./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF --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 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:35:29,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:35:29,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:35:29,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:35:29,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:35:29,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:35:29,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:35:29,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:35:29,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:35:29,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:35:29,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:35:29,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:35:29,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:35:29,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:35:29,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:35:29,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:35:29,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:35:29,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:35:29,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:35:29,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:35:29,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:35:29,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:35:29,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:35:29,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:35:29,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:35:29,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:35:29,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:35:29,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:35:29,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:35:29,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:35:29,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:35:29,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:35:29,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:35:29,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:35:29,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:35:29,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:35:29,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:35:29,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:35:29,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:35:29,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:35:29,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:35:29,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:35:29,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:35:29,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:35:29,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:35:29,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:35:29,658 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:35:29,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:35:29,667 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:35:29,667 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:35:29,667 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:35:29,668 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:35:29,669 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:35:29,669 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:35:29,670 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:35:29,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:35:29,670 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:35:29,671 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:35:29,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:35:29,672 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:35:29,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:35:29,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:35:29,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:35:29,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:35:29,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:35:29,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:35:29,674 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:35:29,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:35:29,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:35:29,675 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:35:29,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:35:29,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:35:29,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:35:29,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:29,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:35:29,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:35:29,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:35:29,679 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:35:29,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:35:29,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:35:29,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:35:29,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:35:29,680 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_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 [2021-11-12 22:35:30,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:35:30,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:35:30,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:35:30,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:35:30,077 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:35:30,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-11-12 22:35:30,168 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data/d4ea67edd/c5f306d0fcfc45ec869ae1493c25ed6c/FLAGc8cebe094 [2021-11-12 22:35:30,718 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:35:30,719 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-11-12 22:35:30,735 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data/d4ea67edd/c5f306d0fcfc45ec869ae1493c25ed6c/FLAGc8cebe094 [2021-11-12 22:35:31,072 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data/d4ea67edd/c5f306d0fcfc45ec869ae1493c25ed6c [2021-11-12 22:35:31,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:35:31,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:35:31,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:31,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:35:31,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:35:31,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653fba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31, skipping insertion in model container [2021-11-12 22:35:31,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:35:31,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:35:31,348 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_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2021-11-12 22:35:31,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:31,391 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:35:31,405 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_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2021-11-12 22:35:31,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:31,426 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:35:31,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31 WrapperNode [2021-11-12 22:35:31,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:31,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:31,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:35:31,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:35:31,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:31,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:35:31,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:35:31,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:35:31,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:35:31,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:35:31,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:35:31,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:35:31,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (1/1) ... [2021-11-12 22:35:31,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:31,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:31,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:35:31,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:35:31,606 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:35:31,607 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:35:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:35:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:35:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:35:31,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:35:31,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:35:31,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:35:31,876 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:35:31,876 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:35:31,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:31 BoogieIcfgContainer [2021-11-12 22:35:31,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:35:31,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:35:31,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:35:31,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:35:31,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:35:31" (1/3) ... [2021-11-12 22:35:31,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dfde0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:31, skipping insertion in model container [2021-11-12 22:35:31,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:31" (2/3) ... [2021-11-12 22:35:31,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dfde0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:31, skipping insertion in model container [2021-11-12 22:35:31,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:31" (3/3) ... [2021-11-12 22:35:31,889 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2021-11-12 22:35:31,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:35:31,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:35:32,005 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:35:32,015 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 [2021-11-12 22:35:32,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:35:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:35:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 22:35:32,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:32,087 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:32,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:32,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1734137638, now seen corresponding path program 1 times [2021-11-12 22:35:32,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:32,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145531368] [2021-11-12 22:35:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:32,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:35:32,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145531368] [2021-11-12 22:35:32,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145531368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:32,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:32,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:35:32,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859107827] [2021-11-12 22:35:32,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:32,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:35:32,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:32,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:35:32,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:35:32,391 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:35:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:32,426 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-11-12 22:35:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:35:32,429 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-12 22:35:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:32,438 INFO L225 Difference]: With dead ends: 35 [2021-11-12 22:35:32,439 INFO L226 Difference]: Without dead ends: 20 [2021-11-12 22:35:32,442 INFO L932 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 [2021-11-12 22:35:32,447 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:32,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 13.47ms Time] [2021-11-12 22:35:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-12 22:35:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-12 22:35:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:35:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-12 22:35:32,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2021-11-12 22:35:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:32,495 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-12 22:35:32,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:35:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-12 22:35:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 22:35:32,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:32,498 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:32,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:35:32,503 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash -207211284, now seen corresponding path program 1 times [2021-11-12 22:35:32,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:32,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629382092] [2021-11-12 22:35:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:32,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:35:32,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:32,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629382092] [2021-11-12 22:35:32,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629382092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:32,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:32,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:35:32,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623892544] [2021-11-12 22:35:32,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:32,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:35:32,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:35:32,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:35:32,669 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:35:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:32,727 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-12 22:35:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:35:32,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-12 22:35:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:32,730 INFO L225 Difference]: With dead ends: 33 [2021-11-12 22:35:32,730 INFO L226 Difference]: Without dead ends: 22 [2021-11-12 22:35:32,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:35:32,738 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:32,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 15 Unknown, 0 Unchecked, 6.47ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 36.04ms Time] [2021-11-12 22:35:32,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-12 22:35:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-12 22:35:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:35:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-12 22:35:32,758 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2021-11-12 22:35:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:32,762 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-12 22:35:32,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:35:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-12 22:35:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-12 22:35:32,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:32,764 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:32,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:35:32,765 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:32,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1776102932, now seen corresponding path program 1 times [2021-11-12 22:35:32,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:32,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827198918] [2021-11-12 22:35:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:32,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:32,808 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:35:32,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333243685] [2021-11-12 22:35:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:32,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:32,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:32,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:35:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:32,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:35:32,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:35:33,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:35:33,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:33,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827198918] [2021-11-12 22:35:33,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:33,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333243685] [2021-11-12 22:35:33,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333243685] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:35:33,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:35:33,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2021-11-12 22:35:33,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292305614] [2021-11-12 22:35:33,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:33,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:35:33,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:35:33,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:35:33,693 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:35:36,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 22:35:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:36,406 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-11-12 22:35:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:35:36,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-12 22:35:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:36,410 INFO L225 Difference]: With dead ends: 34 [2021-11-12 22:35:36,411 INFO L226 Difference]: Without dead ends: 31 [2021-11-12 22:35:36,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:35:36,413 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2442.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2682.