./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8 --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 918183af41ed822b080517d21adc4e88771d95d1ab967de55d618cd7a5912a2d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:41,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:41,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:41,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:41,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:41,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:41,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:41,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:41,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:41,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:41,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:41,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:41,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:41,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:41,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:41,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:41,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:41,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:41,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:41,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:41,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:41,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:41,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:41,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:41,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:41,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:41,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:41,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:41,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:41,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:41,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:41,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:41,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:41,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:41,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:41,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:41,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:41,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:41,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:41,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:41,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:41,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:44:41,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:41,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:41,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:41,502 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:41,503 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:41,503 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:41,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:44:41,504 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:41,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:41,513 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:44:41,513 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:44:41,513 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:41,514 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:44:41,514 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:44:41,514 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:44:41,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:41,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:41,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:44:41,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:41,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:41,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:41,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:41,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:41,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:41,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:41,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:41,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:41,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:41,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:41,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:41,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:41,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:41,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:41,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:41,525 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:44:41,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:44:41,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:41,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:41,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:41,527 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_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 918183af41ed822b080517d21adc4e88771d95d1ab967de55d618cd7a5912a2d [2021-11-07 01:44:41,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:41,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:41,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:41,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:41,990 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:41,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i [2021-11-07 01:44:42,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data/706b53f5b/14612dd478f94388aed968ce0faea551/FLAG9a8f22581 [2021-11-07 01:44:42,582 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:42,583 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i [2021-11-07 01:44:42,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data/706b53f5b/14612dd478f94388aed968ce0faea551/FLAG9a8f22581 [2021-11-07 01:44:42,925 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data/706b53f5b/14612dd478f94388aed968ce0faea551 [2021-11-07 01:44:42,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:42,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:42,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:42,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:42,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:42,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:42" (1/1) ... [2021-11-07 01:44:42,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b334973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:42, skipping insertion in model container [2021-11-07 01:44:42,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:42" (1/1) ... [2021-11-07 01:44:42,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:42,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:43,167 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i[950,963] [2021-11-07 01:44:43,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:43,192 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:43,206 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i[950,963] [2021-11-07 01:44:43,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:43,227 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:43,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43 WrapperNode [2021-11-07 01:44:43,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:43,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:43,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:43,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:43,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:43,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:43,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:43,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:43,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:43,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:43,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:43,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:43,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (1/1) ... [2021-11-07 01:44:43,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:43,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:43,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:43,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:43,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:44:43,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:43,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:43,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:46,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:46,074 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-07 01:44:46,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:46 BoogieIcfgContainer [2021-11-07 01:44:46,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:46,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:46,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:46,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:42" (1/3) ... [2021-11-07 01:44:46,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3793d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:46, skipping insertion in model container [2021-11-07 01:44:46,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:43" (2/3) ... [2021-11-07 01:44:46,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3793d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:46, skipping insertion in model container [2021-11-07 01:44:46,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:46" (3/3) ... [2021-11-07 01:44:46,088 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound100.i [2021-11-07 01:44:46,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:46,094 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:44:46,150 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:46,158 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 [2021-11-07 01:44:46,159 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:44:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 states have internal predecessors, (19), 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) [2021-11-07 01:44:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:44:46,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:46,181 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:44:46,182 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:46,197 INFO L85 PathProgramCache]: Analyzing trace with hash 136140001, now seen corresponding path program 1 times [2021-11-07 01:44:46,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:46,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945341189] [2021-11-07 01:44:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:46,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:46,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:46,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945341189] [2021-11-07 01:44:46,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945341189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:46,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:46,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:44:46,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784723077] [2021-11-07 01:44:46,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:44:46,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:46,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:44:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:46,417 