 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:51:19,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:51:19,122 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:51:19,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:51:19,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:51:19,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:51:19,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:51:19,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:51:19,124 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:51:19,124 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:51:19,124 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:51:19,124 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:51:19,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:51:19,125 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:51:19,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:51:19,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:51:19,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:51:19,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:51:19,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:51:19,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:51:19,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:51:19,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:51:19,127 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:51:19,127 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:19,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:51:19,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:51:19,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:51:19,128 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_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a [2021-11-23 16:51:19,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:51:19,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:51:19,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:51:19,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:51:19,649 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:51:19,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-acceleration/array_3-2.i [2021-11-23 16:51:19,730 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data/22b7f9ea7/f1c6c250684043e394b8c774294241a6/FLAG541b72468 [2021-11-23 16:51:20,353 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:51:20,355 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/sv-benchmarks/c/loop-acceleration/array_3-2.i [2021-11-23 16:51:20,364 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data/22b7f9ea7/f1c6c250684043e394b8c774294241a6/FLAG541b72468 [2021-11-23 16:51:20,389 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/data/22b7f9ea7/f1c6c250684043e394b8c774294241a6 [2021-11-23 16:51:20,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:51:20,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:51:20,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:51:20,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:51:20,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:51:20,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bdd883b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20, skipping insertion in model container [2021-11-23 16:51:20,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:51:20,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:51:20,644 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_5287e715-9c11-4f09-9426-71dfc60fd9c1/sv-benchmarks/c/loop-acceleration/array_3-2.i[809,822] [2021-11-23 16:51:20,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:51:20,682 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:51:20,733 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_5287e715-9c11-4f09-9426-71dfc60fd9c1/sv-benchmarks/c/loop-acceleration/array_3-2.i[809,822] [2021-11-23 16:51:20,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:51:20,796 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:51:20,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20 WrapperNode [2021-11-23 16:51:20,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:51:20,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:51:20,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:51:20,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:51:20,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,845 INFO L137 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2021-11-23 16:51:20,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:51:20,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:51:20,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:51:20,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:51:20,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:51:20,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:51:20,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:51:20,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:51:20,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:51:20,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:20,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:51:20,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:51:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:51:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:51:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:51:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 16:51:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:51:21,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:51:21,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:51:21,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 16:51:21,102 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:51:21,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:51:21,311 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:51:21,318 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:51:21,318 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 16:51:21,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:51:21 BoogieIcfgContainer [2021-11-23 16:51:21,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:51:21,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:51:21,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:51:21,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:51:21,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:51:20" (1/3) ... [2021-11-23 16:51:21,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9855938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:51:21, skipping insertion in model container [2021-11-23 16:51:21,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20" (2/3) ... [2021-11-23 16:51:21,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9855938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:51:21, skipping insertion in model container [2021-11-23 16:51:21,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:51:21" (3/3) ... [2021-11-23 16:51:21,332 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2021-11-23 16:51:21,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:51:21,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:51:21,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:51:21,445 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:51:21,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:51:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 16:51:21,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:21,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:21,493 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:21,505 INFO L85 PathProgramCache]: Analyzing trace with hash 212441967, now seen corresponding path program 1 times [2021-11-23 16:51:21,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85454022] [2021-11-23 16:51:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:21,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:21,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:21,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:21,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:51:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:21,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 16:51:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:21,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:21,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:21,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85454022] [2021-11-23 16:51:21,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85454022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:21,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:21,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:51:21,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515429815] [2021-11-23 16:51:21,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:21,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 16:51:21,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 16:51:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:51:21,791 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:21,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:21,811 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-11-23 16:51:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 16:51:21,814 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-11-23 16:51:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:21,824 INFO L225 Difference]: With dead ends: 30 [2021-11-23 16:51:21,825 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 16:51:21,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:51:21,834 INFO L933 BasicCegarLoop]: 19 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, 19 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 [2021-11-23 16:51:21,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:51:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 16:51:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-23 16:51:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 16:51:21,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-11-23 16:51:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:21,873 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 16:51:21,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 16:51:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 16:51:21,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:21,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:21,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:22,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:22,089 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1850569592, now seen corresponding path program 1 times [2021-11-23 16:51:22,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:22,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821960036] [2021-11-23 16:51:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:22,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:22,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:22,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:22,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:51:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:51:22,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:22,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:22,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:22,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821960036] [2021-11-23 