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:36,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 81 Invalid, 48 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2682.39ms Time] [2021-11-12 22:35:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-12 22:35:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-12 22:35:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:35:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-12 22:35:36,432 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2021-11-12 22:35:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:36,433 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-12 22:35:36,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:35:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-12 22:35:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 22:35:36,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:36,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:36,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:36,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:36,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1737998361, now seen corresponding path program 1 times [2021-11-12 22:35:36,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:36,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170324000] [2021-11-12 22:35:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:36,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:36,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:35:36,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888843461] [2021-11-12 22:35:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:36,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:36,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:36,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:36,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:35:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:35:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:35:36,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:35:36,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:36,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170324000] [2021-11-12 22:35:36,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:36,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888843461] [2021-11-12 22:35:36,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888843461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:36,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1853521707] [2021-11-12 22:35:37,017 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:35:37,017 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:35:37,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:35:37,030 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:35:37,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:35:37,076 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,080 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:37,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 22:35:37,085 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:37,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 22:35:37,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-12 22:35:37,113 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-11-12 22:35:37,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:37,134 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 [2021-11-12 22:35:37,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 22:35:37,136 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,138 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 22:35:37,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:37,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:37,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:37,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:37,176 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 [2021-11-12 22:35:37,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,180 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:37,181 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:37,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:37,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,195 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-12 22:35:37,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:35:37,198 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-12 22:35:37,204 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:35:37,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-12 22:35:37,246 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:35:37,303 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,323 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-12 22:35:37,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,562 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.3 percent of original size [2021-11-12 22:35:37,576 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:37,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:37,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:35:37,606 INFO L180 QuantifierPusher]: treesize reduction 33, result has 77.4 percent of original size [2021-11-12 22:35:37,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-12 22:35:37,639 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.3 percent of original size [2021-11-12 22:35:37,651 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:37,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,674 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:37,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:35:37,692 INFO L180 QuantifierPusher]: treesize reduction 33, result has 77.4 percent of original size [2021-11-12 22:35:37,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-12 22:35:37,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,787 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.6 percent of original size [2021-11-12 22:35:37,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-11-12 22:35:37,813 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.2 percent of original size [2021-11-12 22:35:37,817 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:35:37,824 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:35:37,837 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-12 22:35:37,850 INFO L180 QuantifierPusher]: treesize reduction 5, result has 95.8 percent of original size [2021-11-12 22:35:37,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:35:37,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:37,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-11-12 22:35:37,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:37,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 265 [2021-11-12 22:35:37,989 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:38,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 267 [2021-11-12 22:35:38,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,101 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.7 percent of original size [2021-11-12 22:35:38,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 22:35:38,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:38,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-12 22:35:38,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:38,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 22:35:38,122 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.7 percent of original size [2021-11-12 22:35:38,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 22:35:38,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,263 INFO L180 QuantifierPusher]: treesize reduction 6, result has 96.7 percent of original size [2021-11-12 22:35:38,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-11-12 22:35:38,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,334 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.9 percent of original size [2021-11-12 22:35:38,347 INFO L185 QuantifierPusher]: treesize reduction 33, result has 56.0 percent of original size 42 [2021-11-12 22:35:38,353 INFO L180 QuantifierPusher]: treesize reduction 33, result has 60.7 percent of original size [2021-11-12 22:35:38,355 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-12 22:35:38,359 INFO L180 QuantifierPusher]: treesize reduction 50, result has 2.0 percent of original size [2021-11-12 22:35:38,360 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 22:35:38,366 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.3 percent of original size [2021-11-12 22:35:38,374 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:38,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:38,384 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:38,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:35:38,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:38,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:35:38,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:38,444 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 66 for LOIs [2021-11-12 22:35:38,449 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:35:40,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1853521707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:40,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:35:40,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 5] total 18 [2021-11-12 22:35:40,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742237076] [2021-11-12 22:35:40,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:40,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:35:40,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:40,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:35:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:35:40,924 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:35:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:42,316 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-11-12 22:35:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:35:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-12 22:35:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:42,323 INFO L225 Difference]: With dead ends: 50 [2021-11-12 22:35:42,323 INFO L226 Difference]: Without dead ends: 39 [2021-11-12 22:35:42,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:35:42,326 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 369.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 441.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:42,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 71 Invalid, 165 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [14 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 441.29ms Time] [2021-11-12 22:35:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-12 22:35:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-11-12 22:35:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:35:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-12 22:35:42,346 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 19 [2021-11-12 22:35:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:42,347 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-12 22:35:42,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:35:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-12 22:35:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 22:35:42,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:42,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:42,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-12 22:35:42,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:42,563 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1736210901, now seen corresponding path program 1 times [2021-11-12 22:35:42,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:42,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658359070] [2021-11-12 22:35:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:42,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:42,599 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:35:42,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108745105] [2021-11-12 22:35:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:42,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:42,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:42,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:42,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 22:35:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:42,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:35:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:35:42,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:35:42,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:42,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658359070] [2021-11-12 22:35:42,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:42,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108745105] [2021-11-12 22:35:42,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108745105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:42,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916765058] [2021-11-12 22:35:42,843 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:35:42,844 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:35:42,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:35:42,844 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:35:42,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:35:42,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,857 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:42,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 22:35:42,859 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:42,859 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 22:35:42,862 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-12 22:35:42,865 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-11-12 22:35:42,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:42,875 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 [2021-11-12 22:35:42,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 22:35:42,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 22:35:42,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:42,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:42,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:42,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:42,902 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 [2021-11-12 22:35:42,903 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:42,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:42,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:42,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:42,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,914 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-12 22:35:42,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:35:42,915 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-12 22:35:42,921 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:35:42,933 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-12 22:35:42,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,957 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:35:42,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:42,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-12 22:35:42,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:42,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:42,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:42,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:42,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:42,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,053 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.3 percent of original size [2021-11-12 22:35:43,058 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:43,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:43,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:35:43,074 INFO L180 QuantifierPusher]: treesize reduction 33, result has 77.4 percent of original size [2021-11-12 22:35:43,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-12 22:35:43,090 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.3 percent of original size [2021-11-12 22:35:43,095 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:43,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:43,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:35:43,111 INFO L180 QuantifierPusher]: treesize reduction 33, result has 77.4 percent of original size [2021-11-12 22:35:43,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-12 22:35:43,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,163 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.6 percent of original size [2021-11-12 22:35:43,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-11-12 22:35:43,174 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.2 percent of original size [2021-11-12 22:35:43,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:35:43,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:35:43,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-11-12 22:35:43,191 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 22:35:43,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:35:43,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,277 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-12 22:35:43,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 262 [2021-11-12 22:35:43,296 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 264 [2021-11-12 22:35:43,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,385 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.7 percent of original size [2021-11-12 22:35:43,387 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-12 22:35:43,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-12 22:35:43,392 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 22:35:43,400 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.7 percent of original size [2021-11-12 22:35:43,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-12 22:35:43,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,512 INFO L180 QuantifierPusher]: treesize reduction 6, result has 96.7 percent of original size [2021-11-12 22:35:43,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-11-12 22:35:43,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,591 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.9 percent of original size [2021-11-12 22:35:43,599 INFO L185 QuantifierPusher]: treesize reduction 33, result has 56.6 percent of original size 43 [2021-11-12 22:35:43,607 INFO L180 QuantifierPusher]: treesize reduction 33, result has 61.2 percent of original size [2021-11-12 22:35:43,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-12 22:35:43,612 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.5 percent of original size [2021-11-12 22:35:43,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-12 22:35:43,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,637 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:43,638 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,647 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:43,648 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,648 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 22:35:43,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-12 22:35:43,651 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:43,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:43,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 22:35:43,665 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.3 percent of original size [2021-11-12 22:35:43,669 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:43,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:43,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:35:43,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:43,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:35:43,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:43,739 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-12 22:35:43,749 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 66 for LOIs [2021-11-12 22:35:43,753 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:35:46,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:46,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:35:46,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-12 22:35:46,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500869338] [2021-11-12 22:35:46,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-12 22:35:46,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:35:46,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:46,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:35:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:35:46,392 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:35:48,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:48,691 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2021-11-12 22:35:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:35:48,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2021-11-12 22:35:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:48,693 INFO L225 Difference]: With dead ends: 62 [2021-11-12 22:35:48,693 INFO L226 Difference]: Without dead ends: 53 [2021-11-12 22:35:48,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:35:48,695 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2079.