./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 659b37265952a16fb6d0be01d182392fcf6fa60a0b92fef60d1f2fbbad338d83 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:15:03,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:15:03,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:15:03,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:15:03,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:15:03,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:15:03,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:15:03,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:15:03,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:15:03,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:15:03,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:15:03,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:15:03,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:15:03,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:15:03,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:15:03,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:15:03,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:15:03,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:15:03,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:15:03,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:15:03,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:15:03,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:15:03,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:15:03,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:15:03,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:15:03,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:15:03,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:15:03,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:15:03,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:15:03,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:15:03,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:15:03,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:15:03,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:15:03,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:15:03,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:15:03,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:15:03,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:15:03,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:15:03,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:15:03,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:15:03,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:15:03,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:15:03,688 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:15:03,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:15:03,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:15:03,689 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:15:03,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:15:03,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:15:03,690 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:15:03,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:15:03,691 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:15:03,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:15:03,691 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:15:03,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:15:03,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:15:03,692 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:15:03,692 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:15:03,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:15:03,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:15:03,693 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:15:03,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:15:03,695 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:15:03,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:15:03,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:15:03,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:15:03,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:15:03,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:15:03,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:15:03,696 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:15:03,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:15:03,697 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:15:03,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:15:03,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:15:03,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:15:03,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:03,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:15:03,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:15:03,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:15:03,699 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:15:03,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:15:03,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:15:03,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:15:03,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:15:03,701 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_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 659b37265952a16fb6d0be01d182392fcf6fa60a0b92fef60d1f2fbbad338d83 [2021-11-23 17:15:04,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:15:04,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:15:04,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:15:04,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:15:04,088 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:15:04,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem12_label28.c [2021-11-23 17:15:04,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data/187750f3e/9ef51673e0be4305ae5c32e300e6bfcd/FLAGa86a9b450 [2021-11-23 17:15:05,172 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:15:05,174 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/sv-benchmarks/c/eca-rers2012/Problem12_label28.c [2021-11-23 17:15:05,218 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data/187750f3e/9ef51673e0be4305ae5c32e300e6bfcd/FLAGa86a9b450 [2021-11-23 17:15:05,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data/187750f3e/9ef51673e0be4305ae5c32e300e6bfcd [2021-11-23 17:15:05,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:15:05,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:15:05,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:05,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:15:05,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:15:05,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:05" (1/1) ... [2021-11-23 17:15:05,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@565a3293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:05, skipping insertion in model container [2021-11-23 17:15:05,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:05" (1/1) ... [2021-11-23 17:15:05,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:15:05,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:15:06,048 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/sv-benchmarks/c/eca-rers2012/Problem12_label28.c[2824,2837] [2021-11-23 17:15:07,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:07,575 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:07,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/sv-benchmarks/c/eca-rers2012/Problem12_label28.c[2824,2837] [2021-11-23 17:15:08,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:08,504 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:08,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08 WrapperNode [2021-11-23 17:15:08,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:08,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:08,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:08,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:08,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:08,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:09,077 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-11-23 17:15:09,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:09,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:09,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:09,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:09,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:09,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:09,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:09,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:09,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:09,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:09,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:09,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:09,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:09,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:09,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:09,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:08" (1/1) ... [2021-11-23 