16:51:22,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821960036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:22,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:22,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:51:22,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427929933] [2021-11-23 16:51:22,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:22,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:51:22,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:51:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:51:22,217 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:22,267 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-23 16:51:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:51:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-11-23 16:51:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:22,276 INFO L225 Difference]: With dead ends: 32 [2021-11-23 16:51:22,276 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 16:51:22,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:51:22,279 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:22,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:51:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 16:51:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-11-23 16:51:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-23 16:51:22,305 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-11-23 16:51:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:22,305 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-23 16:51:22,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-23 16:51:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 16:51:22,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:22,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:22,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 16:51:22,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:22,508 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:22,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1195372026, now seen corresponding path program 1 times [2021-11-23 16:51:22,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:22,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598923466] [2021-11-23 16:51:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:22,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:22,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:22,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:22,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:51:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:22,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:51:22,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:22,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:22,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:22,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598923466] [2021-11-23 16:51:22,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598923466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:22,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1786270902] [2021-11-23 16:51:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:22,685 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:22,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:22,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:22,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 16:51:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:51:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:22,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:22,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1786270902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:22,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859123248] [2021-11-23 16:51:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:22,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:22,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:22,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:22,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 16:51:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:51:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:23,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:23,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859123248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:23,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:23,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 16:51:23,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867739594] [2021-11-23 16:51:23,146 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:23,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:51:23,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:51:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:51:23,149 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:23,295 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-23 16:51:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:51:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 12 [2021-11-23 16:51:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:23,298 INFO L225 Difference]: With dead ends: 61 [2021-11-23 16:51:23,298 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 16:51:23,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:51:23,301 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:23,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 38 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:51:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 16:51:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2021-11-23 16:51:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-23 16:51:23,318 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-11-23 16:51:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:23,319 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-23 16:51:23,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-23 16:51:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 16:51:23,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:23,323 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:23,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 16:51:23,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 16:51:23,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:23,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:23,934 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash -328971648, now seen corresponding path program 2 times [2021-11-23 16:51:23,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:23,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360046396] [2021-11-23 16:51:23,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:23,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:23,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:23,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:23,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:51:23,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 16:51:23,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:51:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 16:51:24,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:24,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:24,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360046396] [2021-11-23 16:51:24,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360046396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:24,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:24,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:51:24,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893416163] [2021-11-23 16:51:24,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:24,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:51:24,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:24,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:51:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:51:24,124 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:24,192 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-23 16:51:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:51:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 [2021-11-23 16:51:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:24,194 INFO L225 Difference]: With dead ends: 28 [2021-11-23 16:51:24,195 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 16:51:24,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:51:24,197 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:24,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:51:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 16:51:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-23 16:51:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-23 16:51:24,205 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-11-23 16:51:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:24,206 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-23 16:51:24,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-23 16:51:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 16:51:24,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:24,208 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:24,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:24,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:24,421 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash 222661349, now seen corresponding path program 1 times [2021-11-23 16:51:24,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:24,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043119200] [2021-11-23 16:51:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:24,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:24,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:24,425 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:24,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:51:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:51:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 16:51:24,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 16:51:24,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:24,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043119200] [2021-11-23 16:51:24,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043119200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:24,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1521984725] [2021-11-23 16:51:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:24,774 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:24,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:24,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:24,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 16:51:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:51:24,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 16:51:24,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 