./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_4.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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:01:16,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:01:16,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:01:16,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:01:16,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:01:16,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:01:16,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:01:16,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:01:16,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:01:16,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:01:16,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:01:16,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:01:16,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:01:16,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:01:16,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:01:16,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:01:16,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:01:16,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:01:16,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:01:16,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:01:16,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:01:16,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:01:16,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:01:16,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:01:16,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:01:16,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:01:16,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:01:16,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:01:16,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:01:16,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:01:16,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:01:16,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:01:16,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:01:16,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:01:16,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:01:16,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:01:16,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:01:16,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:01:16,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:01:16,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:01:16,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:01:16,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:01:16,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:01:16,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:01:16,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:01:16,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:01:16,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:01:16,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:01:16,411 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:01:16,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:01:16,412 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:01:16,412 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:01:16,412 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:01:16,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:01:16,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:01:16,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:01:16,413 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:01:16,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:01:16,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:01:16,414 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:01:16,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:01:16,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:01:16,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:01:16,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:01:16,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:01:16,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:01:16,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:01:16,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:01:16,417 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:01:16,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:01:16,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:01:16,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:01:16,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:01:16,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:01:16,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:16,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:01:16,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:01:16,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:01:16,442 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:01:16,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:01:16,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:01:16,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:01:16,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:01:16,443 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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 [2021-11-23 17:01:16,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:01:16,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:01:16,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:01:16,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:01:16,782 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:01:16,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-acceleration/array_4.i [2021-11-23 17:01:16,890 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data/987fc0fe5/2c15fefdf5d54477ad2942c792ca2bfc/FLAG1b1590a52 [2021-11-23 17:01:17,452 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:01:17,453 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/sv-benchmarks/c/loop-acceleration/array_4.i [2021-11-23 17:01:17,465 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data/987fc0fe5/2c15fefdf5d54477ad2942c792ca2bfc/FLAG1b1590a52 [2021-11-23 17:01:17,815 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data/987fc0fe5/2c15fefdf5d54477ad2942c792ca2bfc [2021-11-23 17:01:17,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:01:17,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:01:17,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:17,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:01:17,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:01:17,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:17" (1/1) ... [2021-11-23 17:01:17,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ed0aa06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:17, skipping insertion in model container [2021-11-23 17:01:17,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:17" (1/1) ... [2021-11-23 17:01:17,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:01:17,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:01:18,016 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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2021-11-23 17:01:18,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:18,056 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:01:18,073 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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2021-11-23 17:01:18,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:18,100 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:01:18,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18 WrapperNode [2021-11-23 17:01:18,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:18,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:18,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:01:18,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:01:18,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,143 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-11-23 17:01:18,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:18,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:01:18,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:01:18,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:01:18,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:01:18,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:01:18,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:01:18,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:01:18,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:18" (1/1) ... [2021-11-23 17:01:18,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:18,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:18,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:01:18,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:01:18,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:01:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:01:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:01:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:01:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:01:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:01:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:01:18,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:01:18,392 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:01:18,394 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:01:18,577 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:01:18,604 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 17:01:18,622 INFO L158 Benchmark]: Toolchain (without parser) took 798.96ms. Allocated memory is still 96.5MB. Free memory was 56.4MB in the beginning and 61.3MB in the end (delta: -4.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:01:18,623 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 96.5MB. Free memory is still 72.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:01:18,624 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.11ms. Allocated memory is still 96.5MB. Free memory was 56.2MB in the beginning and 73.6MB in the end (delta: -17.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 17:01:18,626 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.31ms. Allocated memory is still 96.5MB. Free memory was 73.6MB in the beginning and 72.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:01:18,627 INFO L158 Benchmark]: Boogie Preprocessor took 38.79ms. Allocated memory is still 96.5MB. Free memory was 72.2MB in the beginning and 70.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:01:18,628 INFO L158 Benchmark]: RCFGBuilder took 436.11ms. Allocated memory is still 96.5MB. Free memory was 70.9MB in the beginning and 61.3MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:01:18,633 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 96.5MB. Free memory is still 72.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.11ms. Allocated memory is still 96.5MB. Free memory was 56.2MB in the beginning and 73.6MB in the end (delta: -17.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.31ms. Allocated memory is still 96.5MB. Free memory was 73.6MB in the beginning and 72.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.79ms. Allocated memory is still 96.5MB. Free memory was 72.2MB in the beginning and 70.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 436.11ms. Allocated memory is still 96.5MB. Free memory was 70.9MB in the beginning and 61.3MB in the end (delta: 9.5MB). 