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2238.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:48,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 95 Invalid, 53 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 1 Unknown, 0 Unchecked, 2238.72ms Time] [2021-11-12 22:35:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-12 22:35:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-11-12 22:35:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:35:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-11-12 22:35:48,706 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 19 [2021-11-12 22:35:48,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:48,706 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-11-12 22:35:48,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:35:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-11-12 22:35:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 22:35:48,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:48,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:48,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:48,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-12 22:35:48,923 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:48,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1948059783, now seen corresponding path program 1 times [2021-11-12 22:35:48,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:48,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744975331] [2021-11-12 22:35:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:48,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:48,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:35:48,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123127156] [2021-11-12 22:35:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:48,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:48,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:48,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:48,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 22:35:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:35:49,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:35:49,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:49,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:49,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744975331] [2021-11-12 22:35:49,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:49,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123127156] [2021-11-12 22:35:49,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~b~0#1|] [2021-11-12 22:35:49,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530644313] [2021-11-12 22:35:49,531 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:35:49,532 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:35:49,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:35:49,532 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:35:49,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:35:49,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,543 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:49,544 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 22:35:49,545 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:49,546 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 22:35:49,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-12 22:35:49,551 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 10=[|v_#valid_11|]} [2021-11-12 22:35:49,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:49,565 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 [2021-11-12 22:35:49,566 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 22:35:49,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 22:35:49,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:49,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:49,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:49,612 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 [2021-11-12 22:35:49,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:49,617 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:35:49,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:35:49,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,623 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-12 22:35:49,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:35:49,625 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:74 [2021-11-12 22:35:49,630 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:35:49,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,652 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-12 22:35:49,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:35:49,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-12 22:35:49,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,745 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.3 percent of original size [2021-11-12 22:35:49,749 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:49,750 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:49,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:35:49,766 INFO L180 QuantifierPusher]: treesize reduction 33, result has 77.4 percent of original size [2021-11-12 22:35:49,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-12 22:35:49,789 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.3 percent of original size [2021-11-12 22:35:49,796 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:49,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:49,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:35:49,816 INFO L180 QuantifierPusher]: treesize reduction 33, result has 77.4 percent of original size [2021-11-12 22:35:49,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-12 22:35:49,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,864 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.6 percent of original size [2021-11-12 22:35:49,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-11-12 22:35:49,869 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.2 percent of original size [2021-11-12 22:35:49,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:35:49,875 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:35:49,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-11-12 22:35:49,898 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.4 percent of original size [2021-11-12 22:35:49,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:35:49,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:49,951 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,958 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 257 [2021-11-12 22:35:49,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 262 [2021-11-12 22:35:49,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:49,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 264 [2021-11-12 22:35:49,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,048 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.7 percent of original size [2021-11-12 22:35:50,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-12 22:35:50,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:50,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-12 22:35:50,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:50,056 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-12 22:35:50,062 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.7 percent of original size [2021-11-12 22:35:50,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-12 22:35:50,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,138 INFO L180 QuantifierPusher]: treesize reduction 6, result has 96.7 percent of original size [2021-11-12 22:35:50,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-11-12 22:35:50,152 INFO L180 QuantifierPusher]: treesize reduction 31, result has 58.7 percent of original size [2021-11-12 22:35:50,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-11-12 22:35:50,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:50,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-11-12 22:35:50,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:50,171 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:50,173 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:50,188 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:50,189 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:50,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 22:35:50,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-12 22:35:50,194 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:50,195 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:50,201 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:50,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 22:35:50,207 INFO L180 QuantifierPusher]: treesize reduction 33, result has 76.3 percent of original size [2021-11-12 22:35:50,217 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:35:50,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:50,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:35:50,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:35:50,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:35:50,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-12 22:35:50,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:35:50,264 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2021-11-12 22:35:50,272 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 66 for LOIs [2021-11-12 22:35:50,276 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:35:52,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:35:52,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:52,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-12 22:35:52,958 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-12 22:35:52,958 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-12 22:35:52,963 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:35:52,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-12 22:35:53,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:53,177 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-12 22:35:53,180 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:35:53,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:35:53 BoogieIcfgContainer [2021-11-12 22:35:53,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:35:53,215 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:35:53,215 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:35:53,215 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:35:53,218 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:31" (3/4) ... [2021-11-12 22:35:53,222 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 22:35:53,222 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:35:53,222 INFO L158 Benchmark]: Toolchain (without parser) took 22145.66ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 60.8MB in the beginning and 96.8MB in the end (delta: -36.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:35:53,223 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 76.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:35:53,224 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.58ms. Allocated memory is still 102.8MB. Free memory was 60.7MB in the beginning and 77.2MB in the end (delta: -16.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:35:53,224 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.65ms. Allocated memory is still 102.8MB. Free memory was 77.2MB in the beginning and 75.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:35:53,224 INFO L158 Benchmark]: Boogie Preprocessor took 25.86ms. Allocated memory is still 102.8MB. Free memory was 75.6MB in the beginning and 74.8MB in the end (delta: 842.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:35:53,231 INFO L158 Benchmark]: RCFGBuilder took 388.17ms. Allocated memory is still 102.8MB. Free memory was 74.4MB in the beginning and 63.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:35:53,231 INFO L158 Benchmark]: TraceAbstraction took 21332.19ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 63.0MB in the beginning and 96.8MB in the end (delta: -33.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:35:53,238 INFO L158 Benchmark]: Witness Printer took 7.43ms. Allocated memory is still 130.0MB. Free memory is still 96.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:35:53,239 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 76.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.58ms. Allocated memory is still 102.8MB. Free memory was 60.7MB in the beginning and 77.2MB in the end (delta: -16.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.65ms. Allocated memory is still 102.8MB. Free memory was 77.2MB in the beginning and 75.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.86ms. Allocated memory is still 102.8MB. Free memory was 75.6MB in the beginning and 74.8MB in the end (delta: 842.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 388.17ms. Allocated memory is still 102.8MB. Free memory was 74.4MB in the beginning and 63.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 21332.19ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 63.0MB in the beginning and 96.8MB in the end (delta: -33.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 7.43ms. Allocated memory is still 130.0MB. Free memory is still 96.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = __VERIFIER_nondet_uint() [L31] CALL assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L32] CALL assume_abort_if_not(B >= 1) [L16] COND FALSE !(!cond) [L32] RET assume_abort_if_not(B >= 1) [L33] q = 0 [L34] r = A [L35] b = B [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND TRUE !(r >= b) [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L41] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.2s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 60 SdHoareTripleChecker+Valid, 5411.90ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 56 mSDsluCounter, 323 SdHoareTripleChecker+Invalid, 4931.53ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 242 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 254 IncrementalHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 98 mSDtfsCounter, 254 mSolverCounterSat, 17.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=5, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 151 ConstructedInterpolants, 0 QuantifiedInterpolants, 565 SizeOfPredicates, 8 NumberOfNonLiveVariables, 298 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 17/29 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: OVERALL_TIME: 1432.66ms, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 15, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 20, TOOLS_POST_TIME: 326.44ms, TOOLS_POST_CALL_APPLICATIONS: 6, TOOLS_POST_CALL_TIME: 193.42ms, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 110.86ms, TOOLS_QUANTIFIERELIM_APPLICATIONS: 30, TOOLS_QUANTIFIERELIM_TIME: 613.42ms, TOOLS_QUANTIFIERELIM_MAX_TIME: 124.65ms, FLUID_QUERY_TIME: 4.11ms, FLUID_QUERIES: 48, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 510.05ms, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.00ms, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 165.14ms, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 16.73ms, DOMAIN_ISBOTTOM_APPLICATIONS: 15, DOMAIN_ISBOTTOM_TIME: 38.97ms, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 299.80ms, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 299.69ms, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 1.93ms, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 1.85ms, PROCEDURE_GRAPH_BUILDER_TIME: 4.71ms, PATH_EXPR_TIME: 3.18ms, REGEX_TO_DAG_TIME: 4.10ms, DAG_COMPRESSION_TIME: 15.92ms, DAG_COMPRESSION_PROCESSED_NODES: 210, DAG_COMPRESSION_RETAINED_NODES: 43, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 22:35:53,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/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_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF --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 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:35:56,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:35:56,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:35:56,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:35:56,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:35:56,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:35:56,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:35:56,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:35:56,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:35:56,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:35:56,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:35:56,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:35:56,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:35:56,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:35:56,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:35:56,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:35:56,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:35:56,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:35:56,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:35:56,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:35:56,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:35:56,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:35:56,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:35:56,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:35:56,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:35:56,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:35:56,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:35:56,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:35:56,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:35:56,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:35:56,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:35:56,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:35:56,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:35:56,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:35:56,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:35:56,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:35:56,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:35:56,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:35:56,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:35:56,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:35:56,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:35:56,188 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:35:56,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:35:56,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:35:56,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:35:56,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:35:56,219 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:35:56,219 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:35:56,219 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:35:56,220 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:35:56,220 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:35:56,220 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:35:56,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:35:56,221 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:35:56,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:35:56,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:35:56,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:35:56,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:35:56,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:35:56,223 