16:51:25,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1521984725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:25,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723486069] [2021-11-23 16:51:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:25,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:25,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:25,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:25,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 16:51:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:25,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:51:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 16:51:25,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 16:51:25,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723486069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:25,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:25,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 16 [2021-11-23 16:51:25,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711698965] [2021-11-23 16:51:25,445 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:25,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:51:25,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:51:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:51:25,449 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:26,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:26,101 INFO L93 Difference]: Finished difference Result 128 states and 158 transitions. [2021-11-23 16:51:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 16:51:26,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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 22 [2021-11-23 16:51:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:26,106 INFO L225 Difference]: With dead ends: 128 [2021-11-23 16:51:26,106 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 16:51:26,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=451, Unknown=0, NotChecked=0, Total=702 [2021-11-23 16:51:26,108 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 272 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:26,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 138 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:51:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 16:51:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 63. [2021-11-23 16:51:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-23 16:51:26,132 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 22 [2021-11-23 16:51:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:26,133 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-23 16:51:26,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-23 16:51:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 16:51:26,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:26,139 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:26,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:26,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:26,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 16:51:26,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:26,745 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1418059475, now seen corresponding path program 2 times [2021-11-23 16:51:26,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:26,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75917654] [2021-11-23 16:51:26,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:26,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:26,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:26,749 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:26,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:51:26,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:26,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:26,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:51:26,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 16:51:27,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 16:51:27,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:27,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75917654] [2021-11-23 16:51:27,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75917654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:27,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [142824319] [2021-11-23 16:51:27,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:27,945 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:27,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:27,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 16:51:28,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:28,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:28,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:51:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 16:51:28,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 16:51:28,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [142824319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101604471] [2021-11-23 16:51:28,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:51:28,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:28,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:28,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:28,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 16:51:28,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:51:28,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:28,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:51:28,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 16:51:28,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-23 16:51:29,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101604471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:29,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:29,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 12, 13] total 41 [2021-11-23 16:51:29,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643307581] [2021-11-23 16:51:29,993 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:29,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-23 16:51:29,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-23 16:51:29,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1222, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 16:51:30,001 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:37,591 INFO L93 Difference]: Finished difference Result 346 states and 440 transitions. [2021-11-23 16:51:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-23 16:51:37,591 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 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 62 [2021-11-23 16:51:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:37,598 INFO L225 Difference]: With dead ends: 346 [2021-11-23 16:51:37,598 INFO L226 Difference]: Without dead ends: 282 [2021-11-23 16:51:37,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2591, Invalid=5065, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 16:51:37,605 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2267 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:37,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2267 Valid, 610 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 16:51:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-23 16:51:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 163. [2021-11-23 16:51:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.1419753086419753) internal successors, (185), 162 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 185 transitions. [2021-11-23 16:51:37,631 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 185 transitions. Word has length 62 [2021-11-23 16:51:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:37,632 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 185 transitions. [2021-11-23 16:51:37,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 185 transitions. [2021-11-23 16:51:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-23 16:51:37,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:37,636 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:37,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:37,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:38,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:38,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:38,253 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:38,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1451441541, now seen corresponding path program 3 times [2021-11-23 16:51:38,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:38,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642629396] [2021-11-23 16:51:38,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:51:38,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:38,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:38,257 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:38,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:51:38,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-23 16:51:38,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:51:38,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-23 16:51:39,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-23 16:51:42,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:42,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642629396] [2021-11-23 16:51:42,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642629396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:42,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [102033881] [2021-11-23 16:51:42,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:51:42,120 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:42,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:42,122 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:42,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 16:51:47,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-23 16:51:47,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:47,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:51:47,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-23 16:51:47,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-23 16:51:48,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [102033881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199014915] [2021-11-23 16:51:48,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:51:48,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:48,493 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:48,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 16:52:14,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-23 16:52:14,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:52:14,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-23 16:52:14,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-23 16:52:15,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199014915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:15,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:15,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26, 27, 26, 27] total 51 [2021-11-23 16:52:15,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906400013] [2021-11-23 