17:15:09,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:09,954 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:09,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:10,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:10,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:15:10,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:10,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:10,128 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:10,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:15,610 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:15,680 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:15:15,686 INFO L158 Benchmark]: Toolchain (without parser) took 10123.20ms. Allocated memory was 92.3MB in the beginning and 589.3MB in the end (delta: 497.0MB). Free memory was 56.7MB in the beginning and 444.3MB in the end (delta: -387.6MB). Peak memory consumption was 225.9MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,687 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 67.0MB in the beginning and 66.9MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:15:15,688 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2943.83ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 56.4MB in the beginning and 52.8MB in the end (delta: 3.6MB). Peak memory consumption was 54.9MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,689 INFO L158 Benchmark]: Boogie Procedure Inliner took 571.60ms. Allocated memory was 130.0MB in the beginning and 161.5MB in the end (delta: 31.5MB). Free memory was 52.8MB in the beginning and 64.3MB in the end (delta: -11.5MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,690 INFO L158 Benchmark]: Boogie Preprocessor took 825.16ms. Allocated memory is still 161.5MB. Free memory was 64.3MB in the beginning and 50.0MB in the end (delta: 14.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,691 INFO L158 Benchmark]: RCFGBuilder took 5777.65ms. Allocated memory was 161.5MB in the beginning and 589.3MB in the end (delta: 427.8MB). Free memory was 50.0MB in the beginning and 444.3MB in the end (delta: -394.2MB). Peak memory consumption was 151.0MB. Max. memory is 16.1GB. [2021-11-23 17:15:15,696 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 67.0MB in the beginning and 66.9MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2943.83ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 56.4MB in the beginning and 52.8MB in the end (delta: 3.6MB). Peak memory consumption was 54.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 571.60ms. Allocated memory was 130.0MB in the beginning and 161.5MB in the end (delta: 31.5MB). Free memory was 52.8MB in the beginning and 64.3MB in the end (delta: -11.5MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 825.16ms. Allocated memory is still 161.5MB. Free memory was 64.3MB in the beginning and 50.0MB in the end (delta: 14.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * RCFGBuilder took 5777.65ms. Allocated memory was 161.5MB in the beginning and 589.3MB in the end (delta: 427.8MB). Free memory was 50.0MB in the beginning and 444.3MB in the end (delta: -394.2MB). Peak memory consumption was 151.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:15:15,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 659b37265952a16fb6d0be01d182392fcf6fa60a0b92fef60d1f2fbbad338d83 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:15:18,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:15:18,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:15:18,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:15:18,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:15:18,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:15:18,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:15:18,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:15:18,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:15:18,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:15:18,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:15:18,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:15:18,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:15:18,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:15:18,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:15:18,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:15:18,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:15:18,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:15:18,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:15:18,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:15:18,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:15:18,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:15:18,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:15:18,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:15:18,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:15:18,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:15:18,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:15:18,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:15:18,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:15:18,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:15:18,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:15:18,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:15:18,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:15:18,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:15:18,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:15:18,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:15:18,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:15:18,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:15:18,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:15:18,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:15:18,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:15:18,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:15:18,874 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:15:18,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:15:18,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:15:18,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:15:18,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:15:18,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:15:18,877 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:15:18,878 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:15:18,878 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:15:18,878 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:15:18,879 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:15:18,879 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:15:18,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:15:18,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:15:18,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:15:18,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:15:18,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:15:18,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:15:18,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:15:18,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:15:18,883 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:15:18,883 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:15:18,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:15:18,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:15:18,884 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:15:18,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:15:18,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:15:18,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:15:18,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:15:18,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:18,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:15:18,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:15:18,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:15:18,887 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:15:18,887 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:18,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:15:18,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:15:18,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:15:18,888 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_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 659b37265952a16fb6d0be01d182392fcf6fa60a0b92fef60d1f2fbbad338d83 [2021-11-23 17:15:19,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:15:19,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:15:19,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:15:19,473 