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:35:56,223 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:35:56,224 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:35:56,224 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:35:56,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:35:56,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:35:56,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:35:56,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:35:56,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:35:56,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:35:56,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:56,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:35:56,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:35:56,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:35:56,227 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:35:56,228 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:56,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:35:56,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:35:56,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:35:56,229 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_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 [2021-11-12 22:35:56,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:35:56,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:35:56,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:35:56,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:35:56,729 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:35:56,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-11-12 22:35:56,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data/d9a032344/c5223bf8d5294a6c8a3caa063a9507c3/FLAGd704537d5 [2021-11-12 22:35:57,453 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:35:57,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-11-12 22:35:57,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data/d9a032344/c5223bf8d5294a6c8a3caa063a9507c3/FLAGd704537d5 [2021-11-12 22:35:57,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/data/d9a032344/c5223bf8d5294a6c8a3caa063a9507c3 [2021-11-12 22:35:57,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:35:57,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:35:57,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:57,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:35:57,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:35:57,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:57" (1/1) ... [2021-11-12 22:35:57,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10679667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:57, skipping insertion in model container [2021-11-12 22:35:57,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:57" (1/1) ... [2021-11-12 22:35:57,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:35:57,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:35:58,015 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_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2021-11-12 22:35:58,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:58,046 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:35:58,087 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_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2021-11-12 22:35:58,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:58,150 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:35:58,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58 WrapperNode [2021-11-12 22:35:58,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:58,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:58,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:35:58,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:35:58,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:58,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:35:58,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:35:58,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:35:58,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:35:58,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:35:58,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:35:58,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:35:58,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (1/1) ... [2021-11-12 22:35:58,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:58,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:58,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:35:58,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:35:58,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:35:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:35:58,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:35:58,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:35:58,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:35:58,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:35:58,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:35:58,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:35:58,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:35:58,703 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:35:58,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:58 BoogieIcfgContainer [2021-11-12 22:35:58,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:35:58,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:35:58,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:35:58,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:35:58,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:35:57" (1/3) ... [2021-11-12 22:35:58,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa7d155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:58, skipping insertion in model container [2021-11-12 22:35:58,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:58" (2/3) ... [2021-11-12 22:35:58,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa7d155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:58, skipping insertion in model container [2021-11-12 22:35:58,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:58" (3/3) ... [2021-11-12 22:35:58,716 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2021-11-12 22:35:58,723 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:35:58,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:35:58,827 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:35:58,837 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 [2021-11-12 22:35:58,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:35:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:35:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 22:35:58,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:58,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:58,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2021-11-12 22:35:58,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:58,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852464857] [2021-11-12 22:35:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:58,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:58,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:58,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:58,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:35:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:59,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:35:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:35:59,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:35:59,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:59,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852464857] [2021-11-12 22:35:59,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852464857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:59,256 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:59,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:35:59,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716755591] [2021-11-12 22:35:59,267 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:59,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:35:59,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:35:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:35:59,323 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:35:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:59,359 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-11-12 22:35:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:35:59,365 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-12 22:35:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:59,379 INFO L225 Difference]: With dead ends: 53 [2021-11-12 22:35:59,380 INFO L226 Difference]: Without dead ends: 24 [2021-11-12 22:35:59,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:35:59,390 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:59,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:35:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-12 22:35:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-12 22:35:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:35:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-12 22:35:59,436 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2021-11-12 22:35:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:59,437 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-12 22:35:59,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:35:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-12 22:35:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:35:59,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:59,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:59,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:59,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:59,651 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2021-11-12 22:35:59,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:59,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533299918] [2021-11-12 22:35:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:59,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:59,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:59,658 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:59,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:35:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:59,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:35:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:35:59,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:00,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:00,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533299918] [2021-11-12 22:36:00,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533299918] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:00,032 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:00,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-12 22:36:00,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618103325] [2021-11-12 22:36:00,033 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:00,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:36:00,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:00,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:36:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:36:00,038 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:36:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:00,111 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-11-12 22:36:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:36:00,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2021-11-12 22:36:00,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:00,115 INFO L225 Difference]: With dead ends: 42 [2021-11-12 22:36:00,116 INFO L226 Difference]: Without dead ends: 30 [2021-11-12 22:36:00,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:36:00,120 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:00,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 71 Invalid, 18 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 33.94ms Time] [2021-11-12 22:36:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-12 22:36:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-12 22:36:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 22:36:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-12 22:36:00,145 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 21 [2021-11-12 22:36:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:00,148 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-12 22:36:00,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:36:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-12 22:36:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:36:00,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:00,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:00,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:36:00,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:00,365 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:00,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:00,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2021-11-12 22:36:00,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:00,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908812455] [2021-11-12 22:36:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:00,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:00,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:00,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:36:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:00,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:36:00,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:36:00,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:01,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:01,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908812455] [2021-11-12 22:36:01,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908812455] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:36:01,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:36:01,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-11-12 22:36:01,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137909797] [2021-11-12 22:36:01,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:01,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:36:01,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:02,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:36:02,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:36:02,001 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:36:02,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:02,478 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-11-12 22:36:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:36:02,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-12 22:36:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:02,482 INFO L225 Difference]: With dead ends: 40 [2021-11-12 22:36:02,482 INFO L226 Difference]: Without dead ends: 37 [2021-11-12 22:36:02,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:36:02,485 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 356.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.58ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 399.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:02,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 2.58ms Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 399.24ms Time] [2021-11-12 22:36:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-12 22:36:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-12 22:36:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:36:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-11-12 22:36:02,498 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 22 [2021-11-12 22:36:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:02,499 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-11-12 22:36:02,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:36:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-11-12 22:36:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-12 22:36:02,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:02,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:02,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:36:02,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:02,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2021-11-12 22:36:02,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:02,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812182345] [2021-11-12 22:36:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:02,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:02,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:02,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:36:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:36:02,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:36:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:36:03,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:03,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812182345] [2021-11-12 22:36:03,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812182345] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:03,268 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:03,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 22:36:03,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198794794] [2021-11-12 22:36:03,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:03,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:36:03,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:03,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:36:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:36:03,273 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:36:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:03,433 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-11-12 22:36:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:36:03,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-12 22:36:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:03,436 INFO L225 Difference]: With dead ends: 49 [2021-11-12 22:36:03,436 INFO L226 Difference]: Without dead ends: 46 [2021-11-12 22:36:03,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:36:03,438 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.08ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:03,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 36 Unknown, 0 Unchecked, 5.08ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 122.80ms Time] [2021-11-12 22:36:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-12 22:36:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2021-11-12 22:36:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:36:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-12 22:36:03,449 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 25 [2021-11-12 22:36:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:03,450 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-12 22:36:03,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:36:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-12 22:36:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 22:36:03,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:03,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:03,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:03,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:03,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:03,666 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2021-11-12 22:36:03,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:03,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415990360] [2021-11-12 