INFO L87 Difference]: Start difference. First operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 states have internal predecessors, (19), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-07 01:44:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:46,432 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-11-07 01:44:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:44:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-07 01:44:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:46,442 INFO L225 Difference]: With dead ends: 25 [2021-11-07 01:44:46,442 INFO L226 Difference]: Without dead ends: 12 [2021-11-07 01:44:46,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-07 01:44:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-07 01:44:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) 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) [2021-11-07 01:44:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-07 01:44:46,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2021-11-07 01:44:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:46,478 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-07 01:44:46,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-07 01:44:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-07 01:44:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:44:46,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:46,480 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:44:46,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:44:46,480 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash -135046298, now seen corresponding path program 1 times [2021-11-07 01:44:46,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:46,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950843562] [2021-11-07 01:44:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:46,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:46,505 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:46,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684135765] [2021-11-07 01:44:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:46,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:46,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:46,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:46,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:44:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:44:46,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:47,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:47,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:44:47,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950843562] [2021-11-07 01:44:47,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:44:47,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684135765] [2021-11-07 01:44:47,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684135765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:47,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:47,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:47,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150257964] [2021-11-07 01:44:47,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:44:47,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:44:47,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:44:47,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:44:47,322 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:48,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:48,540 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-07 01:44:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:44:48,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:44:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:48,542 INFO L225 Difference]: With dead ends: 32 [2021-11-07 01:44:48,543 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 01:44:48,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:44:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 01:44:48,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-07 01:44:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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) [2021-11-07 01:44:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-07 01:44:48,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2021-11-07 01:44:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:48,558 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-07 01:44:48,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-07 01:44:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:44:48,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:48,562 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2021-11-07 01:44:48,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:48,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:48,780 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:48,781 INFO L85 PathProgramCache]: Analyzing trace with hash 919733532, now seen corresponding path program 1 times [2021-11-07 01:44:48,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:44:48,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638814935] [2021-11-07 01:44:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:48,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:44:48,804 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:44:48,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256379501] [2021-11-07 01:44:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:48,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:48,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:48,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:48,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:44:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:44:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:01,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:01,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:45:01,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638814935] [2021-11-07 01:45:01,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:45:01,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256379501] [2021-11-07 01:45:01,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~b~0] [2021-11-07 01:45:01,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1929027734] [2021-11-07 01:45:01,208 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-07 01:45:01,209 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:45:01,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:45:01,225 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:45:01,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:45:01,269 INFO L180 QuantifierPusher]: treesize reduction 5, result has 96.4 percent of original size [2021-11-07 01:45:01,272 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:45:01,273 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:45:01,279 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:45:01,280 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:45:01,284 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 135 [2021-11-07 01:45:01,315 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_32|], 10=[|v_#valid_33|]} [2021-11-07 01:45:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:01,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:45:01,354 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,355 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:45:01,356 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:45:01,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:45:01,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 01:45:01,366 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:45:01,367 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-07 01:45:01,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:45:01,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:01,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:01,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:45:01,469 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:45:01,474 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,474 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:45:01,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-07 01:45:01,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-07 01:45:01,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:45:01,499 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:242, output treesize:105 [2021-11-07 01:45:01,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-07 01:45:01,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,705 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:45:01,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 293 [2021-11-07 01:45:01,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,862 INFO L180 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size [2021-11-07 01:45:01,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:45:01,889 INFO L180 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size [2021-11-07 01:45:01,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:45:01,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:45:01,953 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:45:07,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:45:07,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:07,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 01:45:07,653 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-07 01:45:07,653 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 01:45:07,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:45:07,659 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:45:07,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:07,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:07,863 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-07 01:45:07,866 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:45:07,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:45:07 BoogieIcfgContainer [2021-11-07 01:45:07,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:45:07,880 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:45:07,880 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:45:07,881 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:45:07,881 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:46" (3/4) ... [2021-11-07 01:45:07,885 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:45:07,885 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:45:07,886 INFO L168 Benchmark]: Toolchain (without parser) took 24955.67 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 64.4 MB in the beginning and 63.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:07,886 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 81.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:45:07,887 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.50 ms. Allocated memory is still 107.0 MB. Free memory was 64.2 MB in the beginning and 80.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:07,888 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.43 ms. Allocated memory is still 107.0 MB. Free memory was 80.6 MB in the beginning and 79.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:45:07,888 INFO L168 Benchmark]: Boogie Preprocessor took 25.79 ms. Allocated memory is still 107.0 MB. Free memory was 79.1 MB in the beginning and 78.2 MB in the end (delta: 916.