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:15:19,474 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:15:19,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem12_label28.c [2021-11-23 17:15:19,580 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data/ff90aa530/ffcd4e5c4bac4b01924aa614ef8d831f/FLAG721a4fc34 [2021-11-23 17:15:20,776 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:15:20,778 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/sv-benchmarks/c/eca-rers2012/Problem12_label28.c [2021-11-23 17:15:20,827 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data/ff90aa530/ffcd4e5c4bac4b01924aa614ef8d831f/FLAG721a4fc34 [2021-11-23 17:15:21,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/data/ff90aa530/ffcd4e5c4bac4b01924aa614ef8d831f [2021-11-23 17:15:21,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:15:21,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:15:21,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:21,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:15:21,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:15:21,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:21" (1/1) ... [2021-11-23 17:15:21,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10002bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:21, skipping insertion in model container [2021-11-23 17:15:21,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:21" (1/1) ... [2021-11-23 17:15:21,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:15:21,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:15:21,689 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/sv-benchmarks/c/eca-rers2012/Problem12_label28.c[2824,2837] [2021-11-23 17:15:23,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:23,254 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:23,288 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/sv-benchmarks/c/eca-rers2012/Problem12_label28.c[2824,2837] [2021-11-23 17:15:24,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:24,126 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:24,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24 WrapperNode [2021-11-23 17:15:24,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:24,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:24,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:24,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:24,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,527 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4752 [2021-11-23 17:15:24,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:24,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:24,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:24,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:24,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:24,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:24,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:24,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:24,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (1/1) ... [2021-11-23 17:15:24,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:24,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:25,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:25,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:25,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:15:25,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:25,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:25,170 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:25,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:57,326 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:57,347 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:15:57,348 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:15:57,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:57 BoogieIcfgContainer [2021-11-23 17:15:57,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:15:57,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:15:57,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:15:57,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:15:57,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:15:21" (1/3) ... [2021-11-23 17:15:57,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ba1976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:57, skipping insertion in model container [2021-11-23 17:15:57,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:24" (2/3) ... [2021-11-23 17:15:57,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ba1976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:57, skipping insertion in model container [2021-11-23 17:15:57,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:57" (3/3) ... [2021-11-23 17:15:57,364 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label28.c [2021-11-23 17:15:57,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:15:57,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:15:57,441 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:15:57,450 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:15:57,451 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:15:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:15:57,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:57,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:57,510 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:57,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:57,517 INFO L85 PathProgramCache]: Analyzing trace with hash -279853278, now seen corresponding path program 1 times [2021-11-23 17:15:57,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:57,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589859936] [2021-11-23 17:15:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:57,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:57,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:57,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:57,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:15:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:57,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:57,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:57,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:57,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589859936] [2021-11-23 17:15:57,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589859936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:57,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:57,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:15:57,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860924995] [2021-11-23 17:15:57,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:57,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:57,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:57,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:57,940 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:40,390 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-23 17:16:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:40,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 17:16:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:40,435 INFO L225 Difference]: With dead ends: 2388 [2021-11-23 17:16:40,435 INFO L226 Difference]: Without dead ends: 1506 [2021-11-23 17:16:40,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:40,451 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 782 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:40,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 270 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 42.2s Time] [2021-11-23 17:16:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-23 17:16:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-23 17:16:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.7740863787375416) internal successors, (2670), 1505 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2670 transitions. [2021-11-23 17:16:40,631 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2670 transitions. Word has length 20 [2021-11-23 17:16:40,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:40,633 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2670 transitions. [2021-11-23 17:16:40,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2670 transitions. [2021-11-23 17:16:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 17:16:40,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:40,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:40,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:40,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:40,849 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1682811072, now seen corresponding path program 1 times [2021-11-23 17:16:40,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:40,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086782608] [2021-11-23 