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 17:01:18,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:01:21,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:01:21,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:01:21,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:01:21,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:01:21,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:01:21,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:01:21,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:01:21,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:01:21,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:01:21,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:01:21,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:01:21,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:01:21,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:01:21,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:01:21,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:01:21,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:01:21,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:01:21,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:01:21,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:01:21,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:01:21,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:01:21,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:01:21,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:01:21,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:01:21,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:01:21,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:01:21,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:01:21,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:01:21,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:01:21,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:01:21,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:01:21,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:01:21,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:01:21,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:01:21,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:01:21,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:01:21,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:01:21,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:01:21,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:01:21,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:01:21,671 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:01:21,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:01:21,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:01:21,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:01:21,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:01:21,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:01:21,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:01:21,724 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:01:21,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:01:21,725 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:01:21,725 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:01:21,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:01:21,727 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:01:21,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:01:21,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:01:21,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:01:21,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:01:21,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:01:21,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:01:21,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:01:21,731 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:01:21,731 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:01:21,731 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:01:21,732 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:01:21,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:01:21,732 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:01:21,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:01:21,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:01:21,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:01:21,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:01:21,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:21,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:01:21,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:01:21,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:01:21,735 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:01:21,736 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:21,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:01:21,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:01:21,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:01:21,737 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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 [2021-11-23 17:01:22,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:01:22,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:01:22,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:01:22,210 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:01:22,210 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:01:22,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-acceleration/array_4.i [2021-11-23 17:01:22,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data/9a4f2e999/f44b92031c5a4c328e117a3336b54ca5/FLAGa86403c5c [2021-11-23 17:01:23,004 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:01:23,005 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/sv-benchmarks/c/loop-acceleration/array_4.i [2021-11-23 17:01:23,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data/9a4f2e999/f44b92031c5a4c328e117a3336b54ca5/FLAGa86403c5c [2021-11-23 17:01:23,032 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/data/9a4f2e999/f44b92031c5a4c328e117a3336b54ca5 [2021-11-23 17:01:23,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:01:23,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:01:23,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:23,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:01:23,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:01:23,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b41b64a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23, skipping insertion in model container [2021-11-23 17:01:23,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:01:23,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:01:23,297 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2021-11-23 17:01:23,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:23,323 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:01:23,377 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_5b57b56d-5ca6-4590-9f54-1f078d6a51be/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2021-11-23 17:01:23,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:23,406 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:01:23,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23 WrapperNode [2021-11-23 17:01:23,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:23,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:23,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:01:23,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:01:23,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,450 INFO L137 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2021-11-23 17:01:23,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:23,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:01:23,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:01:23,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:01:23,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:01:23,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:01:23,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:01:23,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:01:23,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (1/1) ... [2021-11-23 17:01:23,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:23,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:23,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:01:23,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:01:23,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:01:23,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:01:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:01:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:01:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:01:23,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:01:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:01:23,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:01:23,708 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:01:23,710 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:01:23,903 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:01:23,908 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:01:23,909 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:01:23,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:01:23 BoogieIcfgContainer [2021-11-23 17:01:23,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:01:23,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:01:23,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:01:23,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:01:23,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:01:23" (1/3) ... [2021-11-23 17:01:23,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e20ec68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:01:23, skipping insertion in model container [2021-11-23 17:01:23,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:23" (2/3) ... [2021-11-23 17:01:23,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e20ec68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:01:23, skipping insertion in model container [2021-11-23 17:01:23,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:01:23" (3/3) ... [2021-11-23 17:01:23,919 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2021-11-23 17:01:23,944 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:01:23,944 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:01:24,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:01:24,018 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 17:01:24,031 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:01:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 17:01:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:01:24,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:24,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:24,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:24,059 INFO L85 PathProgramCache]: Analyzing trace with hash 212257263, now seen corresponding path program 1 times [2021-11-23 17:01:24,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:24,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084303236] [2021-11-23 17:01:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:24,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:24,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:24,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:24,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:01:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:01:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:24,227 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 17:01:24,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:24,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:24,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084303236] [2021-11-23 17:01:24,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084303236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:24,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:24,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:01:24,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363420831] [2021-11-23 17:01:24,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:24,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:01:24,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:01:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:01:24,269 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 17:01:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:24,284 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-23 