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:07,889 INFO L168 Benchmark]: RCFGBuilder took 2780.90 ms. Allocated memory is still 107.0 MB. Free memory was 78.2 MB in the beginning and 61.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:07,889 INFO L168 Benchmark]: TraceAbstraction took 21800.32 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 61.0 MB in the beginning and 63.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 21.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:07,890 INFO L168 Benchmark]: Witness Printer took 4.59 ms. Allocated memory is still 130.0 MB. Free memory is still 63.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:45:07,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 81.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.50 ms. Allocated memory is still 107.0 MB. Free memory was 64.2 MB in the beginning and 80.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.43 ms. Allocated memory is still 107.0 MB. Free memory was 80.6 MB in the beginning and 79.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.79 ms. Allocated memory is still 107.0 MB. Free memory was 79.1 MB in the beginning and 78.2 MB in the end (delta: 916.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2780.90 ms. Allocated memory is still 107.0 MB. Free memory was 78.2 MB in the beginning and 61.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21800.32 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 61.0 MB in the beginning and 63.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 21.8 MB. Max. memory is 16.1 GB. * Witness Printer took 4.59 ms. Allocated memory is still 130.0 MB. Free memory is still 63.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L16] COND TRUE !cond [L30] B = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L16] COND TRUE !cond [L34] q = 0 [L35] r = A [L36] b = B [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND TRUE !(r >= b) [L41] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 21.7s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 18 SDslu, 18 SDs, 0 SdLazy, 40 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 12.9s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 353 SizeOfPredicates, 14 NumberOfNonLiveVariables, 104 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 01:45:07,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/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_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8 --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 918183af41ed822b080517d21adc4e88771d95d1ab967de55d618cd7a5912a2d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:45:10,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:45:10,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:45:10,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:45:10,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:45:10,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:45:10,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:45:10,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:45:10,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:45:10,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:45:10,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:45:10,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:45:10,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:45:10,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:45:10,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:45:10,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:45:10,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:45:10,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:45:10,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:45:10,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:45:10,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:45:10,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:45:10,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:45:10,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:45:10,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:45:10,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:45:10,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:45:10,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:45:10,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:45:10,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:45:10,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:45:10,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:45:10,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:45:10,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:45:10,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:45:10,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:45:10,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:45:10,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:45:10,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:45:10,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:45:10,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:45:10,828 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:45:10,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:45:10,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:45:10,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:45:10,870 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:45:10,871 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:45:10,871 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:45:10,871 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:45:10,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:45:10,871 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:45:10,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:45:10,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:45:10,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:45:10,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:45:10,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:45:10,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:45:10,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:45:10,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:45:10,875 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:45:10,875 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:45:10,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:45:10,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:45:10,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:45:10,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:45:10,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:45:10,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:45:10,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:45:10,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:10,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:45:10,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:45:10,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:45:10,878 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:45:10,878 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:10,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:45:10,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:45:10,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:45:10,879 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_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 918183af41ed822b080517d21adc4e88771d95d1ab967de55d618cd7a5912a2d [2021-11-07 01:45:11,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:45:11,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:45:11,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:45:11,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:45:11,288 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:45:11,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i [2021-11-07 01:45:11,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data/df0c24bd2/f9adf39bf12b48a7960a398798c746d5/FLAG403a97cb2 [2021-11-07 01:45:12,007 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:45:12,007 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i [2021-11-07 01:45:12,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data/df0c24bd2/f9adf39bf12b48a7960a398798c746d5/FLAG403a97cb2 [2021-11-07 01:45:12,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/data/df0c24bd2/f9adf39bf12b48a7960a398798c746d5 [2021-11-07 01:45:12,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:45:12,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:45:12,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:12,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:45:12,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:45:12,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27165d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12, skipping insertion in model container [2021-11-07 01:45:12,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:45:12,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:12,243 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i[950,963] [2021-11-07 01:45:12,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:12,272 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:45:12,325 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound100.i[950,963] [2021-11-07 01:45:12,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:12,371 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:45:12,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12 WrapperNode [2021-11-07 01:45:12,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:12,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:12,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:45:12,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:45:12,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:12,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:45:12,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:45:12,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:45:12,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:45:12,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:45:12,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:45:12,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:45:12,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:12,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:45:12,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:45:12,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:45:12,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:45:12,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:45:12,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:45:12,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:45:12,846 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-07 01:45:12,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:12 BoogieIcfgContainer [2021-11-07 01:45:12,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:45:12,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:45:12,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:45:12,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:45:12,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:45:12" (1/3) ... [2021-11-07 01:45:12,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4380e29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:12, skipping