17:16:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:40,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:40,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:40,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:40,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:16:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:40,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:16:40,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:41,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:41,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:41,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086782608] [2021-11-23 17:16:41,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086782608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:41,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:41,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:16:41,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270691813] [2021-11-23 17:16:41,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:41,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:16:41,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:16:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:16:41,386 INFO L87 Difference]: Start difference. First operand 1506 states and 2670 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:19,796 INFO L93 Difference]: Finished difference Result 4514 states and 8006 transitions. [2021-11-23 17:17:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-23 17:17:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:19,833 INFO L225 Difference]: With dead ends: 4514 [2021-11-23 17:17:19,833 INFO L226 Difference]: Without dead ends: 3010 [2021-11-23 17:17:19,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:19,838 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 926 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:19,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 354 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 38.2s Time] [2021-11-23 17:17:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2021-11-23 17:17:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 3008. [2021-11-23 17:17:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.583305620219488) internal successors, (4761), 3007 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4761 transitions. [2021-11-23 17:17:19,928 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4761 transitions. Word has length 85 [2021-11-23 17:17:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:19,929 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4761 transitions. [2021-11-23 17:17:19,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4761 transitions. [2021-11-23 17:17:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 17:17:19,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:19,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:19,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:20,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:20,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1799945167, now seen corresponding path program 1 times [2021-11-23 17:17:20,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:20,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059577503] [2021-11-23 17:17:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:20,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:20,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:20,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:20,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:17:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:17:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:20,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:20,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:20,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059577503] [2021-11-23 17:17:20,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059577503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:20,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:20,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:17:20,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020741747] [2021-11-23 17:17:20,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:20,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:20,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:20,441 INFO L87 Difference]: Start difference. First operand 3008 states and 4761 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:03,041 INFO L93 Difference]: Finished difference Result 7516 states and 12056 transitions. [2021-11-23 17:18:03,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:18:03,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-23 17:18:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:03,068 INFO L225 Difference]: With dead ends: 7516 [2021-11-23 17:18:03,069 INFO L226 Difference]: Without dead ends: 4510 [2021-11-23 17:18:03,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:03,074 INFO L933 BasicCegarLoop]: 1300 mSDtfsCounter, 770 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:03,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 1308 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 42.4s Time] [2021-11-23 17:18:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-11-23 17:18:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-11-23 17:18:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.5460190729651808) internal successors, (6971), 4509 states have internal predecessors, (6971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6971 transitions. [2021-11-23 17:18:03,184 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6971 transitions. Word has length 91 [2021-11-23 17:18:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:03,184 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 6971 transitions. [2021-11-23 17:18:03,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6971 transitions. [2021-11-23 17:18:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 17:18:03,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:03,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:03,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:03,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:03,412 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:03,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:03,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1354087935, now seen corresponding path program 1 times [2021-11-23 17:18:03,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095633134] [2021-11-23 17:18:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:03,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:03,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:03,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:03,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:18:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:03,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:18:03,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:05,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:05,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:05,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095633134] [2021-11-23 17:18:05,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095633134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:05,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:05,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:05,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554232160] [2021-11-23 17:18:05,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:05,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:18:05,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:18:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:18:05,345 INFO L87 Difference]: Start difference. First operand 4510 states and 6971 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:38,593 INFO L93 Difference]: Finished difference Result 9796 states and 14958 transitions. [2021-11-23 17:18:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:18:38,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-23 17:18:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:38,622 INFO L225 Difference]: With dead ends: 9796 [2021-11-23 17:18:38,623 INFO L226 Difference]: Without dead ends: 5288 [2021-11-23 17:18:38,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:18:38,630 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 1346 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 3854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:38,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 711 Invalid, 3854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 33.0s Time] [2021-11-23 