17:01:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:01:24,287 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 17:01:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:24,296 INFO L225 Difference]: With dead ends: 28 [2021-11-23 17:01:24,296 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 17:01:24,299 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 17:01:24,304 INFO L933 BasicCegarLoop]: 17 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, 17 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 17:01:24,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 17:01:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 17:01:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 17:01:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-23 17:01:24,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-23 17:01:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:24,343 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-23 17:01:24,343 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 17:01:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-23 17:01:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:01:24,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:24,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:24,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:24,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:24,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2018512365, now seen corresponding path program 1 times [2021-11-23 17:01:24,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:24,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652753410] [2021-11-23 17:01:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:24,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:24,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:24,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:24,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:01:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:24,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:24,668 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 17:01:24,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:24,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:24,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652753410] [2021-11-23 17:01:24,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652753410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:24,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:24,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:24,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085936032] [2021-11-23 17:01:24,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:24,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:24,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:24,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:24,674 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 17:01:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:24,705 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-23 17:01:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-23 17:01:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:24,707 INFO L225 Difference]: With dead ends: 29 [2021-11-23 17:01:24,708 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 17:01:24,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 17:01:24,710 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:24,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 17:01:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2021-11-23 17:01:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-23 17:01:24,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-23 17:01:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:24,718 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-23 17:01:24,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 17:01:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-23 17:01:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:01:24,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:24,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:24,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:24,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:24,931 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:24,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1562582865, now seen corresponding path program 1 times [2021-11-23 17:01:24,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:24,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714401032] [2021-11-23 17:01:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:24,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:24,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:24,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:24,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:01:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:24,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:25,020 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 17:01:25,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:25,073 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 17:01:25,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:25,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714401032] [2021-11-23 17:01:25,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714401032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:25,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [200067918] [2021-11-23 17:01:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:25,075 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:25,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:01:25,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:01:25,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:01:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:25,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:25,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:25,217 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 17:01:25,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:25,267 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 17:01:25,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [200067918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:25,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206917120] [2021-11-23 17:01:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:25,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:25,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:25,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:01:25,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:01:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:25,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:25,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:25,396 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 17:01:25,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:25,433 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 17:01:25,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206917120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:25,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:01:25,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 17:01:25,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658692577] [2021-11-23 17:01:25,435 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:01:25,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:01:25,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:01:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:01:25,437 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 17:01:25,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:25,582 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-11-23 17:01:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:01:25,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) Word has length 11 [2021-11-23 17:01:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:25,588 INFO L225 Difference]: With dead ends: 55 [2021-11-23 17:01:25,588 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 17:01:25,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 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 17:01:25,593 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:25,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 30 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:01:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 17:01:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 19. [2021-11-23 17:01:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 17:01:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-23 17:01:25,613 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2021-11-23 17:01:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:25,614 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-23 17:01:25,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 17:01:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-23 17:01:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 17:01:25,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:25,617 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:25,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:25,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:01:26,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 17:01:26,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:26,219 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash -10610165, now seen corresponding path program 2 times [2021-11-23 17:01:26,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662213682] [2021-11-23 17:01:26,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:01:26,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:26,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:26,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:26,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:01:26,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 17:01:26,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:01:26,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:26,368 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 17:01:26,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:26,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662213682] [2021-11-23 17:01:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662213682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:26,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:26,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:01:26,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339528308] [2021-11-23 17:01:26,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:26,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:01:26,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:26,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:01:26,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:01:26,377 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:26,408 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-11-23 17:01:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:01:26,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 17:01:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:26,410 INFO L225 Difference]: With dead ends: 26 [2021-11-23 17:01:26,410 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 17:01:26,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 17:01:26,412 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:26,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:26,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 17:01:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-23 17:01:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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 17:01:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-23 17:01:26,418 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2021-11-23 17:01:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:26,418 