22:36:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:03,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:03,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:03,668 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:03,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:36:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:36:03,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:03,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:03,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:03,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415990360] [2021-11-12 22:36:03,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415990360] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:03,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:03,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:36:03,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250499932] [2021-11-12 22:36:03,956 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:03,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:36:03,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:36:03,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:36:03,959 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:36:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:03,994 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-11-12 22:36:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:36:03,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-12 22:36:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:03,995 INFO L225 Difference]: With dead ends: 64 [2021-11-12 22:36:03,995 INFO L226 Difference]: Without dead ends: 39 [2021-11-12 22:36:03,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:36:03,998 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:03,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 9 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 18.68ms Time] [2021-11-12 22:36:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-12 22:36:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-11-12 22:36:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:36:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-11-12 22:36:04,008 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 31 [2021-11-12 22:36:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:04,009 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-11-12 22:36:04,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:36:04,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-11-12 22:36:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-12 22:36:04,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:04,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:04,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:04,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:04,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:04,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2021-11-12 22:36:04,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:04,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200751136] [2021-11-12 22:36:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:04,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:04,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:04,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:04,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:36:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:36:04,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:05,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:09,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:09,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200751136] [2021-11-12 22:36:09,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200751136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:09,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917357507] [2021-11-12 22:36:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:09,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:09,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:09,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:09,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:36:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:10,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:36:10,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:11,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:13,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917357507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:13,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657976366] [2021-11-12 22:36:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:13,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:13,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:13,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 22:36:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:13,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:36:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:36:16,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:19,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657976366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:19,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:36:19,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8, 7, 12, 9] total 32 [2021-11-12 22:36:19,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906361775] [2021-11-12 22:36:19,429 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:36:19,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:36:19,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:19,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:36:19,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:36:19,433 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 28 states have internal predecessors, (86), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-12 22:36:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:20,523 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-11-12 22:36:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:36:20,526 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 28 states have internal predecessors, (86), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2021-11-12 22:36:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:20,530 INFO L225 Difference]: With dead ends: 77 [2021-11-12 22:36:20,530 INFO L226 Difference]: Without dead ends: 75 [2021-11-12 22:36:20,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2021-11-12 22:36:20,533 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.03ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 199.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:20,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 358 Invalid, 125 Unknown, 0 Unchecked, 4.03ms Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 36 Unchecked, 199.80ms Time] [2021-11-12 22:36:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-12 22:36:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-11-12 22:36:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:36:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-12 22:36:20,546 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 34 [2021-11-12 22:36:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:20,546 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-12 22:36:20,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 28 states have internal predecessors, (86), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-12 22:36:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-12 22:36:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-12 22:36:20,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:20,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:20,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:20,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:20,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:21,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:21,164 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash 673628592, now seen corresponding path program 1 times [2021-11-12 22:36:21,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:21,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358075955] [2021-11-12 22:36:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:21,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:21,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:21,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:21,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:36:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:21,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:36:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:21,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:21,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:21,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358075955] [2021-11-12 22:36:21,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358075955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:21,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1924334305] [2021-11-12 22:36:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:21,562 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:21,574 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:21,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:36:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:36:21,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:21,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:21,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1924334305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:21,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331944051] [2021-11-12 22:36:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:21,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:21,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:21,903 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:21,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 22:36:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:21,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:36:21,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:22,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:22,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331944051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:22,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:36:22,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 7, 8] total 17 [2021-11-12 22:36:22,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55206508] [2021-11-12 22:36:22,466 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:36:22,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 22:36:22,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:22,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 22:36:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:36:22,468 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-12 22:36:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:23,465 INFO L93 Difference]: Finished difference Result 242 states and 283 transitions. [2021-11-12 22:36:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:36:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 34 [2021-11-12 22:36:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:23,471 INFO L225 Difference]: With dead ends: 242 [2021-11-12 22:36:23,471 INFO L226 Difference]: Without dead ends: 231 [2021-11-12 22:36:23,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:36:23,473 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 173 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 533.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.55ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 637.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:23,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 422 Invalid, 255 Unknown, 0 Unchecked, 5.55ms Time], IncrementalHoareTripleChecker [85 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 637.52ms Time] [2021-11-12 22:36:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-12 22:36:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2021-11-12 22:36:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 166 states have (on average 1.2409638554216869) internal successors, (206), 174 states have internal predecessors, (206), 27 states have call successors, (27), 22 states have call predecessors, (27), 21 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 22:36:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2021-11-12 22:36:23,521 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 255 transitions. Word has length 34 [2021-11-12 22:36:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:23,521 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 255 transitions. [2021-11-12 22:36:23,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-12 22:36:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 255 transitions. [2021-11-12 22:36:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-12 22:36:23,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:23,525 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:23,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:23,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:23,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:24,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:24,131 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1153752708, now seen corresponding path program 1 times [2021-11-12 22:36:24,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:24,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498894788] [2021-11-12 22:36:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:24,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:24,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:24,134 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:24,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:36:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:24,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:36:24,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:36:24,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:36:25,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:25,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498894788] [2021-11-12 22:36:25,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498894788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:25,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1255080798] [2021-11-12 22:36:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:25,317 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:25,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:25,329 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:25,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:36:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:25,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:36:25,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:36:25,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:36:26,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1255080798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:26,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179258995] [2021-11-12 22:36:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:26,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:26,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:26,088 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:26,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:36:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:36:26,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:36:26,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:36:26,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179258995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:26,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:36:26,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 9 [2021-11-12 22:36:26,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842318420] [2021-11-12 22:36:26,685 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:36:26,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:36:26,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:36:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:36:26,687 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:36:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:27,306 INFO L93 Difference]: Finished difference Result 237 states and 276 transitions. [2021-11-12 22:36:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:36:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-11-12 22:36:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:27,312 INFO L225 Difference]: With dead ends: 237 [2021-11-12 22:36:27,312 INFO L226 Difference]: Without dead ends: 212 [2021-11-12 22:36:27,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:36:27,314 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 489.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 533.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:27,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 93 Invalid, 40 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 533.73ms Time] [2021-11-12 22:36:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-12 22:36:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-12 22:36:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 166 states have (on average 1.2108433734939759) internal successors, (201), 171 states have internal predecessors, (201), 24 states have call successors, (24), 22 states have call predecessors, (24), 21 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 22:36:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 247 transitions. [2021-11-12 22:36:27,343 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 247 transitions. Word has length 40 [2021-11-12 22:36:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:27,344 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 247 transitions. [2021-11-12 22:36:27,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:36:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 247 transitions. [2021-11-12 22:36:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 22:36:27,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:27,347 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:27,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:27,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:27,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:27,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:27,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1498366856, now seen corresponding path program 1 times [2021-11-12 22:36:27,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:27,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581891533] [2021-11-12 22:36:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:27,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:27,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:27,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:27,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:36:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:28,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:36:28,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:36:28,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:36:28,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:28,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581891533] [2021-11-12 22:36:28,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581891533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:28,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1537063297] [2021-11-12 22:36:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:28,358 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:28,358 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:28,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:36:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:28,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:36:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:36:28,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:36:28,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1537063297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:28,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64355759] [2021-11-12 22:36:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:28,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:28,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:28,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:28,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:36:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:28,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:36:28,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:36:28,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:36:29,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64355759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:29,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:36:29,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 7, 7] total 18 [2021-11-12 22:36:29,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277693099] [2021-11-12 22:36:29,179 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:36:29,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:36:29,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:36:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:36:29,181 INFO L87 Difference]: Start difference. First operand 212 states and 247 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-12 22:36:29,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:29,566 INFO L93 Difference]: Finished difference Result 357 states and 411 transitions. [2021-11-12 22:36:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:36:29,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 39 [2021-11-12 22:36:29,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:29,576 INFO L225 Difference]: With dead ends: 357 [2021-11-12 22:36:29,576 INFO L226 Difference]: Without dead ends: 236 [2021-11-12 22:36:29,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:36:29,584 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 247.