insertion in model container [2021-11-07 01:45:12,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12" (2/3) ... [2021-11-07 01:45:12,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4380e29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:12, skipping insertion in model container [2021-11-07 01:45:12,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:12" (3/3) ... [2021-11-07 01:45:12,856 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound100.i [2021-11-07 01:45:12,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:45:12,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:45:12,909 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:45:12,915 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 [2021-11-07 01:45:12,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:45:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:45:12,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:12,936 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:12,937 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:12,942 INFO L85 PathProgramCache]: Analyzing trace with hash -174569337, now seen corresponding path program 1 times [2021-11-07 01:45:12,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:12,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949930428] [2021-11-07 01:45:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:12,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:12,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:12,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:12,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:45:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:45:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:13,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:13,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:13,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949930428] [2021-11-07 01:45:13,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949930428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:13,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:13,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:45:13,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132846439] [2021-11-07 01:45:13,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:45:13,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:13,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:45:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:45:13,249 INFO L87 Difference]: Start difference. First operand has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2021-11-07 01:45:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:13,268 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2021-11-07 01:45:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:45:13,269 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:45:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:13,278 INFO L225 Difference]: With dead ends: 49 [2021-11-07 01:45:13,278 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 01:45:13,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:45:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 01:45:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-07 01:45:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-11-07 01:45:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-07 01:45:13,320 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2021-11-07 01:45:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:13,320 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-07 01:45:13,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2021-11-07 01:45:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-07 01:45:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:45:13,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:13,322 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:13,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:45:13,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:13,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:13,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1454099019, now seen corresponding path program 1 times [2021-11-07 01:45:13,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:13,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349070472] [2021-11-07 01:45:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:13,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:13,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:13,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:13,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:45:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:13,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:45:13,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:14,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:14,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:14,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349070472] [2021-11-07 01:45:14,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349070472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:14,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:14,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 4] imperfect sequences [] total 10 [2021-11-07 01:45:14,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232571925] [2021-11-07 01:45:14,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:45:14,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:45:14,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:45:14,589 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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) [2021-11-07 01:45:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:16,178 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-11-07 01:45:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:45:16,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 15 [2021-11-07 01:45:16,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:16,181 INFO L225 Difference]: With dead ends: 46 [2021-11-07 01:45:16,181 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 01:45:16,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:45:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 01:45:16,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-11-07 01:45:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-07 01:45:16,194 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 15 [2021-11-07 01:45:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:16,195 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-07 01:45:16,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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) [2021-11-07 01:45:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-07 01:45:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:45:16,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:16,197 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:16,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:45:16,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:16,411 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:16,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1807844991, now seen corresponding path program 1 times [2021-11-07 01:45:16,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:16,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663429489] [2021-11-07 01:45:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:16,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:16,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:16,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:16,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:45:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:45:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:16,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:45:17,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:17,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663429489] [2021-11-07 01:45:17,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663429489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:17,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:17,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-11-07 01:45:17,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070692528] [2021-11-07 01:45:17,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:45:17,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:17,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:45:17,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:45:17,531 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-11-07 01:45:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:17,998 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-07 01:45:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:45:17,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 19 [2021-11-07 01:45:18,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:18,001 INFO L225 Difference]: With dead ends: 49 [2021-11-07 01:45:18,001 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 01:45:18,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 01:45:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-11-07 01:45:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 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) [2021-11-07 01:45:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-07 01:45:18,008 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 19 [2021-11-07 01:45:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:18,008 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-07 01:45:18,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-11-07 01:45:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-07 01:45:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:45:18,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:18,010 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:18,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:18,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:18,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash 567763771, now seen corresponding path program 1 times [2021-11-07 01:45:18,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:18,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134008425] [2021-11-07 01:45:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:18,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:18,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:18,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:45:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:18,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:45:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:19,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:22,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:22,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134008425] [2021-11-07 01:45:22,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134008425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:22,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [52848312] [2021-11-07 01:45:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:22,146 