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-23 17:01:26,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-23 17:01:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:01:26,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:26,420 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:26,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:26,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:26,630 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:26,630 INFO L85 PathProgramCache]: Analyzing trace with hash -907607845, now seen corresponding path program 1 times [2021-11-23 17:01:26,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:26,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418306271] [2021-11-23 17:01:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:26,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:26,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:26,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:01:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:26,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:01:26,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:01:26,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:01:26,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418306271] [2021-11-23 17:01:26,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418306271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1048272227] [2021-11-23 17:01:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:26,888 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:01:26,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:01:26,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:01:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:26,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:01:26,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:01:27,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:01:27,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1048272227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:27,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849067388] [2021-11-23 17:01:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:27,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:27,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:27,088 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:01:27,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 17:01:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:27,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:01:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:01:27,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:01:27,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849067388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:27,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:01:27,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 16 [2021-11-23 17:01:27,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385437820] [2021-11-23 17:01:27,319 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:01:27,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:01:27,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:01:27,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:01:27,321 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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 17:01:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:28,095 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-11-23 17:01:28,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 17:01:28,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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 20 [2021-11-23 17:01:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:28,097 INFO L225 Difference]: With dead ends: 99 [2021-11-23 17:01:28,097 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 17:01:28,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:01:28,100 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:28,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 95 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:01:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 17:01:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-11-23 17:01:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 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 17:01:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-23 17:01:28,125 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 20 [2021-11-23 17:01:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:28,125 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-23 17:01:28,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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 17:01:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-23 17:01:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 17:01:28,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:28,132 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:28,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:28,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-23 17:01:28,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 17:01:28,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:28,738 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1231339777, now seen corresponding path program 2 times [2021-11-23 17:01:28,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:28,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265247599] [2021-11-23 17:01:28,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:01:28,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:28,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:28,742 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:28,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:01:28,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:01:28,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:28,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:01:28,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 17:01:29,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 17:01:29,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:29,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265247599] [2021-11-23 17:01:29,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265247599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:29,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1256916152] [2021-11-23 17:01:29,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:01:29,635 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:29,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:01:29,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:01:29,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:01:29,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:01:29,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:29,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:01:29,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 17:01:29,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 17:01:30,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1256916152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:30,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662472880] [2021-11-23 17:01:30,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:01:30,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:30,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:30,097 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:01:30,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 17:01:30,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:01:30,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:30,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:01:30,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 17:01:30,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 17:01:30,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662472880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:30,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:01:30,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2021-11-23 17:01:30,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824901996] [2021-11-23 17:01:30,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:01:30,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 17:01:30,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 17:01:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:01:30,521 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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 17:01:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:32,150 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2021-11-23 17:01:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:01:32,151 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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 65 [2021-11-23 17:01:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:32,153 INFO L225 Difference]: With dead ends: 204 [2021-11-23 17:01:32,153 INFO L226 Difference]: Without dead ends: 161 [2021-11-23 17:01:32,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:01:32,155 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 450 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:32,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 213 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 17:01:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-23 17:01:32,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 90. [2021-11-23 17:01:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 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 17:01:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-11-23 17:01:32,169 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 65 [2021-11-23 17:01:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:32,170 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-11-23 17:01:32,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 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 17:01:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-11-23 17:01:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 17:01:32,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:32,172 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:32,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:32,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:32,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 17:01:32,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:32,780 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:32,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:32,781 INFO L85 PathProgramCache]: Analyzing trace with hash -487950617, now seen corresponding path program 3 times [2021-11-23 17:01:32,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:32,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109408097] [2021-11-23 17:01:32,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:01:32,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:32,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:32,782 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:32,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:01:33,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-23 17:01:33,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:01:33,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:01:33,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:01:34,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:34,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109408097] [2021-11-23 17:01:34,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109408097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:34,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1786024677] [2021-11-23 17:01:34,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:01:34,105 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:34,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:01:34,106 