17:18:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2021-11-23 17:18:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5261. [2021-11-23 17:18:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.4692015209125475) internal successors, (7728), 5260 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7728 transitions. [2021-11-23 17:18:38,754 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7728 transitions. Word has length 111 [2021-11-23 17:18:38,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:38,754 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 7728 transitions. [2021-11-23 17:18:38,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7728 transitions. [2021-11-23 17:18:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 17:18:38,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:38,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:38,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:38,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:18:38,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1860048002, now seen corresponding path program 1 times [2021-11-23 17:18:38,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:38,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431261625] [2021-11-23 17:18:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:38,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:38,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:38,981 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:38,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:18:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:39,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:39,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:39,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431261625] [2021-11-23 17:18:39,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431261625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:39,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:39,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:18:39,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714860815] [2021-11-23 17:18:39,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:39,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:39,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:39,419 INFO L87 Difference]: Start difference. First operand 5261 states and 7728 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:16,688 INFO L93 Difference]: Finished difference Result 14275 states and 21665 transitions. [2021-11-23 17:19:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:19:16,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-23 17:19:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:16,737 INFO L225 Difference]: With dead ends: 14275 [2021-11-23 17:19:16,737 INFO L226 Difference]: Without dead ends: 9767 [2021-11-23 17:19:16,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:19:16,745 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 739 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 2971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:16,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 697 Invalid, 2971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 37.1s Time] [2021-11-23 17:19:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-11-23 17:19:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-11-23 17:19:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.300020479213598) internal successors, (12696), 9766 states have internal predecessors, (12696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12696 transitions. [2021-11-23 17:19:16,956 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12696 transitions. Word has length 161 [2021-11-23 17:19:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:16,957 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12696 transitions. [2021-11-23 17:19:16,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12696 transitions. [2021-11-23 17:19:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 17:19:16,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:16,960 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-11-23 17:19:16,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 17:19:17,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:17,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash 119979510, now seen corresponding path program 1 times [2021-11-23 17:19:17,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:17,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63420888] [2021-11-23 17:19:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:17,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:17,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:17,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:17,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:19:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:19:17,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 68 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 68 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:20,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:20,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63420888] [2021-11-23 17:19:20,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63420888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:19:20,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [232943369] [2021-11-23 17:19:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:20,436 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:19:20,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:19:20,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:19:20,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:19:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:19:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:21,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:22,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [232943369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:19:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363530414] [2021-11-23 17:19:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:22,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:19:22,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:19:22,646 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:19:22,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:19:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:22,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:19:22,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:23,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:23,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363530414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:23,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:19:23,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 5, 5] total 11 [2021-11-23 17:19:23,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113380422] [2021-11-23 17:19:23,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:23,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:19:23,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:23,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:19:23,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:19:23,184 INFO L87 Difference]: Start difference. First operand 9767 states and 12696 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:12,230 INFO L93 Difference]: Finished difference Result 26291 states and 35013 transitions. [2021-11-23 17:20:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:20:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-23 17:20:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:12,269 INFO L225 Difference]: With dead ends: 26291 [2021-11-23 17:20:12,270 INFO L226 Difference]: Without dead ends: 17277 [2021-11-23 17:20:12,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 871 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:20:12,283 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 675 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:12,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 607 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [692 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 48.8s Time] [2021-11-23 17:20:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2021-11-23 17:20:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 17277. [2021-11-23 17:20:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17277 states, 17276 states have (on average 1.2272516786293124) internal successors, (21202), 17276 states have internal predecessors, (21202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17277 states to 17277 states and 21202 transitions. [2021-11-23 17:20:12,581 INFO L78 Accepts]: Start accepts. Automaton has 17277 states and 21202 transitions. Word has