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:22,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:22,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:22,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:45:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:22,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:45:22,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:25,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:26,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [52848312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:26,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502759618] [2021-11-07 01:45:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:26,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:26,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:45:26,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:45:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:27,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:45:27,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:28,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:32,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502759618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:32,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:45:32,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7, 6, 14, 9] total 33 [2021-11-07 01:45:32,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813243739] [2021-11-07 01:45:32,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 01:45:32,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 01:45:32,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=789, Unknown=1, NotChecked=0, Total=1056 [2021-11-07 01:45:32,280 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 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) [2021-11-07 01:45:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:45,869 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2021-11-07 01:45:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:45:45,870 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 01:45:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:45,872 INFO L225 Difference]: With dead ends: 84 [2021-11-07 01:45:45,872 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 01:45:45,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=697, Invalid=2382, Unknown=1, NotChecked=0, Total=3080 [2021-11-07 01:45:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 01:45:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2021-11-07 01:45:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 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) [2021-11-07 01:45:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-07 01:45:45,884 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 21 [2021-11-07 01:45:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:45,885 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-07 01:45:45,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 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) [2021-11-07 01:45:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-07 01:45:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:45:45,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:45,887 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:45,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:46,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-07 01:45:46,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:46,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:46,489 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash -572169874, now seen corresponding path program 1 times [2021-11-07 01:45:46,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:46,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081039271] [2021-11-07 01:45:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:46,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:46,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:46,492 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:46,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:45:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:46,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:45:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:46,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:47,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:47,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081039271] [2021-11-07 01:45:47,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081039271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:47,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1840641706] [2021-11-07 01:45:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:47,189 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:47,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:47,191 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:47,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:45:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:45:47,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:47,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:48,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1840641706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:48,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456816694] [2021-11-07 01:45:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:48,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:45:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:48,251 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:45:48,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 01:45:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:48,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:48,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:48,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456816694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:48,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:45:48,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7, 6, 7, 7] total 18 [2021-11-07 01:45:48,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841744320] [2021-11-07 01:45:48,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:45:48,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:48,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:45:48,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:45:48,982 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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) [2021-11-07 01:45:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:49,491 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-07 01:45:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:45:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 25 [2021-11-07 01:45:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:49,495 INFO L225 Difference]: With dead ends: 59 [2021-11-07 01:45:49,495 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 01:45:49,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:45:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 01:45:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-11-07 01:45:49,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-07 01:45:49,503 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2021-11-07 01:45:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:49,504 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-07 01:45:49,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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) [2021-11-07 01:45:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-07 01:45:49,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:45:49,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:49,506 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:49,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:49,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:49,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:45:50,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:50,125 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2122892309, now seen corresponding path program 2 times [2021-11-07 01:45:50,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:50,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989130189] [2021-11-07 01:45:50,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:45:50,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:50,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:50,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:45:50,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:45:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:45:50,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 01:45:50,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:53,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:07,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:07,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989130189] [2021-11-07 01:46:07,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989130189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:07,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [835677468] [2021-11-07 01:46:07,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:46:07,516 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:07,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:07,518 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:07,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:46:08,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:08,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:08,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 01:46:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:10,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:15,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [835677468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:15,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694433031] [2021-11-07 01:46:15,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:46:15,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:15,847 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:15,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 01:46:16,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:16,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:16,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 01:46:16,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:20,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:53,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694433031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:53,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:46:53,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 16, 12, 20, 14] total 49 [2021-11-07 01:46:53,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741962691] [2021-11-07 01:46:53,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 01:46:53,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 01:46:53,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=1865, Unknown=7, NotChecked=0, Total=2352 [2021-11-07 01:46:53,638 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 49 states, 49 states have (on average 1.816326530612245) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:10,175 WARN L207 SmtUtils]: Spent 36.79 s on a formula simplification. DAG size of input: 85 DAG size of output: 46 [2021-11-07 01:48:47,851 WARN L207 SmtUtils]: Spent 33.40 s on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-11-07 