16:52:15,678 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:15,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 16:52:15,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 16:52:15,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=1895, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 16:52:15,684 INFO L87 Difference]: Start difference. First operand 163 states and 185 transitions. Second operand has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:31,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:31,055 INFO L93 Difference]: Finished difference Result 416 states and 516 transitions. [2021-11-23 16:52:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-23 16:52:31,056 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 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 162 [2021-11-23 16:52:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:31,058 INFO L225 Difference]: With dead ends: 416 [2021-11-23 16:52:31,058 INFO L226 Difference]: Without dead ends: 278 [2021-11-23 16:52:31,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=2653, Invalid=6467, Unknown=0, NotChecked=0, Total=9120 [2021-11-23 16:52:31,065 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1713 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2883 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 3525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 2883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:31,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 1193 Invalid, 3525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 2883 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 16:52:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-23 16:52:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2021-11-23 16:52:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.1642335766423357) internal successors, (319), 274 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 319 transitions. [2021-11-23 16:52:31,114 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 319 transitions. Word has length 162 [2021-11-23 16:52:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:31,115 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 319 transitions. [2021-11-23 16:52:31,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6470588235294117) internal successors, (186), 51 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 319 transitions. [2021-11-23 16:52:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-23 16:52:31,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:31,131 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:31,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:31,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:31,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:31,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:31,746 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:31,746 INFO L85 PathProgramCache]: Analyzing trace with hash 745962796, now seen corresponding path program 4 times [2021-11-23 16:52:31,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:31,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005384945] [2021-11-23 16:52:31,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:52:31,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:31,749 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:31,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:52:32,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:52:32,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:32,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 16:52:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-23 16:52:33,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-23 16:52:39,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005384945] [2021-11-23 16:52:39,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005384945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1042364574] [2021-11-23 16:52:39,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:52:39,032 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:39,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:39,033 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:39,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 16:52:39,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:52:39,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 16:52:39,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-23 16:52:40,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-23 16:52:40,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1042364574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:40,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105954405] [2021-11-23 16:52:40,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:52:40,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:40,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:40,636 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:40,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 16:52:40,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:52:40,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 16:52:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 4003 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2021-11-23 16:52:41,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2021-11-23 16:52:53,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105954405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:53,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:53,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47, 47, 49, 50] total 142 [2021-11-23 16:52:53,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115520840] [2021-11-23 16:52:53,307 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:53,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2021-11-23 16:52:53,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:53,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-11-23 16:52:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=15460, Unknown=0, NotChecked=0, Total=20022 [2021-11-23 16:52:53,325 INFO L87 Difference]: Start difference. First operand 275 states and 319 transitions. Second operand has 142 states, 142 states have (on average 3.936619718309859) internal successors, (559), 142 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:58,045 INFO L93 Difference]: Finished difference Result 1324 states and 1685 transitions. [2021-11-23 16:56:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2021-11-23 16:56:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.936619718309859) internal successors, (559), 142 states have internal predecessors, (559), 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 274 [2021-11-23 16:56:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:58,054 INFO L225 Difference]: With dead ends: 1324 [2021-11-23 16:56:58,054 INFO L226 Difference]: Without dead ends: 1048 [2021-11-23 16:56:58,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1906 GetRequests, 1586 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20797 ImplicationChecksByTransitivity, 242.0s TimeCoverageRelationStatistics Valid=33725, Invalid=69637, Unknown=0, NotChecked=0, Total=103362 [2021-11-23 16:56:58,077 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 34225 mSDsluCounter, 4512 mSDsCounter, 0 mSdLazyCounter, 11444 mSolverCounterSat, 9267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34225 SdHoareTripleChecker+Valid, 4606 SdHoareTripleChecker+Invalid, 20711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9267 IncrementalHoareTripleChecker+Valid, 11444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:58,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34225 Valid, 4606 Invalid, 20711 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9267 Valid, 11444 Invalid, 0 Unknown, 0 Unchecked, 17.1s Time] [2021-11-23 16:56:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-11-23 16:56:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 641. [2021-11-23 16:56:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 1.140625) internal successors, (730), 640 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 730 transitions. [2021-11-23 16:56:58,128 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 730 transitions. Word has length 274 [2021-11-23 16:56:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:58,129 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 730 transitions. [2021-11-23 16:56:58,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.936619718309859) internal successors, (559), 142 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 730 transitions. [2021-11-23 16:56:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-23 16:56:58,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:58,150 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 91, 91, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:58,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:58,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 16:56:58,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:58,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:58,755 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:56:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1977791352, now seen corresponding path program 5 times [2021-11-23 16:56:58,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:58,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326715364] [2021-11-23 16:56:58,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:56:58,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:58,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:58,761 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:58,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 16:57:46,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 136 check-sat command(s) [2021-11-23 16:57:46,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:57:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-23 16:57:46,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34515 backedges. 0 proven. 18225 refuted. 0 times theorem prover too weak. 16290 trivial. 0 not checked. [2021-11-23 16:57:57,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 34515 backedges. 0 proven. 18225 refuted. 0 times theorem prover too weak. 16290 trivial. 0 not checked. [2021-11-23 16:59:07,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:07,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326715364] [2021-11-23 16:59:07,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326715364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:07,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2062870049] [2021-11-23 16:59:07,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:59:07,594 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:07,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:59:07,603 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:59:07,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5287e715-9c11-4f09-9426-71dfc60fd9c1/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process