length 177 [2021-11-23 17:20:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:12,582 INFO L470 AbstractCegarLoop]: Abstraction has 17277 states and 21202 transitions. [2021-11-23 17:20:12,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 17277 states and 21202 transitions. [2021-11-23 17:20:12,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-23 17:20:12,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:12,586 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:20:12,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:12,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 17:20:13,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:13,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:20:13,189 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:13,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1336895487, now seen corresponding path program 1 times [2021-11-23 17:20:13,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:13,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207398675] [2021-11-23 17:20:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:13,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:13,193 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:13,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:20:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:13,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:20:13,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:14,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:14,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:14,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207398675] [2021-11-23 17:20:14,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207398675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:14,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:14,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:20:14,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354062605] [2021-11-23 17:20:14,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:14,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:20:14,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:20:14,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:20:14,900 INFO L87 Difference]: Start difference. First operand 17277 states and 21202 transitions. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:46,286 INFO L93 Difference]: Finished difference Result 33835 states and 41679 transitions. [2021-11-23 17:20:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:20:46,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-11-23 17:20:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:46,322 INFO L225 Difference]: With dead ends: 33835 [2021-11-23 17:20:46,322 INFO L226 Difference]: Without dead ends: 17277 [2021-11-23 17:20:46,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:20:46,336 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 684 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3642 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 3642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:46,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 710 Invalid, 3642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3642 Invalid, 0 Unknown, 0 Unchecked, 31.2s Time] [2021-11-23 17:20:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2021-11-23 17:20:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 17277. [2021-11-23 17:20:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17277 states, 17276 states have (on average 1.2271937948599212) internal successors, (21201), 17276 states have internal predecessors, (21201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17277 states to 17277 states and 21201 transitions. [2021-11-23 17:20:46,586 INFO L78 Accepts]: Start accepts. Automaton has 17277 states and 21201 transitions. Word has length 211 [2021-11-23 17:20:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:46,587 INFO L470 AbstractCegarLoop]: Abstraction has 17277 states and 21201 transitions. [2021-11-23 17:20:46,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:46,587 INFO L276 IsEmpty]: Start isEmpty. Operand 17277 states and 21201 transitions. [2021-11-23 17:20:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-23 17:20:46,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:46,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:20:46,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:46,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:46,808 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1809728391, now seen corresponding path program 1 times [2021-11-23 17:20:46,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:46,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321354568] [2021-11-23 17:20:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:46,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:46,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:46,812 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:46,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:20:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:20:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:47,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:47,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:47,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321354568] [2021-11-23 17:20:47,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321354568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:47,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:47,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:20:47,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593385856] [2021-11-23 17:20:47,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:47,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:20:47,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:20:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:20:47,481 INFO L87 Difference]: Start difference. First operand 17277 states and 21201 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:36,204 INFO L93 Difference]: Finished difference Result 33801 states and 41644 transitions. [2021-11-23 17:21:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:36,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-11-23 17:21:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:36,245 INFO L225 Difference]: With dead ends: 33801 [2021-11-23 17:21:36,245 INFO L226 Difference]: Without dead ends: 17277 [2021-11-23 17:21:36,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:36,263 INFO L933 BasicCegarLoop]: 1340 mSDtfsCounter, 682 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2776 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 3146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 2776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:36,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1347 Invalid, 3146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 2776 Invalid, 0 Unknown, 0 Unchecked, 48.5s Time] [2021-11-23 17:21:36,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2021-11-23 17:21:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 17277. [2021-11-23 17:21:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17277 states, 17276 states have (on average 1.1990622829358648) internal successors, (20715), 17276 states have internal predecessors, (20715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17277 states to 17277 states and 20715 transitions. [2021-11-23 17:21:36,526 INFO L78 Accepts]: Start accepts. Automaton has 17277 states and 20715 transitions. Word has length 247 [2021-11-23 17:21:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:36,527 INFO L470 AbstractCegarLoop]: Abstraction has 17277 states and 20715 transitions. [2021-11-23 17:21:36,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:36,527 INFO L276 IsEmpty]: Start isEmpty. Operand 17277 states and 20715 transitions. [2021-11-23 17:21:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-23 17:21:36,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:36,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:36,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:36,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:36,746 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash -579157763, now seen corresponding path program 1 times [2021-11-23 17:21:36,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:36,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46768148] [2021-11-23 17:21:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:36,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:36,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:36,750 