01:50:10,027 WARN L207 SmtUtils]: Spent 1.35 m on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-11-07 01:50:50,391 WARN L207 SmtUtils]: Spent 39.11 s on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2021-11-07 01:51:33,404 WARN L207 SmtUtils]: Spent 39.12 s on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-11-07 01:52:07,428 WARN L207 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2021-11-07 01:52:30,934 WARN L207 SmtUtils]: Spent 6.95 s on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2021-11-07 01:52:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:30,938 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2021-11-07 01:52:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 01:52:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.816326530612245) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:52:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:30,940 INFO L225 Difference]: With dead ends: 83 [2021-11-07 01:52:30,940 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 01:52:30,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 357.2s TimeCoverageRelationStatistics Valid=1548, Invalid=5754, Unknown=8, NotChecked=0, Total=7310 [2021-11-07 01:52:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 01:52:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2021-11-07 01:52:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.163265306122449) internal successors, (57), 50 states have internal predecessors, (57), 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) [2021-11-07 01:52:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-07 01:52:30,956 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 27 [2021-11-07 01:52:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:30,956 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-07 01:52:30,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.816326530612245) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-07 01:52:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:52:30,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:30,959 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:31,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:31,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:31,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:31,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:31,581 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:52:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1133077022, now seen corresponding path program 2 times [2021-11-07 01:52:31,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:31,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155188353] [2021-11-07 01:52:31,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:52:31,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:31,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:31,583 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:31,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:52:32,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:52:32,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:32,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:52:32,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:32,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:34,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:34,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155188353] [2021-11-07 01:52:34,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155188353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:34,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1435575538] [2021-11-07 01:52:34,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:52:34,228 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:34,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:52:34,229 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:52:34,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:52:34,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:52:34,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:52:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:35,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:37,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1435575538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:37,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399527991] [2021-11-07 01:52:37,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:52:37,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:52:37,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:52:37,751 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:52:37,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 01:52:38,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:52:38,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:38,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:52:38,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:38,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:39,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399527991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:39,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:52:39,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 9, 13, 12] total 30 [2021-11-07 01:52:39,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384472102] [2021-11-07 01:52:39,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 01:52:39,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 01:52:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:52:39,685 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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) [2021-11-07 01:52:41,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:41,132 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-11-07 01:52:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:52:41,136 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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 31 [2021-11-07 01:52:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:41,138 INFO L225 Difference]: With dead ends: 79 [2021-11-07 01:52:41,138 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 01:52:41,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=380, Invalid=1342, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:52:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 01:52:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2021-11-07 01:52:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 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) [2021-11-07 01:52:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-07 01:52:41,147 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2021-11-07 01:52:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:41,147 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-07 01:52:41,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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) [2021-11-07 01:52:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-07 01:52:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:52:41,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:41,150 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:41,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:41,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:41,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:52:41,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:41,769 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:52:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:41,770 INFO L85 PathProgramCache]: Analyzing trace with hash 30188635, now seen corresponding path program 3 times [2021-11-07 01:52:41,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:41,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570479327] [2021-11-07 01:52:41,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:52:41,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:41,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:41,771 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:41,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:52:42,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 01:52:42,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 01:52:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 18 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:49,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:24,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:24,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570479327] [2021-11-07 01:53:24,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570479327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:24,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [918862409] [2021-11-07 01:53:24,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:53:24,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:24,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:53:24,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:53:24,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:53:25,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 01:53:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:53:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 01:53:25,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 18 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:27,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:17,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [918862409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:17,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326860985] [2021-11-07 01:54:17,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:54:17,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:54:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:54:17,844 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:54:17,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08be159-1a9f-4024-b890-9740c17c0e80/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 01:54:18,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 01:54:18,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:54:18,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 01:54:18,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:31,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:30,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326860985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:30,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:56:30,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18, 17, 23, 17] total 66 [2021-11-07 01:56:30,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691988751] [2021-11-07 01:56:30,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 01:56:30,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:30,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 01:56:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=3475, Unknown=29, NotChecked=0, Total=4290 [2021-11-07 01:56:30,849 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 66 states, 66 states have (on average 1.803030303030303) internal successors, (119), 66 states have internal predecessors, (119), 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) [2021-11-07 01:57:25,810 WARN L207 SmtUtils]: Spent 9.93 s on a formula simplification. DAG size of input: 178 DAG size of output: 108