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:01:34,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:01:35,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-23 17:01:35,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:35,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:01:35,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:01:35,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:01:35,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1786024677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669143548] [2021-11-23 17:01:35,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:01:35,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:35,429 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:01:35,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:01:36,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-23 17:01:36,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:01:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:01:36,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-23 17:01:36,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669143548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:36,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:01:36,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 30 [2021-11-23 17:01:36,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921926452] [2021-11-23 17:01:36,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:01:36,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:01:36,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:36,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:01:36,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:01:36,860 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 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 17:01:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:40,773 INFO L93 Difference]: Finished difference Result 208 states and 225 transitions. [2021-11-23 17:01:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 17:01:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-23 17:01:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:40,775 INFO L225 Difference]: With dead ends: 208 [2021-11-23 17:01:40,775 INFO L226 Difference]: Without dead ends: 137 [2021-11-23 17:01:40,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=905, Invalid=2175, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 17:01:40,778 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 373 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:40,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 280 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 17:01:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-23 17:01:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-11-23 17:01:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 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 17:01:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-11-23 17:01:40,793 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 89 [2021-11-23 17:01:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:40,794 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-11-23 17:01:40,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 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 17:01:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-11-23 17:01:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 17:01:40,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:40,798 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:40,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 17:01:41,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:41,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-23 17:01:41,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:41,411 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:41,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:41,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1361638883, now seen corresponding path program 4 times [2021-11-23 17:01:41,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:41,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002101992] [2021-11-23 17:01:41,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:01:41,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:41,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:41,413 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:41,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:01:41,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:01:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:41,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 17:01:41,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:01:42,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:01:44,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:44,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002101992] [2021-11-23 17:01:44,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002101992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:44,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [750753241] [2021-11-23 17:01:44,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:01:44,418 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:44,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:01:44,420 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:01:44,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:01:44,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:01:44,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:44,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 17:01:44,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:01:45,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:01:45,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [750753241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370275076] [2021-11-23 17:01:45,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:01:45,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:45,428 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:01:45,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:01:45,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:01:45,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:01:45,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 17:01:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:01:45,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:01:46,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370275076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:01:46,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:01:46,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 27, 27] total 52 [2021-11-23 17:01:46,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329949787] [2021-11-23 17:01:46,256 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:01:46,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 17:01:46,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:46,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 17:01:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=1926, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 17:01:46,261 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 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 17:01:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:57,446 INFO L93 Difference]: Finished difference Result 442 states and 469 transitions. [2021-11-23 17:01:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 17:01:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 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 135 [2021-11-23 17:01:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:57,450 INFO L225 Difference]: With dead ends: 442 [2021-11-23 17:01:57,450 INFO L226 Difference]: Without dead ends: 357 [2021-11-23 17:01:57,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 754 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1974, Invalid=3726, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 17:01:57,455 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2582 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:57,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2582 Valid, 799 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [716 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 17:01:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-23 17:01:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 188. [2021-11-23 17:01:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 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 17:01:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2021-11-23 17:01:57,482 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 135 [2021-11-23 17:01:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:57,482 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2021-11-23 17:01:57,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 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 17:01:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2021-11-23 17:01:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-23 17:01:57,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:57,488 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:57,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:57,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:57,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-23 17:01:58,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:01:58,092 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash 345701295, now seen corresponding path program 5 times [2021-11-23 17:01:58,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:58,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869321672] [2021-11-23 17:01:58,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:01:58,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:58,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:58,094 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:58,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:02:00,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2021-11-23 17:02:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:02:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 17:02:00,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:02:02,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:02:11,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:11,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869321672] [2021-11-23 17:02:11,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869321672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:11,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [277987802] [2021-11-23 17:02:11,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:02:11,980 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:11,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:02:11,981 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:02:11,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:02:48,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2021-11-23 17:02:48,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:02:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 17:02:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:02:49,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3527 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-23 17:03:01,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [277987802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:01,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543924087] [2021-11-23 17:03:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:03:01,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:01,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:01,200 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:01,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b57b56d-5ca6-4590-9f54-1f078d6a51be/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process