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:36,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:21:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:36,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:21:36,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:21:37,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:21:38,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46768148] [2021-11-23 17:21:38,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46768148] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:21:38,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:21:38,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:21:38,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337019245] [2021-11-23 17:21:38,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:38,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:38,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:38,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:38,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:21:38,525 INFO L87 Difference]: Start difference. First operand 17277 states and 20715 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:41,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:21:43,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:21:46,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:21:52,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:02,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:14,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:22,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:24,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:26,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:40,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:47,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:00,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:03,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:19,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:22,863 INFO L93 Difference]: Finished difference Result 42813 states and 52212 transitions. [2021-11-23 17:23:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-11-23 17:23:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:22,914 INFO L225 Difference]: With dead ends: 42813 [2021-11-23 17:23:22,914 INFO L226 Difference]: Without dead ends: 26289 [2021-11-23 17:23:22,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:23:22,926 INFO L933 BasicCegarLoop]: 1395 mSDtfsCounter, 677 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 546 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 3075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:22,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 1403 Invalid, 3075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 2528 Invalid, 1 Unknown, 0 Unchecked, 104.0s Time] [2021-11-23 17:23:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26289 states. [2021-11-23 17:23:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26289 to 26289. [2021-11-23 17:23:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26289 states, 26288 states have (on average 1.189706329884358) internal successors, (31275), 26288 states have internal predecessors, (31275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26289 states to 26289 states and 31275 transitions. [2021-11-23 17:23:23,314 INFO L78 Accepts]: Start accepts. Automaton has 26289 states and 31275 transitions. Word has length 251 [2021-11-23 17:23:23,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:23,315 INFO L470 AbstractCegarLoop]: Abstraction has 26289 states and 31275 transitions. [2021-11-23 17:23:23,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 26289 states and 31275 transitions. [2021-11-23 17:23:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-23 17:23:23,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:23,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:23,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:23,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:23,536 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1491648951, now seen corresponding path program 1 times [2021-11-23 17:23:23,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:23,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420025786] [2021-11-23 17:23:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:23,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:23,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:23,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:23,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:23:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:23,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:23:23,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:24,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:25,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:25,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420025786] [2021-11-23 17:23:25,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420025786] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:23:25,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:23:25,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:23:25,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659164389] [2021-11-23 17:23:25,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:25,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:25,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:25,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:25,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:23:25,470 INFO L87 Difference]: Start difference. First operand 26289 states and 31275 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:14,008 INFO L93 Difference]: Finished difference Result 59335 states and 70820 transitions. [2021-11-23 17:24:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 276 [2021-11-23 17:24:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:14,057 INFO L225 Difference]: With dead ends: 59335 [2021-11-23 17:24:14,057 INFO L226 Difference]: Without dead ends: 33799 [2021-11-23 17:24:14,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:24:14,073 INFO L933 BasicCegarLoop]: 1397 mSDtfsCounter, 650 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2439 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:14,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 1405 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2439 Invalid, 0 Unknown, 0 Unchecked, 48.3s Time] [2021-11-23 17:24:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33799 states. [2021-11-23 17:24:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33799 to 33799. [2021-11-23 17:24:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33799 states, 33798 states have (on average 1.1747144801467542) internal successors, (39703), 33798 states have internal predecessors, (39703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33799 states to 33799 states and 39703 transitions. [2021-11-23 17:24:14,757 INFO L78 Accepts]: Start accepts. Automaton has 33799 states and 39703 transitions. Word has length 276 [2021-11-23 17:24:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:14,758 INFO L470 AbstractCegarLoop]: Abstraction has 33799 states and 39703 transitions. [2021-11-23 17:24:14,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 33799 states and 39703 transitions. [2021-11-23 17:24:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-23 17:24:14,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:14,772 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:14,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:14,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:14,995 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash 458197800, now seen corresponding path program 1 times [2021-11-23 17:24:15,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:15,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757914915] [2021-11-23 17:24:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:15,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:15,120 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:15,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:24:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:24:15,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:16,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 133 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:30,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757914915] [2021-11-23 17:24:30,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757914915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1492117884] [2021-11-23 17:24:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:30,329 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:30,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:24:30,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:24:30,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:24:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:30,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:24:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-23 