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.19ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 292.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:29,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 211 Invalid, 190 Unknown, 0 Unchecked, 3.19ms Time], IncrementalHoareTripleChecker [54 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 292.61ms Time] [2021-11-12 22:36:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-12 22:36:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 212. [2021-11-12 22:36:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 166 states have (on average 1.1927710843373494) internal successors, (198), 171 states have internal predecessors, (198), 24 states have call successors, (24), 22 states have call predecessors, (24), 21 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-12 22:36:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 244 transitions. [2021-11-12 22:36:29,640 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 244 transitions. Word has length 39 [2021-11-12 22:36:29,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:29,641 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 244 transitions. [2021-11-12 22:36:29,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-12 22:36:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 244 transitions. [2021-11-12 22:36:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-12 22:36:29,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:29,654 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:29,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:29,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:30,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 22:36:30,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:30,263 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1668648592, now seen corresponding path program 2 times [2021-11-12 22:36:30,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:30,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721465871] [2021-11-12 22:36:30,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:36:30,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:30,266 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:30,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:36:30,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:36:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:36:30,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:36:30,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 2 refuted. 9 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:48,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:54,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:54,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721465871] [2021-11-12 22:36:54,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721465871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:54,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37945669] [2021-11-12 22:36:54,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:36:54,922 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:54,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:54,923 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:54,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:36:55,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:36:55,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:36:55,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:36:55,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 2 refuted. 9 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:56,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:36:58,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [37945669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:58,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794700975] [2021-11-12 22:36:58,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:36:58,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:58,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:58,086 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:58,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 22:36:58,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:36:58,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:36:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:36:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 5 refuted. 9 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:36:59,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:37:01,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794700975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:01,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:37:01,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 13, 11] total 22 [2021-11-12 22:37:01,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526775768] [2021-11-12 22:37:01,064 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:37:01,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 22:37:01,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:37:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 22:37:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=357, Unknown=7, NotChecked=0, Total=462 [2021-11-12 22:37:01,067 INFO L87 Difference]: Start difference. First operand 212 states and 244 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-12 22:37:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:22,118 INFO L93 Difference]: Finished difference Result 253 states and 292 transitions. [2021-11-12 22:37:22,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:37:22,120 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2021-11-12 22:37:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:22,123 INFO L225 Difference]: With dead ends: 253 [2021-11-12 22:37:22,123 INFO L226 Difference]: Without dead ends: 246 [2021-11-12 22:37:22,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 213 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=134, Invalid=503, Unknown=13, NotChecked=0, Total=650 [2021-11-12 22:37:22,125 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 334.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.17ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 370.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:22,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 473 Invalid, 134 Unknown, 0 Unchecked, 3.17ms Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 49 Unchecked, 370.18ms Time] [2021-11-12 22:37:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-12 22:37:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 230. [2021-11-12 22:37:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 179 states have (on average 1.1731843575418994) internal successors, (210), 184 states have internal predecessors, (210), 27 states have call successors, (27), 24 states have call predecessors, (27), 23 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-12 22:37:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 262 transitions. [2021-11-12 22:37:22,150 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 262 transitions. Word has length 40 [2021-11-12 22:37:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:22,150 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 262 transitions. [2021-11-12 22:37:22,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-12 22:37:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 262 transitions. [2021-11-12 22:37:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-12 22:37:22,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:22,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:22,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:22,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:22,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:22,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:37:22,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash 886516180, now seen corresponding path program 2 times [2021-11-12 22:37:22,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:37:22,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112541385] [2021-11-12 22:37:22,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:37:22,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:37:22,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:37:22,770 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:37:22,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:37:22,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:37:22,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:37:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:37:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:37:23,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:37:23,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:37:23,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112541385] [2021-11-12 22:37:23,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112541385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:23,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [606015423] [2021-11-12 22:37:23,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:37:23,522 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:23,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:37:23,527 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:37:23,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:37:23,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:37:23,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:37:23,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:37:23,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:37:23,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:37:24,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [606015423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:24,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870040799] [2021-11-12 22:37:24,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:37:24,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:37:24,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:37:24,138 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:37:24,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 22:37:24,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:37:24,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:37:24,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:37:24,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:37:24,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:37:24,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870040799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:24,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:37:24,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 9, 6] total 17 [2021-11-12 22:37:24,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129179545] [2021-11-12 22:37:24,912 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:37:24,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 22:37:24,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:37:24,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 22:37:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:37:24,914 INFO L87 Difference]: Start difference. First operand 230 states and 262 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-12 22:37:25,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:25,431 INFO L93 Difference]: Finished difference Result 303 states and 347 transitions. [2021-11-12 22:37:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:37:25,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 43 [2021-11-12 22:37:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:25,436 INFO L225 Difference]: With dead ends: 303 [2021-11-12 22:37:25,436 INFO L226 Difference]: Without dead ends: 196 [2021-11-12 22:37:25,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:37:25,438 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 49 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 371.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 398.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:25,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 113 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [23 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 398.38ms Time] [2021-11-12 22:37:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-12 22:37:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-11-12 22:37:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 153 states have (on average 1.1699346405228759) internal successors, (179), 157 states have internal predecessors, (179), 23 states have call successors, (23), 20 states have call predecessors, (23), 19 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-12 22:37:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 223 transitions. [2021-11-12 22:37:25,473 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 223 transitions. Word has length 43 [2021-11-12 22:37:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:25,473 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 223 transitions. [2021-11-12 22:37:25,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-12 22:37:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 223 transitions. [2021-11-12 22:37:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 22:37:25,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:25,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:25,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:25,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:25,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:26,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:26,083 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:26,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2006317561, now seen corresponding path program 3 times [2021-11-12 22:37:26,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:37:26,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739506071] [2021-11-12 22:37:26,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:37:26,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:37:26,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:37:26,085 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:37:26,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:37:26,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:37:26,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:37:26,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:37:26,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:37:26,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:37:26,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:37:26,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739506071] [2021-11-12 22:37:26,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739506071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:26,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1422340660] [2021-11-12 22:37:26,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:37:26,724 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:37:26,725 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:37:26,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:37:26,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:37:26,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:37:26,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:37:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:37:27,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:37:27,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1422340660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:27,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985488314] [2021-11-12 22:37:27,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:37:27,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:37:27,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:37:27,255 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:37:27,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 22:37:27,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:37:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:37:27,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:37:27,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:37:27,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:37:27,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985488314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:27,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:37:27,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 8, 9] total 16 [2021-11-12 22:37:27,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749136163] [2021-11-12 22:37:27,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:37:27,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:37:27,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:37:27,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:37:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:37:27,651 INFO L87 Difference]: Start difference. First operand 196 states and 223 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-12 22:37:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:28,634 INFO L93 Difference]: Finished difference Result 295 states and 340 transitions. [2021-11-12 22:37:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:37:28,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 46 [2021-11-12 22:37:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:28,637 INFO L225 Difference]: With dead ends: 295 [2021-11-12 22:37:28,637 INFO L226 Difference]: Without dead ends: 138 [2021-11-12 22:37:28,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:37:28,640 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 172 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 312.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 362.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:28,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 372 Invalid, 213 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [70 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 362.84ms Time] [2021-11-12 22:37:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-12 22:37:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2021-11-12 22:37:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 110 states have (on average 1.1090909090909091) internal successors, (122), 113 states have internal predecessors, (122), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-12 22:37:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 148 transitions. [2021-11-12 22:37:28,666 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 148 transitions. Word has length 46 [2021-11-12 22:37:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:28,666 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 148 transitions. [2021-11-12 22:37:28,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-12 22:37:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 148 transitions. [2021-11-12 22:37:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 22:37:28,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:28,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:28,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-12 22:37:28,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 22:37:29,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-12 22:37:29,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:29,283 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:29,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2008105021, now seen corresponding path program 3 times [2021-11-12 22:37:29,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:37:29,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477408291] [2021-11-12 22:37:29,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:37:29,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:37:29,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:37:29,285 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:37:29,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:37:30,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:37:30,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:37:30,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:37:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:37:31,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:37:54,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:37:54,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477408291] [2021-11-12 22:37:54,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477408291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:37:54,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1212079342] [2021-11-12 22:37:54,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:37:54,297 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:37:54,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:37:54,298 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:37:54,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 22:37:54,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:37:54,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:37:54,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:37:54,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:37:57,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:38:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1212079342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:38:02,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608476737] [2021-11-12 22:38:02,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:38:02,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:38:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:38:02,558 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:38:02,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-12 22:38:33,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:38:33,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:38:33,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:38:33,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:38:41,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:38:48,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608476737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:38:48,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:38:48,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14, 13, 14, 13] total 25 [2021-11-12 22:38:48,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910153706] [2021-11-12 22:38:48,199 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:38:48,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:38:48,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:38:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=485, Unknown=3, NotChecked=0, Total=600 [2021-11-12 22:38:48,201 INFO L87 Difference]: Start difference. First operand 135 states and 148 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-12 22:38:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:56,744 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-11-12 22:38:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:38:56,747 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2021-11-12 22:38:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:56,748 INFO L225 Difference]: With dead ends: 151 [2021-11-12 22:38:56,748 INFO L226 Difference]: Without dead ends: 141 [2021-11-12 22:38:56,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 245 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=157, Invalid=709, Unknown=4, NotChecked=0, Total=870 [2021-11-12 22:38:56,750 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1731.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1848.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:56,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 371 Invalid, 139 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 46 Unchecked, 1848.44ms Time] [2021-11-12 22:38:56,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-12 22:38:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2021-11-12 22:38:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 114 states have (on average 1.105263157894737) internal successors, (126), 116 states have internal predecessors, (126), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-12 22:38:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 152 transitions. [2021-11-12 22:38:56,767 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 152 transitions. Word has length 46 [2021-11-12 22:38:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:56,767 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 152 transitions. [2021-11-12 22:38:56,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-12 22:38:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 152 transitions. [2021-11-12 22:38:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 22:38:56,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:56,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:56,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:57,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:57,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:57,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:38:57,379 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash -233097659, now seen corresponding path program 1 times [2021-11-12 22:38:57,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:57,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420293374] [2021-11-12 22:38:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:57,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:57,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:57,381 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:57,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:38:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:57,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:38:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 10 refuted. 3 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:39:07,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:39:20,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:20,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420293374] [2021-11-12 22:39:20,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420293374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:20,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1607287535] [2021-11-12 22:39:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:20,356 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:39:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:39:20,364 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:39:20,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 22:39:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:39:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 9 refuted. 3 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:39:23,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:39:33,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1607287535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:39:33,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221030745] [2021-11-12 22:39:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:33,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:39:33,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:39:33,611 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:39:33,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 22:39:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:34,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:39:34,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:39:39,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:40:02,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221030745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:02,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:40:02,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10, 10, 17, 13] total 46 [2021-11-12 22:40:02,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171531503] [2021-11-12 22:40:02,068 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:40:02,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-12 22:40:02,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-12 22:40:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1695, Unknown=8, NotChecked=0, Total=2070 [2021-11-12 22:40:02,070 INFO L87 Difference]: Start difference. First operand 139 states and 152 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 41 states have internal predecessors, (121), 17 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-12 22:40:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:25,192 INFO L93 Difference]: Finished difference Result 170 states and 185 transitions. [2021-11-12 22:40:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-12 22:40:25,195 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 41 states have internal predecessors, (121), 17 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 46 [2021-11-12 22:40:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:25,197 INFO L225 Difference]: With dead ends: 170 [2021-11-12 22:40:25,197 INFO L226 Difference]: Without dead ends: 129 [2021-11-12 22:40:25,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 61.1s TimeCoverageRelationStatistics Valid=476, Invalid=2269, Unknown=11, NotChecked=0, Total=2756 [2021-11-12 22:40:25,200 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 196 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7996.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.34ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 8331.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:25,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 468 Invalid, 477 Unknown, 0 Unchecked, 5.34ms Time], IncrementalHoareTripleChecker [69 Valid, 286 Invalid, 0 Unknown, 122 Unchecked, 8331.01ms Time] [2021-11-12 22:40:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-12 22:40:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2021-11-12 22:40:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 92 states have (on average 1.108695652173913) internal successors, (102), 94 states have internal predecessors, (102), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 22:40:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-11-12 22:40:25,221 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 46 [2021-11-12 22:40:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:25,222 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-11-12 22:40:25,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 41 states have internal predecessors, (121), 17 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-12 22:40:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-11-12 22:40:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 22:40:25,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:25,223 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:25,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:25,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:25,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:25,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:25,835 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1216416884, now seen corresponding path program 1 times [2021-11-12 22:40:25,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:25,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794670745] [2021-11-12 22:40:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:25,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:25,837 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:25,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:40:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:40:25,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 22:40:26,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 106 proven. 40 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-12 22:40:26,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:26,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794670745] [2021-11-12 22:40:26,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794670745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:26,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [529754612] [2021-11-12 22:40:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:26,527 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:40:26,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:40:26,528 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:40:26,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 22:40:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:26,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:40:26,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 22:40:26,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 106 proven. 40 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-12 22:40:27,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [529754612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:27,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311770508] [2021-11-12 22:40:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:27,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:40:27,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:40:27,140 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:40:27,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-12 22:40:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-12 22:40:27,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 32 proven. 155 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:40:27,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-12 22:40:27,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311770508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:40:27,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:40:27,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 13, 8] total 26 [2021-11-12 22:40:27,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387420887] [2021-11-12 22:40:27,904 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:40:27,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 22:40:27,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 22:40:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:40:27,907 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-12 22:40:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:28,153 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-11-12 22:40:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:40:28,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 72 [2021-11-12 22:40:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:28,154 INFO L225 Difference]: With dead ends: 111 [2021-11-12 22:40:28,154 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 22:40:28,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:40:28,156 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:28,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 143 Invalid, 152 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [17 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 141.94ms Time] [2021-11-12 22:40:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 22:40:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 22:40:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 22:40:28,158 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2021-11-12 22:40:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:28,159 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 22:40:28,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-12 22:40:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 22:40:28,160 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 22:40:28,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:40:28,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:28,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:28,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:28,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:40:28,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 22:40:35,359 WARN L227 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 122 DAG size of output: 72 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:41:12,834 WARN L227 SmtUtils]: Spent 37.46s on a formula simplification. DAG size of input: 88 DAG size of output: 40 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:41:17,096 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 22:41:17,096 INFO L854 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (= ~counter~0 (_ bv0 32)) [2021-11-12 22:41:17,097 INFO L854 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= ~counter~0 (_ bv0 32)) (bvult |ULTIMATE.start_main_~B~0#1| (_ bv2147483647 32))) [2021-11-12 22:41:17,097 INFO L858 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2021-11-12 22:41:17,097 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 49) no Hoare annotation was computed. [2021-11-12 22:41:17,097 INFO L854 garLoopResultBuilder]: At program point L40-2(lines 40 49) the Hoare annotation is: (or (and (not (bvslt (bvadd ~counter~0 (_ bv5 32)) (_ bv5 32))) (exists ((|v_ULTIMATE.start_main_~b~0#1_133| (_ BitVec 32))) (let ((.cse1 (bvmul |v_ULTIMATE.start_main_~b~0#1_133| (_ bv4 32)))) (let ((.cse2 (bvudiv .cse1 (_ bv2 32)))) (let ((.cse0 (bvneg .cse2))) (and (bvuge |ULTIMATE.start_main_~A~0#1| (bvmul |v_ULTIMATE.start_main_~b~0#1_133| (_ bv2 32))) (= |ULTIMATE.start_main_~r~0#1| (bvadd .cse0 (bvneg |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~A~0#1|)) (not (bvuge |ULTIMATE.start_main_~A~0#1| .cse1)) (bvuge (bvadd .cse0 |ULTIMATE.start_main_~A~0#1|) |ULTIMATE.start_main_~b~0#1|) (= (bvudiv .cse2 (_ bv2 32)) |ULTIMATE.start_main_~b~0#1|)))))) (= |ULTIMATE.start_main_~q~0#1| (_ bv3 32)) (bvult |ULTIMATE.start_main_~B~0#1| (_ bv2147483647 32)) (not (bvslt ~counter~0 (_ bv5 32)))) (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|)) [2021-11-12 22:41:17,097 INFO L858 garLoopResultBuilder]: For program point L36-1(lines 36 39) no Hoare annotation was computed. [2021-11-12 22:41:17,097 INFO L854 garLoopResultBuilder]: At program point L36-3(lines 36 39) the Hoare annotation is: (let ((.cse0 (exists ((|v_ULTIMATE.start_main_~b~0#1_67| (_ BitVec 32))) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~b~0#1_67|)))) (.cse5 (exists ((|v_ULTIMATE.start_main_~b~0#1_133| (_ BitVec 32))) (and (bvuge |ULTIMATE.start_main_~r~0#1| (bvmul |v_ULTIMATE.start_main_~b~0#1_133| (_ bv2 32))) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv4 32) |v_ULTIMATE.start_main_~b~0#1_133|))))) (.cse1 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32))) (.cse3 (exists ((|v_ULTIMATE.start_main_~b~0#1_29| (_ BitVec 32))) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv2 32) |v_ULTIMATE.start_main_~b~0#1_29|)))) (.cse4 (bvult |ULTIMATE.start_main_~B~0#1| (_ bv2147483647 32)))) (or (and (= (_ bv3 32) ~counter~0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and (= ~counter~0 (_ bv5 32)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 .cse1 .cse2 .cse3 (= (_ bv4 32) ~counter~0) .cse4 .cse5) (and .cse2 (= ~counter~0 (_ bv0 32)) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|) (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|) (bvuge |ULTIMATE.start_main_~b~0#1| (_ bv1 32)) .cse4) (and (= ~counter~0 (_ bv1 32)) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv2 32) |ULTIMATE.start_main_~B~0#1|)) .cse1 .cse2 (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~B~0#1|) (bvuge |ULTIMATE.start_main_~B~0#1| (_ bv1 32)) .cse4) (and (= (_ bv2 32) ~counter~0) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv4 32) |ULTIMATE.start_main_~B~0#1|)) .cse1 .cse2 (bvuge |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~B~0#1| (_ bv2 32))) .cse3 .cse4))) [2021-11-12 22:41:17,097 INFO L858 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-11-12 22:41:17,098 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-12 22:41:17,098 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 22:41:17,098 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-12 22:41:17,098 INFO L861 garLoopResultBuilder]: At program point L51(lines 26 52) the Hoare annotation is: true [2021-11-12 22:41:17,098 INFO L858 garLoopResultBuilder]: For program point L45(lines 45 48) no Hoare annotation was computed. [2021-11-12 22:41:17,098 INFO L858 garLoopResultBuilder]: For program point L45-2(lines 26 52) no Hoare annotation was computed. [2021-11-12 22:41:17,098 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse3 (bvmul |ULTIMATE.start_main_~B~0#1| (_ bv2 32))) (.cse8 (= |ULTIMATE.start_main_~q~0#1| (_ bv1 32))) (.cse7 (= ~counter~0 (_ bv5 32))) (.cse0 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32))) (.cse2 (not (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~b~0#1|))) (.cse4 (exists ((|v_ULTIMATE.start_main_~b~0#1_29| (_ BitVec 32))) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv2 32) |v_ULTIMATE.start_main_~b~0#1_29|)))) (.cse5 (bvult |ULTIMATE.start_main_~B~0#1| (_ bv2147483647 32)))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|)) (and (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv4 32) |ULTIMATE.start_main_~B~0#1|)) .cse0 .cse1 .cse2 (bvuge |ULTIMATE.start_main_~r~0#1| .cse3) .cse4 (= (_ bv4 32) ~counter~0) .cse5) (let ((.cse6 (bvmul |ULTIMATE.start_main_~B~0#1| (_ bv4 32)))) (and (not (bvuge |ULTIMATE.start_main_~A~0#1| .cse6)) .cse7 (= |ULTIMATE.start_main_~b~0#1| (bvudiv .cse6 (_ bv2 32))) (= |ULTIMATE.start_main_~r~0#1| (bvadd (bvneg |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~A~0#1|)) .cse5 .cse8 (bvuge |ULTIMATE.start_main_~A~0#1| .cse3))) (let ((.cse9 (bvslt (bvadd (_ bv2 32) ~counter~0) (_ bv5 32)))) (and (or (not .cse9) (bvslt (bvadd (_ bv3 32) ~counter~0) (_ bv5 32))) (bvslt ~counter~0 (_ bv5 32)) (or .cse9 (not (bvslt (bvadd ~counter~0 (_ bv1 32)) (_ bv5 32)))) (= |ULTIMATE.start_main_~b~0#1| (bvudiv .cse3 (_ bv2 32))) (bvult |ULTIMATE.start_main_~B~0#1| .cse3) (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|) .cse5 .cse8)) (and (= (_ bv3 32) ~counter~0) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv2 32) |ULTIMATE.start_main_~B~0#1|)) .cse0 .cse1 .cse4 (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~B~0#1|) .cse5) (and .cse7 (exists ((|v_ULTIMATE.start_main_~b~0#1_67| (_ BitVec 32))) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~b~0#1_67|))) .cse0 .cse1 .cse2 .cse4 .cse5))) [2021-11-12 22:41:17,099 INFO L858 garLoopResultBuilder]: For program point L41-1(lines 40 49) no Hoare annotation was computed. [2021-11-12 22:41:17,099 INFO L858 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2021-11-12 22:41:17,099 INFO L858 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-12 22:41:17,099 INFO L858 garLoopResultBuilder]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2021-11-12 22:41:17,099 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 15 17) the Hoare annotation is: true [2021-11-12 22:41:17,100 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2021-11-12 22:41:17,100 INFO L858 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2021-11-12 22:41:17,100 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2021-11-12 22:41:17,100 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2021-11-12 22:41:17,101 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-11-12 22:41:17,101 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-11-12 22:41:17,101 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-11-12 22:41:17,104 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:17,106 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:41:17,117 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,118 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,118 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,119 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,119 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,119 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,119 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,120 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,120 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,120 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,121 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,121 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,121 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,132 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,132 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,132 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,133 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,133 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,133 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,133 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,134 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,134 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,134 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,134 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,135 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,135 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:41:17 BoogieIcfgContainer [2021-11-12 22:41:17,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:41:17,139 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:41:17,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:41:17,140 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:41:17,140 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:58" (3/4) ... [2021-11-12 22:41:17,143 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 22:41:17,151 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-12 22:41:17,151 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-12 22:41:17,156 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-11-12 22:41:17,157 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-12 22:41:17,157 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-12 22:41:17,157 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 22:41:17,186 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((3bv32 == counter && (\exists v_ULTIMATE.start_main_~b~0#1_67 : bv32 :: b == ~bvmul32(8bv32, v_ULTIMATE.start_main_~b~0#1_67))) && r == A) && q == 0bv32) && (\exists v_ULTIMATE.start_main_~b~0#1_29 : bv32 :: b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_29))) && ~bvult32(B, 2147483647bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_133 : bv32 :: ~bvuge32(r, ~bvmul32(v_ULTIMATE.start_main_~b~0#1_133, 2bv32)) && b == ~bvmul32(4bv32, v_ULTIMATE.start_main_~b~0#1_133))) || ((((((counter == 5bv32 && (\exists v_ULTIMATE.start_main_~b~0#1_67 : bv32 :: b == ~bvmul32(8bv32, v_ULTIMATE.start_main_~b~0#1_67))) && r == A) && q == 0bv32) && (\exists v_ULTIMATE.start_main_~b~0#1_29 : bv32 :: b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_29))) && ~bvult32(B, 2147483647bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_133 : bv32 :: ~bvuge32(r, ~bvmul32(v_ULTIMATE.start_main_~b~0#1_133, 2bv32)) && b == ~bvmul32(4bv32, v_ULTIMATE.start_main_~b~0#1_133)))) || (((((((\exists v_ULTIMATE.start_main_~b~0#1_67 : bv32 :: b == ~bvmul32(8bv32, v_ULTIMATE.start_main_~b~0#1_67)) && r == A) && q == 0bv32) && (\exists v_ULTIMATE.start_main_~b~0#1_29 : bv32 :: b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_29))) && 4bv32 == counter) && ~bvult32(B, 2147483647bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_133 : bv32 :: ~bvuge32(r, ~bvmul32(v_ULTIMATE.start_main_~b~0#1_133, 2bv32)) && b == ~bvmul32(4bv32, v_ULTIMATE.start_main_~b~0#1_133)))) || (((((q == 0bv32 && counter == 0bv32) && b == B) && ~bvadd64(r, ~bvmul32(q, b)) == A) && ~bvuge32(b, 1bv32)) && ~bvult32(B, 2147483647bv32))) || ((((((counter == 1bv32 && b == ~bvmul32(2bv32, B)) && r == A) && q == 0bv32) && ~bvuge32(r, B)) && ~bvuge32(B, 1bv32)) && ~bvult32(B, 2147483647bv32))) || ((((((2bv32 == counter && b == ~bvmul32(4bv32, B)) && r == A) && q == 0bv32) && ~bvuge32(r, ~bvmul32(B, 2bv32))) && (\exists v_ULTIMATE.start_main_~b~0#1_29 : bv32 :: b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_29))) && ~bvult32(B, 2147483647bv32)) [2021-11-12 22:41:17,198 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 22:41:17,199 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:41:17,200 INFO L158 Benchmark]: Toolchain (without parser) took 319386.97ms. Allocated memory was 54.5MB in the beginning and 92.3MB in the end (delta: 37.7MB). Free memory was 31.4MB in the beginning and 41.8MB in the end (delta: -10.5MB). Peak memory consumption was 26.4MB. Max. memory is 16.1GB. [2021-11-12 22:41:17,200 INFO L158 Benchmark]: CDTParser took 0.80ms. Allocated memory is still 54.5MB. Free memory was 35.9MB in the beginning and 35.8MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:41:17,201 INFO L158 Benchmark]: CACSL2BoogieTranslator took 337.22ms. Allocated memory was 54.5MB in the beginning and 75.5MB in the end (delta: 21.0MB). Free memory was 31.2MB in the beginning and 58.5MB in the end (delta: -27.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:41:17,201 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.96ms. Allocated memory is still 75.5MB. Free memory was 58.3MB in the beginning and 56.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:41:17,202 INFO L158 Benchmark]: Boogie Preprocessor took 31.74ms. Allocated memory is still 75.5MB. Free memory was 56.9MB in the beginning and 55.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:41:17,202 INFO L158 Benchmark]: RCFGBuilder took 477.13ms. Allocated memory is still 75.5MB. Free memory was 55.6MB in the beginning and 45.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:41:17,203 INFO L158 Benchmark]: TraceAbstraction took 318430.93ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 45.2MB in the beginning and 43.9MB in the end (delta: 1.2MB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. [2021-11-12 22:41:17,203 INFO L158 Benchmark]: Witness Printer took 59.90ms. Allocated memory is still 92.3MB. Free memory was 43.9MB in the beginning and 41.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:41:17,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80ms. Allocated memory is still 54.5MB. Free memory was 35.9MB in the beginning and 35.8MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 337.22ms. Allocated memory was 54.5MB in the beginning and 75.5MB in the end (delta: 21.0MB). Free memory was 31.2MB in the beginning and 58.5MB in the end (delta: -27.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.96ms. Allocated memory is still 75.5MB. Free memory was 58.3MB in the beginning and 56.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.74ms. Allocated memory is still 75.5MB. Free memory was 56.9MB in the beginning and 55.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 477.13ms. Allocated memory is still 75.5MB. Free memory was 55.6MB in the beginning and 45.5MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 318430.93ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 45.2MB in the beginning and 43.9MB in the end (delta: 1.2MB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. * Witness Printer took 59.90ms. Allocated memory is still 92.3MB. Free memory was 43.9MB in the beginning and 41.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] * 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 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 318.3s, OverallIterations: 15, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 58.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 48.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 903 SdHoareTripleChecker+Valid, 13691.11ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 898 mSDsluCounter, 3412 SdHoareTripleChecker+Invalid, 12813.61ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 253 IncrementalHoareTripleChecker+Unchecked, 2942 mSDsCounter, 347 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1336 IncrementalHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 347 mSolverCounterUnsat, 470 mSDtfsCounter, 1336 mSolverCounterSat, 45.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2877 GetRequests, 2576 SyntacticMatches, 15 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2354 ImplicationChecksByTransitivity, 149.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=10, InterpolantAutomatonStates: 195, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 110 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 90 PreInvPairs, 117 NumberOfFragments, 457 HoareAnnotationTreeSize, 90 FomulaSimplifications, 380 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1836 FormulaSimplificationTreeSizeReductionInter, 48.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 35.5s SatisfiabilityAnalysisTime, 166.8s InterpolantComputationTime, 1438 NumberOfCodeBlocks, 1438 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 2806 ConstructedInterpolants, 185 QuantifiedInterpolants, 18455 SizeOfPredicates, 115 NumberOfNonLiveVariables, 2867 ConjunctsInSsa, 443 ConjunctsInUnsatCore, 70 InterpolantComputations, 9 PerfectInterpolantSequences, 1665/2570 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant [2021-11-12 22:41:17,220 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,220 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,221 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,221 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,221 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,221 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,222 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,222 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,222 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,222 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,223 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,223 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,223 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,225 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,226 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,226 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,226 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,226 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,227 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,227 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,227 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,227 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_67,QUANTIFIED] [2021-11-12 22:41:17,227 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] [2021-11-12 22:41:17,228 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,228 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_133,QUANTIFIED] [2021-11-12 22:41:17,228 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_29,QUANTIFIED] Derived loop invariant: ((((((((((3bv32 == counter && (\exists v_ULTIMATE.start_main_~b~0#1_67 : bv32 :: b == ~bvmul32(8bv32, v_ULTIMATE.start_main_~b~0#1_67))) && r == A) && q == 0bv32) && (\exists v_ULTIMATE.start_main_~b~0#1_29 : bv32 :: b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_29))) && ~bvult32(B, 2147483647bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_133 : bv32 :: ~bvuge32(r, ~bvmul32(v_ULTIMATE.start_main_~b~0#1_133, 2bv32)) && b == ~bvmul32(4bv32, v_ULTIMATE.start_main_~b~0#1_133))) || ((((((counter == 5bv32 && (\exists v_ULTIMATE.start_main_~b~0#1_67 : bv32 :: b == ~bvmul32(8bv32, v_ULTIMATE.start_main_~b~0#1_67))) && r == A) && q == 0bv32) && (\exists v_ULTIMATE.start_main_~b~0#1_29 : bv32 :: b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_29))) && ~bvult32(B, 2147483647bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_133 : bv32 :: ~bvuge32(r, ~bvmul32(v_ULTIMATE.start_main_~b~0#1_133, 2bv32)) && b == ~bvmul32(4bv32, v_ULTIMATE.start_main_~b~0#1_133)))) || (((((((\exists v_ULTIMATE.start_main_~b~0#1_67 : bv32 :: b == ~bvmul32(8bv32, v_ULTIMATE.start_main_~b~0#1_67)) && r == A) && q == 0bv32) && (\exists v_ULTIMATE.start_main_~b~0#1_29 : bv32 :: b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_29))) && 4bv32 == counter) && ~bvult32(B, 2147483647bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_133 : bv32 :: ~bvuge32(r, ~bvmul32(v_ULTIMATE.start_main_~b~0#1_133, 2bv32)) && b == ~bvmul32(4bv32, v_ULTIMATE.start_main_~b~0#1_133)))) || (((((q == 0bv32 && counter == 0bv32) && b == B) && ~bvadd64(r, ~bvmul32(q, b)) == A) && ~bvuge32(b, 1bv32)) && ~bvult32(B, 2147483647bv32))) || ((((((counter == 1bv32 && b == ~bvmul32(2bv32, B)) && r == A) && q == 0bv32) && ~bvuge32(r, B)) && ~bvuge32(B, 1bv32)) && ~bvult32(B, 2147483647bv32))) || ((((((2bv32 == counter && b == ~bvmul32(4bv32, B)) && r == A) && q == 0bv32) && ~bvuge32(r, ~bvmul32(B, 2bv32))) && (\exists v_ULTIMATE.start_main_~b~0#1_29 : bv32 :: b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_29))) && ~bvult32(B, 2147483647bv32)) RESULT: Ultimate proved your program to be correct! [2021-11-12 22:41:17,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8ee5c0d-ef9f-45fb-bdaf-bac644f28c5c/bin/utaipan-vmNK8stdcF/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 Writing output log to file Ultimate.log Result: TRUE