17:24:31,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:31,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1492117884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:31,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:24:31,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 17:24:31,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410261745] [2021-11-23 17:24:31,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:31,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:31,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:31,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:31,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:24:31,080 INFO L87 Difference]: Start difference. First operand 33799 states and 39703 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:17,907 INFO L93 Difference]: Finished difference Result 84869 states and 101708 transitions. [2021-11-23 17:25:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:17,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2021-11-23 17:25:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:18,077 INFO L225 Difference]: With dead ends: 84869 [2021-11-23 17:25:18,077 INFO L226 Difference]: Without dead ends: 51823 [2021-11-23 17:25:18,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:18,145 INFO L933 BasicCegarLoop]: 1415 mSDtfsCounter, 740 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:18,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 1423 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 46.4s Time] [2021-11-23 17:25:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51823 states. [2021-11-23 17:25:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51823 to 51072. [2021-11-23 17:25:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51072 states, 51071 states have (on average 1.1392375320632062) internal successors, (58182), 51071 states have internal predecessors, (58182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51072 states to 51072 states and 58182 transitions. [2021-11-23 17:25:19,114 INFO L78 Accepts]: Start accepts. Automaton has 51072 states and 58182 transitions. Word has length 282 [2021-11-23 17:25:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:19,115 INFO L470 AbstractCegarLoop]: Abstraction has 51072 states and 58182 transitions. [2021-11-23 17:25:19,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 51072 states and 58182 transitions. [2021-11-23 17:25:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-11-23 17:25:19,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:19,139 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:19,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:19,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 17:25:19,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:19,543 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:19,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1776899887, now seen corresponding path program 1 times [2021-11-23 17:25:19,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:19,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053014693] [2021-11-23 17:25:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:19,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:19,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:19,550 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:19,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:25:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:19,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 348 proven. 70 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-23 17:25:21,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-23 17:25:22,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:22,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053014693] [2021-11-23 17:25:22,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053014693] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:25:22,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:25:22,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:25:22,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316810485] [2021-11-23 17:25:22,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:22,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:22,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:22,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:22,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:25:22,724 INFO L87 Difference]: Start difference. First operand 51072 states and 58182 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:01,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:27:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:47,314 INFO L93 Difference]: Finished difference Result 111905 states and 128851 transitions. [2021-11-23 17:27:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:47,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 405 [2021-11-23 17:27:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:47,486 INFO L225 Difference]: With dead ends: 111905 [2021-11-23 17:27:47,486 INFO L226 Difference]: Without dead ends: 61586 [2021-11-23 17:27:47,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:27:47,576 INFO L933 BasicCegarLoop]: 1183 mSDtfsCounter, 715 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:47,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 1190 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 144.0s Time] [2021-11-23 17:27:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61586 states. [2021-11-23 17:27:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61586 to 61586. [2021-11-23 17:27:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61586 states, 61585 states have (on average 1.1537712105220428) internal successors, (71055), 61585 states have internal predecessors, (71055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61586 states to 61586 states and 71055 transitions. [2021-11-23 17:27:49,002 INFO L78 Accepts]: Start accepts. Automaton has 61586 states and 71055 transitions. Word has length 405 [2021-11-23 17:27:49,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:49,003 INFO L470 AbstractCegarLoop]: Abstraction has 61586 states and 71055 transitions. [2021-11-23 17:27:49,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 61586 states and 71055 transitions. [2021-11-23 17:27:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-11-23 17:27:49,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:49,016 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:49,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:49,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:49,233 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash -417643419, now seen corresponding path program 1 times [2021-11-23 17:27:49,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:49,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431340471] [2021-11-23 17:27:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:49,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:49,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:49,238 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:49,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373aeb49-1cfa-4ee3-9fb4-21fa24a65cda/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:27:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:49,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:49,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 360 proven. 78 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-23 17:27:50,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 438 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-23 17:27:52,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:52,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431340471] [2021-11-23 17:27:52,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431340471] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:27:52,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:27:52,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:27:52,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132967817] [2021-11-23 17:27:52,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:52,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:52,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:52,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:52,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:27:52,363 INFO L87 Difference]: Start difference. First operand 61586 states and 71055 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:29,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []